openswan源码ubantu下编译、安装、基本环境搭建
openswan的编译过程
文章目录
1. 下载源码：
对于openswan源码，我们是从官网上下载的。这里提供两个不同的网站：
专门下载openswan源码的网站
openswan官网页面
2. 在虚拟机上解压后编译：
我解压后的源码目录为：root@ubantu:/usr/src/openswan-2.6.51.5#
2.1 查看INSTALL文件
root@ubantu:/usr/src/openswan-2.6.51.5# cat INSTALL
Please read the documentation in doc/ & docs/
Building userland:
make programs install
Building KLIPS kernel module on 2.4 (assuming your kernel source is /usr/src/linux-2.4)
make KERNELSRC=/usr/src/linux-2.4 module minstall
Building KLIPS kernel module on 2.6
make KERNELSRC=/lib/modules/`uname -r`/build module minstall
root@ubantu:/usr/src/openswan-2.6.51.5#
从这个文件可以看出直接运行make programs install命令即可。直接输入该命令进行编译：
root@ubantu:/usr/src/openswan-2.6.51.5# make programs install
OBJDIR: OBJ.linux.x86_64
(cd /usr/src/openswan-2.6.51.5/OBJ.linux.x86_64 && OBJDIRTOP=/usr/src/openswan-2.6.51.5/OBJ.linux.x86_64 OBJDIR=/usr/src/openswan-2.6.51.5/OBJ.linux.x86_64 make programs )
make[1]: Entering directory '/usr/src/openswan-2.6.51.5/OBJ.linux.x86_64'
make[2]: Entering directory '/usr/src/openswan-2.6.51.5/OBJ.linux.x86_64/lib'
make[3]: Entering directory '/usr/src/openswan-2.6.51.5/OBJ.linux.x86_64/lib/libopenswan'
CC id.c
In file included from /usr/src/openswan-2.6.51.5/include/certs.h:24:0,
from /usr/src/openswan-2.6.51.5/lib/libopenswan/id.c:42:
/usr/src/openswan-2.6.51.5/include/secrets.h:20:10: fatal error: gmp.h: No such file or directory
#include <gmp.h> /* GNU MP library */
^~~~~~~
compilation terminated.
/usr/src/openswan-2.6.51.5/lib/libopenswan/Makefile:175: recipe for target 'id.o' failed
make[3]: *** [id.o] Error 1
make[3]: Leaving directory '/usr/src/openswan-2.6.51.5/OBJ.linux.x86_64/lib/libopenswan'
/usr/src/openswan-2.6.51.5/lib/Makefile:37: recipe for target 'programs' failed
make[2]: *** [programs] Error 1
make[2]: Leaving directory '/usr/src/openswan-2.6.51.5/OBJ.linux.x86_64/lib'
Makefile:10: recipe for target 'programs' failed
make[1]: *** [programs] Error 1
make[1]: Leaving directory '/usr/src/openswan-2.6.51.5/OBJ.linux.x86_64'
Makefile:185: recipe for target 'programs' failed
make: *** [programs] Error 2
root@ubantu:/usr/src/openswan-2.6.51.5#
提示有错误：/usr/src/openswan-2.6.51.5/include/secrets.h:20:10: fatal error: gmp.h: No such file or directory。
2.2 查看文件buildlin.sh文件
由于提示上述错误，且INSTALL文件中也没有相关说明，因此我看了下其他的文件，发现在buildlin.sh中有相关的依赖。从这个名字上就能看出这个是Linux下的自动编译脚本，因此我就尝试运行了下：
root@ubantu:/usr/src/openswan-2.6.51.5# ./buildlin.sh
You need to install libgmp-dev.
apt-get install libgmp-dev
or yum install gmp-dev
You need to install bison.
apt-get install bison
or yum install bison
You need to install flex.
apt-get install flex
or yum install flex
root@ubantu:/usr/src/openswan-2.6.51.5#
提示的结果是：缺少相应的库，而第一个和我们上述的错误是相关的。因此一次安装提示的几个库：
apt-get install libgmp-dev
apt-get install bison
apt-get install flex
安装成功后，重新执行make programs install(这实际上是两个命令make programs和make install，可以分开单独执行),结果成功编译安装：
root@ubantu:/usr/src/openswan-2.6.51.5# make programs install
OBJDIR: OBJ.linux.x86_64
(cd /usr/src/openswan-2.6.51.5/OBJ.linux.x86_64 && OBJDIRTOP=/usr/src/openswan-2.6.51.5/OBJ.linux.x86_64 OBJDIR=/usr/src/openswan-2.6.51.5/OBJ.linux.x86_64 make programs )
make[1]: Entering directory '/usr/src/openswan-2.6.51.5/OBJ.linux.x86_64'
make[2]: Entering directory '/usr/src/openswan-2.6.51.5/OBJ.linux.x86_64/lib'
make[3]: Entering directory '/usr/src/openswan-2.6.51.5/OBJ.linux.x86_64/lib/libopenswan'
CC id.c
CC initaddr.c
CC initsaid.c
CC initsubnet.c
CC iprange.c
CC keyblobtoid.c
CC kernel_alg.c
CC lex.c
CC mpzfuncs.c
CC optionsfrom.c
CC oswconf.c
... ...
make[3]: Leaving directory '/usr/src/openswan-2.6.51.5/OBJ.linux.x86_64/programs/tncfg'
make[3]: Entering directory '/usr/src/openswan-2.6.51.5/OBJ.linux.x86_64/programs/klipsdebug'
make[3]: Leaving directory '/usr/src/openswan-2.6.51.5/OBJ.linux.x86_64/programs/klipsdebug'
make[3]: Entering directory '/usr/src/openswan-2.6.51.5/OBJ.linux.x86_64/programs/pf_key'
make[3]: Leaving directory '/usr/src/openswan-2.6.51.5/OBJ.linux.x86_64/programs/pf_key'
make[3]: Entering directory '/usr/src/openswan-2.6.51.5/OBJ.linux.x86_64/programs/_updown.mast'
make[3]: Leaving directory '/usr/src/openswan-2.6.51.5/OBJ.linux.x86_64/programs/_updown.mast'
make[3]: Entering directory '/usr/src/openswan-2.6.51.5/OBJ.linux.x86_64/programs/_startnetkey'
make[3]: Leaving directory '/usr/src/openswan-2.6.51.5/OBJ.linux.x86_64/programs/_startnetkey'
make[3]: Entering directory '/usr/src/openswan-2.6.51.5/OBJ.linux.x86_64/programs/_updown.netkey'
make[3]: Leaving directory '/usr/src/openswan-2.6.51.5/OBJ.linux.x86_64/programs/_updown.netkey'
make[2]: Leaving directory '/usr/src/openswan-2.6.51.5/OBJ.linux.x86_64/programs'
make[1]: Leaving directory '/usr/src/openswan-2.6.51.5/OBJ.linux.x86_64'
mkdir -p /usr/local/libexec/ipsec
if [ -n '' ]; then echo ' ' >/usr/local/lib/ipsec/vendor.txt; fi
root@ubantu:/usr/src/openswan-2.6.51.5#
3. 查看是否安装成功：
3.1 查看版本信息：
root@ubantu:/usr/src/openswan-2.6.51.5/docs# ipsec --version
Linux Openswan U2.6.51.5/K(no kernel code presently loaded)
See `ipsec --copyright' for copyright information.
root@ubantu:/usr/src/openswan-2.6.51.5/docs#
可以看出我安装的是Linux Openswan U2.6.51.5/K版本
3.2 执行ipsec verify命令：
注意：下面可能只是我的虚拟环境配置导致的问题，不是没有给人会遇到(如果是纯净的环境可能会遇到)
执行ipsec verify命令后提示有错误：命令找不到
root@ubantu:/etc/ipsec.d/examples# ipsec verify
/usr/local/sbin/ipsec: 148: exec: /usr/local/libexec/ipsec/verify: not found
root@ubantu:/etc/ipsec.d/examples#
然后我进入到此目录，查看verify命令是否存在：
root@ubantu:/usr/local/libexec/ipsec# ls *verify*
verify verify.old
root@ubantu:/usr/local/libexec/ipsec#
结果是存在此文件(命令)，然后我查看了下是否有执行权限：
root@ubantu:/usr/local/libexec/ipsec# ll
total 24112
drwxr-xr-x 2 root root 4096 4月 30 09:03 ./
drwxr-xr-x 3 root root 4096 4月 30 08:10 ../
-rwxr-xr-x 1 root root 1473304 4月 30 09:03 addconn*
-rwxr-xr-x 1 root root 1473304 4月 30 09:02 addconn.old*
-rwxr-xr-x 1 root root 5122 4月 30 09:03 auto*
-rwxr-xr-x 1 root root 5122 4月 30 09:02 auto.old*
-rwxr-xr-x 1 root root 11297 4月 30 09:03 barf*
-rwxr-xr-x 1 root root 11297 4月 30 09:02 barf.old*
-rwxr-xr-x 1 root root 498600 4月 30 09:03 eroute*
-rwxr-xr-x 1 root root 498600 4月 30 09:02 eroute.old*
-rwxr-xr-x 1 root root 442432 4月 30 09:03 ikeping*
-rwxr-xr-x 1 root root 442432 4月 30 09:02 ikeping.old*
-rwxr-xr-x 1 root root 1028 4月 30 09:03 initnss*
-rwxr-xr-x 1 root root 1028 4月 30 09:02 initnss.old*
-rwxr-xr-x 1 root root 430320 4月 30 09:03 klipsdebug*
-rwxr-xr-x 1 root root 430320 4月 30 09:02 klipsdebug.old*
-rwxr-xr-x 1 root root 2783 4月 30 09:03 look*
-rwxr-xr-x 1 root root 2783 4月 30 09:02 look.old*
-rwxr-xr-x 1 root root 2480 4月 30 09:03 newhostkey*
-rwxr-xr-x 1 root root 2480 4月 30 09:02 newhostkey.old*
-rwxr-xr-x 1 root root 400136 4月 30 09:03 pf_key*
-rwxr-xr-x 1 root root 400136 4月 30 09:02 pf_key.old*
-rwxr-xr-x 1 root root 5405512 4月 30 09:03 pluto*
-rwxr-xr-x 1 root root 5405512 4月 30 09:02 pluto.old*
-rwxr-xr-x 1 root root 12349 4月 30 09:03 policy*
-rwxr-xr-x 1 root root 12349 4月 30 09:02 policy.old*
-rwxr-xr-x 1 root root 35784 4月 30 09:03 ranbits*
-rwxr-xr-x 1 root root 35784 4月 30 09:02 ranbits.old*
-rwxr-xr-x 1 root root 106800 4月 30 09:03 rsasigkey*
-rwxr-xr-x 1 root root 106800 4月 30 09:02 rsasigkey.old*
-rwxr-xr-x 1 root root 704 4月 30 09:03 secrets*
-rwxr-xr-x 1 root root 704 4月 30 09:02 secrets.old*
lrwxrwxrwx 1 root root 17 4月 30 09:03 setup -> /etc/init.d/ipsec*
-rwxr-xr-x 1 root root 1126 4月 30 09:03 showdefaults*
-rwxr-xr-x 1 root root 1126 4月 30 09:02 showdefaults.old*
-rwxr-xr-x 1 root root 1296672 4月 30 09:03 showhostkey*
-rwxr-xr-x 1 root root 1296672 4月 30 09:02 showhostkey.old*
-rwxr-xr-x 1 root root 670080 4月 30 09:03 spi*
-rwxr-xr-x 1 root root 464944 4月 30 09:03 spigrp*
-rwxr-xr-x 1 root root 464944 4月 30 09:02 spigrp.old*
-rwxr-xr-x 1 root root 670080 4月 30 09:02 spi.old*
-rwxr-xr-x 1 root root 1064 4月 30 09:03 status*
-rwxr-xr-x 1 root root 1064 4月 30 09:02 status.old*
-rwxr-xr-x 1 root root 426232 4月 30 09:03 tncfg*
-rwxr-xr-x 1 root root 426232 4月 30 09:02 tncfg.old*
-rwxr-xr-x 1 root root 16879 4月 30 09:03 verify*
-rwxr-xr-x 1 root root 16879 4月 30 09:02 verify.old*
-rwxr-xr-x 1 root root 579136 4月 30 09:03 whack*
-rwxr-xr-x 1 root root 579136 4月 30 09:02 whack.old*
root@ubantu:/usr/local/libexec/ipsec#
第48行显示是有执行权限的，那么是怎么回事呢？
我又查看了下verify这个文件的类型：
root@ubantu:/usr/local/libexec/ipsec# file verify
verify: Python script, ASCII text executable
root@ubantu:/usr/local/libexec/ipsec#
结果显示：verify是一个python脚本
然后我又看了先我的虚拟机是否有安装python工具：通过输入python命令或者直接输入刚才要执行的命令python verify都可以看到以下提示信息：
root@ubantu:/usr/local/libexec/ipsec# python
Command 'python' not found, but can be installed with:
apt install python3
apt install python
apt install python-minimal
You also have python3 installed, you can run 'python3' instead.
结果自然是没有安装python环境，于是乎我按提示安装最小的python环境apt install python-minimal
root@ubantu:/usr/local/libexec/ipsec# apt install python-minimal
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
linux-headers-4.18.0-15 linux-headers-4.18.0-15-generic linux-image-4.18.0-15-generic linux-modules-4.18.0-15-generic
linux-modules-extra-4.18.0-15-generic
Use 'sudo apt autoremove' to remove them.
The following additional packages will be installed:
libpython-stdlib python python2.7 python2.7-minimal
Suggested packages:
python-doc python-tk python2.7-doc binfmt-support
The following NEW packages will be installed:
libpython-stdlib python python-minimal python2.7 python2.7-minimal
0 upgraded, 5 newly installed, 0 to remove and 265 not upgraded.
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root@ubantu:/usr/local/libexec/ipsec#
成功安装上python后，重新执行ipsec verify，结果如下：
root@ubantu:/usr/local/libexec/ipsec# ipsec verify
/usr/local/libexec/ipsec/verify
Checking if IPsec got installed and started correctly:
Version check and ipsec on-path [OK]
Openswan U2.6.51.5/K5.3.0-46-generic (netkey)
See `ipsec --copyright' for copyright information.
Checking for IPsec support in kernel [OK]
NETKEY: Testing XFRM related proc values
ICMP default/send_redirects [NOT DISABLED]
Disable /proc/sys/net/ipv4/conf/*/send_redirects or NETKEY will cause act on or cause sending of bogus ICMP redirects!
ICMP default/accept_redirects [NOT DISABLED]
Disable /proc/sys/net/ipv4/conf/*/accept_redirects or NETKEY will cause act on or cause sending of bogus ICMP redirects!
XFRM larval drop [OK]
Hardware random device check [N/A]
Checking rp_filter [ENABLED]
/proc/sys/net/ipv4/conf/all/rp_filter [ENABLED]
/proc/sys/net/ipv4/conf/default/rp_filter [ENABLED]
Checking that pluto is running [OK]
Pluto listening for IKE on udp 500 [OK]
Pluto listening for IKE on tcp 500 [NOT IMPLEMENTED]
Pluto listening for IKE/NAT-T on udp 4500 [OK]
Pluto listening for IKE/NAT-T on tcp 4500 [NOT IMPLEMENTED]
Pluto listening for IKE on tcp 10000 (cisco) [NOT IMPLEMENTED]
Checking NAT and MASQUERADEing [TEST INCOMPLETE]
Checking 'ip' command [OK]
Checking 'iptables' command [OK]
ipsec verify: encountered errors
root@ubantu:/usr/local/libexec/ipsec#
算是解决了ipsec verify无法显示的问题。
3.3 启动IPSec服务：
通过命令/etc/init.d/ipsec start命令来启动IPSec服务（为啥我的服务打印了这么多信息我还不清楚，原来大的环境记得没这么多内容，但是应该不是出错的原因）：
root@ubantu:/usr/local/libexec/ipsec# /etc/init.d/ipsec start
export IPSECconfreadstatus=''
export IPSECklipsdebug=''
export IPSECplutodebug=''
export IPSECplutostderrlogtime='no'
export IPSECplutorestartoncrash='yes'
export IPSECdumpdir='/var/run/pluto/'
export IPSECplutowait='no'
export IPSECoe='no'
export IPSECfragicmp='yes'
export IPSEChidetos='yes'
export IPSECuniqueids='yes'
export IPSECnocrsend='no'
export IPSECstrictcrlpolicy='no'
export IPSECforce_busy='no'
export IPSECvirtual_private='%v4:10.0.0.0/8,%v4:192.168.0.0/16,%v4:172.16.0.0/12,%v4:25.0.0.0/8,%v6:fd00::/8,%v6:fe80::/10'
export IPSECnat_traversal='yes'
export IPSECdisable_port_floating='no'
export IPSECforce_keepalive='no'
export IPSECprotostack='auto'
export IPSECnhelpers='-1'
export IPSECsecctx_attr_value='32001'
# obsolete option 'IPSECforwardcontrol' ignored
# obsolete option 'IPSECrp_filter' ignored
# obsolete option 'IPSECplutofork' ignored
<27>Apr 30 10:09:19 ipsec_setup: /usr/local/lib/ipsec/_realsetup start
<27>Apr 30 10:09:19 ipsec_setup: Starting Openswan IPsec 2.6.51.5...
<27>Apr 30 10:09:19 ipsec_setup: /usr/local/lib/ipsec/_startklips --info /var/run/pluto/ipsec.info --debug --omtu --fragicmp --hidetos --log daemon.error %defaultroute
<27>Apr 30 10:09:19 ipsec_setup: No KLIPS support found while requested, desperately falling back to netkey
<27>Apr 30 10:09:20 ipsec_setup: NETKEY support found. Use protostack=netkey in /etc/ipsec.conf to avoid attempts to use KLIPS. Attempting to continue with NETKEY
<27>Apr 30 10:09:20 ipsec_setup: /usr/local/lib/ipsec/_startnetkey
<27>Apr 30 10:09:20 ipsec_setup: MANUALSTART_confreadstatus=
<27>Apr 30 10:09:20 ipsec_setup: MANUALSTART_confreadnames=""
<27>Apr 30 10:09:20 ipsec_setup: /usr/local/lib/ipsec/_plutorun --debug --uniqueids yes --force_busy --nocrsend --strictcrlpolicy --nat_traversal --keep_alive --protostack auto --force_keepalive --disable_port_floating no --virtual_private --listen --crlcheckinterval 0 --ocspuri --nhelpers --secctx_attr_value --dump --opts --stderrlog --wait no --plutostderrlogtime no --pre --post --log daemon.error --pid /var/run/pluto/pluto.pid
root@ubantu:/usr/local/libexec/ipsec#
然后重新通过ipsec verify查看启动情况：
root@ubantu:/usr/local/libexec/ipsec# ipsec verify
/usr/local/libexec/ipsec/verify
Checking if IPsec got installed and started correctly:
Version check and ipsec on-path [OK]
Openswan U2.6.51.5/K5.3.0-46-generic (netkey)
See `ipsec --copyright' for copyright information.
Checking for IPsec support in kernel [OK]
NETKEY: Testing XFRM related proc values
ICMP default/send_redirects [NOT DISABLED]
Disable /proc/sys/net/ipv4/conf/*/send_redirects or NETKEY will cause act on or cause sending of bogus ICMP redirects!
ICMP default/accept_redirects [NOT DISABLED]
Disable /proc/sys/net/ipv4/conf/*/accept_redirects or NETKEY will cause act on or cause sending of bogus ICMP redirects!
XFRM larval drop [OK]
Hardware random device check [N/A]
Checking rp_filter [ENABLED]
/proc/sys/net/ipv4/conf/all/rp_filter [ENABLED]
/proc/sys/net/ipv4/conf/default/rp_filter [ENABLED]
Checking that pluto is running [OK]
Pluto listening for IKE on udp 500 [OK]
Pluto listening for IKE on tcp 500 [NOT IMPLEMENTED]
Pluto listening for IKE/NAT-T on udp 4500 [DISABLED]
Pluto listening for IKE/NAT-T on tcp 4500 [NOT IMPLEMENTED]
Pluto listening for IKE on tcp 10000 (cisco) [NOT IMPLEMENTED]
Checking NAT and MASQUERADEing [TEST INCOMPLETE]
Checking 'ip' command [OK]
Checking 'iptables' command [OK]
ipsec verify: encountered errors
root@ubantu:/usr/local/libexec/ipsec#
该启动的基本成功启动。
3.4 修改配置文件：
3.4 修改配置文件：
由于使用ipsec verify命令查询模块信息时会提示Disable /proc/sys/net/ipv4/conf/*/send_redirects or NETKEY will cause act on or cause sending of bogus ICMP redirects!类似的信息,因此需要修改配置禁用ICMP的重定向功能。我根据网上的资料，整理了一个shell脚本。直接运行脚本即可：
#########################################################################
# File Name: openswan_redirects.sh
# Author: Toney Sun
# mail: vip_13031075266@163.com
# Created Time: 2020年05月01日 星期五 10时33分15秒
#########################################################################
#!/bin/bash
for each in /proc/sys/net/ipv4/conf/*
do
echo ${each##*/}
#echo 0 > $each/send_redirects
#echo 0 > $each/accept_redirects
echo "net.ipv4.conf.${each##*/}.send_redirects=0" >> /etc/sysctl.conf
echo "net.ipv4.conf.${each##*/}.accept_redirects=0" >> /etc/sysctl.conf
done
sysctl -p
3.5 重新启动ipsec功能：
再次输入命令重启ipsec功能：/etc/init.d/ipsec restart
root@ubantu:/etc/ipsec.d#
root@ubantu:/etc/ipsec.d# /etc/init.d/ipsec restart
<27>May 1 14:43:01 ipsec_setup: Stopping Openswan IPsec...
<27>May 1 14:43:02 ipsec_setup: Starting Openswan IPsec U2.6.51.5/K5.3.0-51-generic...
root@ubantu:/etc/ipsec.d#
注意：我在3.3时，启动ipsec服务，打印了很多内容，这里确实是有问题的，可能是配置文件有错误导致的。我花费了一个上午的时间也没有找到是什么原因。后来更换了一个配置文件（自己写的ipsec隧道连接信息）就好了:(。我想说的是正常的启动只有上述两行打印信息。。。
3.6 添加自己的隧道环境配置
这里我添加上自己的配置信息，这是个最基本的隧道协商配置，可以协商成功：
/etc/ipsec.conf
这个文件是openswan安装后的一个配置文件，可以在这个文件里添加隧道配置信息，但是我不推荐，因为我想尽可能的保留它的原有信息。只添加了最后一行，引入自己的配置文件(ipsec_vpn.conf)
# /etc/ipsec.conf - Openswan IPsec configuration file # This file: /usr/local/share/doc/openswan/ipsec.conf-sample
#
# Manual: ipsec.conf.5 version 2.0 # conforms to second version of ipsec.conf specification # basic configuration
config setup
# Do not set debug options to debug configuration issues!
# plutodebug / klipsdebug = "all", "none" or a combination from below:
# "raw crypt parsing emitting control klips pfkey natt x509 dpd private"
# eg:
# plutodebug="control parsing"
# Again: only enable plutodebug or klipsdebug when asked by a developer
#
# enable to get logs per-peer
# plutoopts="--perpeerlog"
#
# Enable core dumps (might require system changes, like ulimit -C)
# This is required for abrtd to work properly
# Note: incorrect SElinux policies might prevent pluto writing the core
dumpdir=/var/run/pluto/
#
# NAT-TRAVERSAL support, see README.NAT-Traversal
nat_traversal=yes
# exclude networks used on server side by adding %v4:!a.b.c.0/24
# It seems that T-Mobile in the US and Rogers/Fido in Canada are
# using 25/8 as "private" address space on their 3G network.
# This range has not been announced via BGP (at least upto 2010-12-21)
virtual_private=%v4:10.0.0.0/8,%v4:192.168.0.0/16,%v4:172.16.0.0/12,%v4:25.0.0.0/8,%v6:fd00::/8,%v6:fe80::/10
# OE is now off by default. Uncomment and change to on, to enable.
oe=off
# which IPsec stack to use. auto will try netkey, then klips then mast
#protostack=auto
protostack=netkey
# Use this to log to a file, or disable logging on embedded systems (like openwrt)
plutostderrlog=/var/log/pluto.log # Add connections here # sample VPN connection
# for more examples, see /etc/ipsec.d/examples/
#conn sample
# # Left security gateway, subnet behind it, nexthop toward right.
# left=10.0.0.1
# leftsubnet=172.16.0.0/24
# leftnexthop=10.22.33.44
# # Right security gateway, subnet behind it, nexthop toward left.
# right=10.12.12.1
# rightsubnet=192.168.0.0/24
# rightnexthop=10.101.102.103
# # To authorize this connection, but not actually start it,
# # at startup, uncomment this.
# #auto=add
include /etc/ipsec.d/ipsec_vpn.conf
/etc/ipsec.d/ipsec_vpn.conf
这个文件完全是自己的(当然是参考给的demo)隧道配置信息：
conn test
auto=start
pfs=no # PFS(Perfect Forward Secrecy)
compress=no # IP Compression
type=tunnel
keyingtries=0
disablearrivalcheck=no
## phase 1 ##
ike=aes128-sha1;modp1024 # 第一阶段参数
ikelifetime=86400s # 第一阶段的生存时间
keyexchange=ike
## phase 2 ##
phase2alg=aes128-sha1 # 第二阶段参数
salifetime=3600s # 第二阶段参数
phase2=esp
left=192.168.1.3
leftid=@left
leftsubnet=10.28.1.0/24
leftsourceip=192.168.1.3
leftnexthop=%defaultroute
right=192.168.1.13
rightid=@right
rightsubnet=10.28.2.0/24
rightsourceip=192.168.1.13
rightnexthop=%defaultroute
# rsakey AQPGLAfkE
leftrsasigkey=0sAQPGLAfkEfGISg4FfXZqRe47LMX5sGyG+0ec1b5FWDriEpy4tiOvjusVzx2eyP3PTM+J9uKW93GxRugxpqa82O/aegGpnUpWGHBnEBBIvjpiMawrv3RhtCYeXodMKKqI6jhdEYzU69AYHkbPI3jOtk8TVYhaoSEkDRoBkbUzasAXOCrxL6a61G8C8XwOaW0qz+yEaoYwh/Nhc0fz1li/vQWofwXuR7ZQ5FlfDUY+JCgqbIhpmUfA9mRtawqIupYxQO3j55lhX4yUT9mBcRl9dlUNZnNEXL3hvoIABm/O+xMTwM695JBF0lVM5MJ/zizy7TsbHFJlNEPuGMI/An4FseHK0pQwe4BUZ08A8izIiI9ZT4Lp
# rsakey AQOzIeXfR
rightrsasigkey=0sAQOzIeXfRPL5ODGw97Y6wwotc9LExdihgdfxprYLKukKSpe3oH9G6smILqqkU+8INImuHwpL7mDPqKxDWb/YiYxRgRciXAMkuhq8c/IjcVIbK9EXSmWyPkC1Rn5+cD+2FDUd85FtQWMlEObwLJDC0UxqN5ZoFr7sR0Kur9LqZFS1FlD72E/x3RckY1R/LiR27R83Zv2EXEi1lhYf/ZstKPsGuzlEAzSnyV6jRz9Urz/SFrnyL8vGapiq5p6q+PkBEqsw97Wp8taj8tzK+lH1oxMB4+ArUKhGNk/w+tKPgKrLI8AR2nh2892P6cN0dta83t67k8Mf0ZrOCpxWLcZUnjLkFBvs9fJca3ONXH2RA+jMjn1l
隧道两端可以使用同一个配置文件(已经区分开了左右的配置)。
隧道协商过程抓包如下：
使用命令行查看状态信息如下：
root@ubantu:/home# ipsec auto status
ipsec auto: warning: obsolete command syntax used
000 using kernel interface: netkey
000 interface ens33/ens33 2409:8a00:18eb:2b00:69e6:ab5c:116a:da03 (AF_INET6)
000 interface ens33/ens33 2409:8a00:18eb:2b00:cdca:7d9:32ac:4d08 (AF_INET6)
000 interface lo/lo ::1 (AF_INET6)
000 interface lo/lo 127.0.0.1 (AF_INET)
000 interface lo/lo 127.0.0.1 (AF_INET)
000 interface ens33/ens33 192.168.1.3 (AF_INET)
000 interface ens33/ens33 192.168.1.3 (AF_INET)
000 using secrets file: /etc/ipsec.secrets
000 %myid = (none)
000 debug none
000
000 virtual_private (%priv):
000 - allowed 6 subnets: 10.0.0.0/8, 192.168.0.0/16, 172.16.0.0/12, 25.0.0.0/8, fd00::/8, fe80::/10
000 - disallowed 0 subnets:
000 WARNING: Disallowed subnets in virtual_private= is empty. If you have
000 private address space in internal use, it should be excluded!
000
000 algorithm ESP encrypt: id=2, name=ESP_DES, ivlen=8, keysizemin=64, keysizemax=64
000 algorithm ESP encrypt: id=3, name=ESP_3DES, ivlen=8, keysizemin=192, keysizemax=192
000 algorithm ESP encrypt: id=6, name=ESP_CAST, ivlen=8, keysizemin=40, keysizemax=128
000 algorithm ESP encrypt: id=7, name=ESP_BLOWFISH, ivlen=8, keysizemin=40, keysizemax=448
000 algorithm ESP encrypt: id=11, name=ESP_NULL, ivlen=0, keysizemin=0, keysizemax=0
000 algorithm ESP encrypt: id=12, name=ESP_AES, ivlen=8, keysizemin=128, keysizemax=256
000 algorithm ESP encrypt: id=13, name=ESP_AES_CTR, ivlen=8, keysizemin=160, keysizemax=288
000 algorithm ESP encrypt: id=14, name=ESP_AES_CCM_A, ivlen=8, keysizemin=128, keysizemax=256
000 algorithm ESP encrypt: id=15, name=ESP_AES_CCM_B, ivlen=8, keysizemin=128, keysizemax=256
000 algorithm ESP encrypt: id=16, name=ESP_AES_CCM_C, ivlen=8, keysizemin=128, keysizemax=256
000 algorithm ESP encrypt: id=18, name=ESP_AES_GCM_A, ivlen=8, keysizemin=160, keysizemax=288
000 algorithm ESP encrypt: id=19, name=ESP_AES_GCM_B, ivlen=12, keysizemin=160, keysizemax=288
000 algorithm ESP encrypt: id=20, name=ESP_AES_GCM_C, ivlen=16, keysizemin=160, keysizemax=288
000 algorithm ESP encrypt: id=22, name=ESP_CAMELLIA, ivlen=8, keysizemin=128, keysizemax=256
000 algorithm ESP encrypt: id=252, name=ESP_SERPENT, ivlen=8, keysizemin=128, keysizemax=256
000 algorithm ESP encrypt: id=253, name=ESP_TWOFISH, ivlen=8, keysizemin=128, keysizemax=256
000 algorithm ESP auth attr: id=1, name=AUTH_ALGORITHM_HMAC_MD5, keysizemin=128, keysizemax=128
000 algorithm ESP auth attr: id=2, name=AUTH_ALGORITHM_HMAC_SHA1, keysizemin=160, keysizemax=160
000 algorithm ESP auth attr: id=5, name=AUTH_ALGORITHM_HMAC_SHA2_256, keysizemin=256, keysizemax=256
000 algorithm ESP auth attr: id=6, name=AUTH_ALGORITHM_HMAC_SHA2_384, keysizemin=384, keysizemax=384
000 algorithm ESP auth attr: id=7, name=AUTH_ALGORITHM_HMAC_SHA2_512, keysizemin=512, keysizemax=512
000 algorithm ESP auth attr: id=8, name=AUTH_ALGORITHM_HMAC_RIPEMD, keysizemin=160, keysizemax=160
000 algorithm ESP auth attr: id=9, name=AUTH_ALGORITHM_AES_CBC, keysizemin=128, keysizemax=128
000 algorithm ESP auth attr: id=251, name=AUTH_ALGORITHM_NULL_KAME, keysizemin=0, keysizemax=0
000
000 algorithm IKE encrypt: id=0, name=(null), blocksize=16, keydeflen=131
000 algorithm IKE encrypt: id=5, name=OAKLEY_3DES_CBC, blocksize=8, keydeflen=192
000 algorithm IKE encrypt: id=7, name=OAKLEY_AES_CBC, blocksize=16, keydeflen=128
000 algorithm IKE hash: id=1, name=OAKLEY_MD5, hashsize=16
000 algorithm IKE hash: id=2, name=OAKLEY_SHA1, hashsize=20
000 algorithm IKE hash: id=4, name=OAKLEY_SHA2_256, hashsize=32
000 algorithm IKE hash: id=6, name=OAKLEY_SHA2_512, hashsize=64
000 algorithm IKE dh group: id=2, name=OAKLEY_GROUP_MODP1024, bits=1024
000 algorithm IKE dh group: id=5, name=OAKLEY_GROUP_MODP1536, bits=1536
000 algorithm IKE dh group: id=14, name=OAKLEY_GROUP_MODP2048, bits=2048
000 algorithm IKE dh group: id=15, name=OAKLEY_GROUP_MODP3072, bits=3072
000 algorithm IKE dh group: id=16, name=OAKLEY_GROUP_MODP4096, bits=4096
000 algorithm IKE dh group: id=17, name=OAKLEY_GROUP_MODP6144, bits=6144
000 algorithm IKE dh group: id=18, name=OAKLEY_GROUP_MODP8192, bits=8192
000 algorithm IKE dh group: id=22, name=OAKLEY_GROUP_DH22, bits=1024
000 algorithm IKE dh group: id=23, name=OAKLEY_GROUP_DH23, bits=2048
000 algorithm IKE dh group: id=24, name=OAKLEY_GROUP_DH24, bits=2048
000
000 stats db_ops: {curr_cnt, total_cnt, maxsz} :context={0,2,64} trans={0,2,3072} attrs={0,2,2048}
000
000 "test": 10.28.1.0/24===192.168.1.3[@left]---192.168.1.1...192.168.1.1---192.168.1.13[@right]===10.28.2.0/24; erouted; eroute owner: #4
000 "test": myip=192.168.1.3; hisip=192.168.1.13;
000 "test": keys: 1:8F4C 47D1 466A 6F7C C469 B04C 9525 1F9B E69A E022 2:none...
000 "test": ....1:AD25 3E8F B131 F1DB 5926 B2C9 CCF1 2D3E A9D7 858D 2:none
000 "test": ike_life: 86400s; ipsec_life: 3600s; rekey_margin: 540s; rekey_fuzz: 100%; keyingtries: 0
000 "test": policy: RSASIG+ENCRYPT+TUNNEL+UP+IKEv2ALLOW+SAREFTRACK; prio: 24,24; interface: ens33; kind=CK_PERMANENT
000 "test": newest ISAKMP SA: #1; newest IPsec SA: #4; eroute owner: #4;
000 "test": IKE algorithms wanted: AES_CBC(7)_128-SHA1(2)_000-MODP1024(2); flags=-strict
000 "test": IKE algorithms found: AES_CBC(7)_128-SHA1(2)_160-MODP1024(2)
000 "test": IKE algorithm newest: AES_CBC_128-SHA1-MODP1024
000 "test": ESP algorithms wanted: AES(12)_128-SHA1(2)_000; flags=-strict
000 "test": ESP algorithms loaded: AES(12)_128-SHA1(2)_160
000 "test": ESP algorithm newest: AES_128-HMAC_SHA1; pfsgroup=<N/A>
000
000 #3: "test":500 IKEv1.0 STATE_QUICK_R2 (IPsec SA established); EVENT_SA_REPLACE in 3207s; isakmp#2; idle; import:not set
000 #3: "test" esp.4476710a@192.168.1.13 esp.aaa03819@192.168.1.3 tun.0@192.168.1.13 tun.0@192.168.1.3 ref=0 refhim=4294901761
000 #2: "test":500 IKEv1.0 STATE_MAIN_R3 (sent MR3, ISAKMP SA established); EVENT_SA_REPLACE in 86007s; lastdpd=-1s(seq in:0 out:0); idle; import:not set
000 #4: "test":500 IKEv1.0 STATE_QUICK_I2 (sent QI2, IPsec SA established); EVENT_SA_REPLACE in 2940s; newest IPSEC; eroute owner; isakmp#1; idle; import:admin initiate
000 #4: "test" esp.5863f7d3@192.168.1.13 esp.f2d719f9@192.168.1.3 tun.0@192.168.1.13 tun.0@192.168.1.3 ref=0 refhim=4294901761
000 #1: "test":500 IKEv1.0 STATE_MAIN_I4 (ISAKMP SA established); EVENT_SA_REPLACE in 85579s; newest ISAKMP; lastdpd=-1s(seq in:0 out:0); idle; import:admin initiate
000
root@ubantu:/home#
从80行开始便是隧道协商信息。
日志信息如下：
root@ubantu:/var/log# cat pluto.log
Plutorun started on Fri May 1 15:06:45 CST 2020
adjusting ipsec.d to /etc/ipsec.d
Labelled IPsec not enabled; value 32001 ignored.
Starting Pluto (Openswan Version 2.6.51.5; Vendor ID OSW~|tYiWYsW) pid:25601
LEAK_DETECTIVE support [disabled]
OCF support for IKE [disabled]
SAref support [disabled]: Protocol not available
SAbind support [disabled]: Protocol not available
NSS support [disabled]
HAVE_STATSD notification support not compiled in
Setting NAT-Traversal port-4500 floating to on
port floating activation criteria nat_t=1/port_float=1
NAT-Traversal support [enabled]
using /dev/urandom as source of random entropy
ike_alg_register_enc(): Activating OAKLEY_AES_CBC: Ok (ret=0)
ike_alg_register_hash(): Activating OAKLEY_SHA2_512: Ok (ret=0)
ike_alg_register_hash(): Activating OAKLEY_SHA2_256: Ok (ret=0)
starting up 1 cryptographic helpers
started helper pid=25603 (fd:7)
Using Linux XFRM/NETKEY IPsec interface code on 5.3.0-51-generic
ike_alg_register_enc(): Activating aes_ccm_8: Ok (ret=0)
ike_alg_add(): ERROR: algo_type '0', algo_id '0', Algorithm type already exists
ike_alg_register_enc(): Activating aes_ccm_12: FAILED (ret=-17)
ike_alg_add(): ERROR: algo_type '0', algo_id '0', Algorithm type already exists
ike_alg_register_enc(): Activating aes_ccm_16: FAILED (ret=-17)
ike_alg_add(): ERROR: algo_type '0', algo_id '0', Algorithm type already exists
ike_alg_register_enc(): Activating aes_gcm_8: FAILED (ret=-17)
ike_alg_add(): ERROR: algo_type '0', algo_id '0', Algorithm type already exists
ike_alg_register_enc(): Activating aes_gcm_12: FAILED (ret=-17)
ike_alg_add(): ERROR: algo_type '0', algo_id '0', Algorithm type already exists
ike_alg_register_enc(): Activating aes_gcm_16: FAILED (ret=-17)
using /dev/urandom as source of random entropy
loaded key: 8F4C 47D1 466A 6F7C C469 B04C 9525 1F9B E69A E022
loaded key: AD25 3E8F B131 F1DB 5926 B2C9 CCF1 2D3E A9D7 858D
use keyid: 1:8F4C 47D1 466A 6F7C C469 B04C 9525 1F9B E69A E022 / 2:<>
use keyid: 1:AD25 3E8F B131 F1DB 5926 B2C9 CCF1 2D3E A9D7 858D / 2:<>
adding connection: "test"
listening for IKE messages
adding interface ens33/ens33 192.168.1.3:500 (AF_INET)
adding interface ens33/ens33 192.168.1.3:4500
adding interface lo/lo 127.0.0.1:500 (AF_INET)
adding interface lo/lo 127.0.0.1:4500
adding interface lo/lo ::1:500 (AF_INET6)
adding interface ens33/ens33 2409:8a00:18eb:2b00:cdca:7d9:32ac:4d08:500 (AF_INET6)
adding interface ens33/ens33 2409:8a00:18eb:2b00:69e6:ab5c:116a:da03:500 (AF_INET6)
loading secrets from "/etc/ipsec.secrets"
loaded private key for keyid: PPK_RSA:AQPGLAfkE/8F4C 47D1 466A 6F7C C469 B04C 9525 1F9B E69A E022
| creating SPD to 192.168.1.3->spi=00000104@0.0.0.0 proto=61
| creating SPD to 192.168.1.3->spi=00000104@0.0.0.0 proto=61
"test" #1: initiating Main Mode
"test" #1: ERROR: asynchronous network error report on ens33 (sport=500) for message to 192.168.1.13 port 500, complainant 192.168.1.13: Connection refused [errno 111, origin ICMP type 3 code 3 (not authenticated)]
"test" #1: ERROR: asynchronous network error report on ens33 (sport=500) for message to 192.168.1.13 port 500, complainant 192.168.1.13: Connection refused [errno 111, origin ICMP type 3 code 3 (not authenticated)]
"test" #1: ERROR: asynchronous network error report on ens33 (sport=500) for message to 192.168.1.13 port 500, complainant 192.168.1.13: Connection refused [errno 111, origin ICMP type 3 code 3 (not authenticated)]
"test" #1: ERROR: asynchronous network error report on ens33 (sport=500) for message to 192.168.1.13 port 500, complainant 192.168.1.13: Connection refused [errno 111, origin ICMP type 3 code 3 (not authenticated)]
"test" #1: ERROR: asynchronous network error report on ens33 (sport=500) for message to 192.168.1.13 port 500, complainant 192.168.1.13: Connection refused [errno 111, origin ICMP type 3 code 3 (not authenticated)]
pending Quick Mode with 192.168.1.13 "test" took too long -- replacing phase 1
"test" #1: ERROR: asynchronous network error report on ens33 (sport=500) for message to 192.168.1.13 port 500, complainant 192.168.1.13: Connection refused [errno 111, origin ICMP type 3 code 3 (not authenticated)]
packet from 192.168.1.13:500: received Vendor ID payload [Openswan (this version) 2.6.51.5 ]
packet from 192.168.1.13:500: received Vendor ID payload [Dead Peer Detection]
packet from 192.168.1.13:500: received Vendor ID payload [RFC 3947] method set to=115
packet from 192.168.1.13:500: received Vendor ID payload [draft-ietf-ipsec-nat-t-ike-03] meth=108, but already using method 115
packet from 192.168.1.13:500: received Vendor ID payload [draft-ietf-ipsec-nat-t-ike-02_n] meth=106, but already using method 115
packet from 192.168.1.13:500: received Vendor ID payload [draft-ietf-ipsec-nat-t-ike-02] meth=107, but already using method 115
packet from 192.168.1.13:500: received Vendor ID payload [draft-ietf-ipsec-nat-t-ike-00]
"test" #2: responding to Main Mode
"test" #2: transition from state STATE_MAIN_R0 to state STATE_MAIN_R1
"test" #2: STATE_MAIN_R1: sent MR1, expecting MI2
"test" #2: NAT-Traversal: Result using draft-ietf-ipsec-nat-t-ike (MacOS X): no NAT detected
"test" #2: transition from state STATE_MAIN_R1 to state STATE_MAIN_R2
"test" #2: STATE_MAIN_R2: sent MR2, expecting MI3
| WARNING: /usr/src/openswan-2.6.51.5/programs/pluto/crypt_start_dh.c:160: encryptor 'aes' expects keylen 16/128, SA #2 INITIATOR keylen is 20
| WARNING: /usr/src/openswan-2.6.51.5/programs/pluto/crypt_start_dh.c:160: encryptor 'aes' expects keylen 16/128, SA #2 RESPONDER keylen is 0
| WARNING: /usr/src/openswan-2.6.51.5/programs/pluto/ikev1_main.c:1206: encryptor 'aes' expects keylen 16/128, SA #2 INITIATOR keylen is 20
| WARNING: /usr/src/openswan-2.6.51.5/programs/pluto/ikev1_main.c:1206: encryptor 'aes' expects keylen 16/128, SA #2 RESPONDER keylen is 0
"test" #2: Main mode peer ID is ID_FQDN: '@right'
"test" #2: transition from state STATE_MAIN_R2 to state STATE_MAIN_R3
"test" #2: STATE_MAIN_R3: sent MR3, ISAKMP SA established {auth=OAKLEY_RSA_SIG oursig= theirsig=AQOzIeXfR cipher=aes_128 prf=oakley_sha group=modp1024}
"test" #2: the peer proposed: 10.28.1.0/24:0/0 -> 10.28.2.0/24:0/0
"test" #3: responding to Quick Mode proposal {msgid:d7a7bc25}
"test" #3: us: 10.28.1.0/24===192.168.1.3[@left]---192.168.1.1
"test" #3: them: 192.168.1.1---192.168.1.13[@right]===10.28.2.0/24
| creating SPD to 192.168.1.13->spi=00010000@192.168.1.3 proto=4
"test" #3: transition from state STATE_QUICK_R0 to state STATE_QUICK_R1
"test" #3: STATE_QUICK_R1: sent QR1, inbound IPsec SA installed, expecting QI2
| creating SPD to 192.168.1.3->spi=00000000@192.168.1.13 proto=4
"test" #3: transition from state STATE_QUICK_R1 to state STATE_QUICK_R2
"test" #3: STATE_QUICK_R2: IPsec SA established tunnel mode {ESP=>0x4476710a <0xaaa03819 xfrm=AES_128-HMAC_SHA1 NATOA=none NATD=none DPD=none}
"test" #1: received Vendor ID payload [Openswan (this version) 2.6.51.5 ]
"test" #1: received Vendor ID payload [Dead Peer Detection]
"test" #1: received Vendor ID payload [RFC 3947] method set to=115
"test" #1: enabling possible NAT-traversal with method RFC 3947 (NAT-Traversal)
"test" #1: transition from state STATE_MAIN_I1 to state STATE_MAIN_I2
"test" #1: STATE_MAIN_I2: sent MI2, expecting MR2
| WARNING: /usr/src/openswan-2.6.51.5/programs/pluto/crypt_start_dh.c:160: encryptor 'aes' expects keylen 16/128, SA #1 INITIATOR keylen is 20
| WARNING: /usr/src/openswan-2.6.51.5/programs/pluto/crypt_start_dh.c:160: encryptor 'aes' expects keylen 16/128, SA #1 RESPONDER keylen is 0
"test" #1: NAT-Traversal: Result using draft-ietf-ipsec-nat-t-ike (MacOS X): no NAT detected
"test" #1: transition from state STATE_MAIN_I2 to state STATE_MAIN_I3
"test" #1: STATE_MAIN_I3: sent MI3, expecting MR3
"test" #1: received Vendor ID payload [CAN-IKEv2]
"test" #1: Main mode peer ID is ID_FQDN: '@right'
"test" #1: transition from state STATE_MAIN_I3 to state STATE_MAIN_I4
"test" #1: STATE_MAIN_I4: ISAKMP SA established {auth=OAKLEY_RSA_SIG oursig= theirsig=AQOzIeXfR cipher=aes_128 prf=oakley_sha group=modp1024}
"test" #4: initiating Quick Mode RSASIG+ENCRYPT+TUNNEL+UP+IKEv2ALLOW+SAREFTRACK {using isakmp#1 msgid:e65ec697 proposal=AES(12)_128-SHA1(2)_160 pfsgroup=no-pfs}
| creating SPD to 192.168.1.3->spi=00000000@192.168.1.13 proto=4
"test" #4: transition from state STATE_QUICK_I1 to state STATE_QUICK_I2
"test" #4: STATE_QUICK_I2: sent QI2, IPsec SA established tunnel mode {ESP=>0x5863f7d3 <0xf2d719f9 xfrm=AES_128-HMAC_SHA1 NATOA=none NATD=none DPD=none}
root@ubantu:/var/log#
至此，openswan才是真的编译、安装、环境搭建完毕。
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