ipsec-tools安装教程

  • ipsec-tools最新版本为0.8.2,此处以0.7.3版本为例说明安装和使用过程。可参考ipsec-howto

安装步骤

ipsec-tools依赖于linux2.6版本内核,在安装ipsec-tools前需编译安装linux kernel 2.6,此处以2.6.34.1为例。

内核编译步骤
  1. 下载 linux-2.6.34.1.tar.bz2
  2. 将文件移动到 /usr/src/kernels/
    mv linux-2.6.34.1.tar.bz2 /usr/src/kernels/
  3. 解压 tar -jxvf linux-2.6.34.1.tar.bz2
  4. make menuconfig 导入加解密模块。
  • 报错: 'make menuconfig' requires the ncurses libraries.原因:在终端连接主机的情况下进行GUI菜单配置,缺失必要的包ncurses。
    解决方法:安装ncurses包,yum install ncurses-devel
    需加载或引入的模块如下:

    Networking support (NET) [Y/n/?] y
    *

    • Networking options

      PF_KEY sockets (NET_KEY) [Y/n/m/?] y

      IP: AH transformation (INET_AH) [Y/n/m/?] y

      IP: ESP transformation (INET_ESP) [Y/n/m/?] y

      IP: IPsec user configuration interface (XFRM_USER) [Y/n/m/?] y

    Cryptographic API (CRYPTO) [Y/n/?] y
    HMAC support (CRYPTO_HMAC) [Y/n/?] y
    Null algorithms (CRYPTO_NULL) [Y/n/m/?] y
    MD5 digest algorithm (CRYPTO_MD5) [Y/n/m/?] y
    SHA1 digest algorithm (CRYPTO_SHA1) [Y/n/m/?] y
    DES and Triple DES EDE cipher algorithms (CRYPTO_DES) [Y/n/m/?] y
    AES cipher algorithms (CRYPTO_AES) [Y/n/m/?] y

  1. make
  • 报错:gcc: error: elf_i386: No such file or directory
    原因:gcc 4.8不再支持linker-style架构。
    解决方法:im arch/x86/vdso/Makefile,找到DSO_LDFLAGS_vdso.lds = -m elf_x86_64,将-m elf_x86_64改为-m64,找到VDSO_LDFLAGS_vdso32.lds = -m elf_i386,将-m elf_i386改为-m32即可。
  • 报错:drivers/net/igbvf/igbvf.h:129:15: error: duplicate member ‘page’
    原因:gcc版本与内核版本冲突导致,gcc版本4.8不支持内核linux 2.6.34中在结构体和结构体外重复定义的方式。
    解决方法:更改内核源码 vim drivers/net/igbvf/igbvf.h,将129行的struct page *page改为struct page *pagep,重新编译。
  • 报错:Documentation/video4linux/v4lgrab.c:34:28: fatal error: linux/videodev.h: No such file or directory
    原因:缺失libv4l-devel包。
    解决方法:安装libv4l-devel包,yum install libv4l-devel,修改内核源码vim Documentation/video4linux/v4lgrab.c,将#include <linux/videodev.h>改为#include <libv4l1-videodev.h>,重新编译。
  1. make modules_install
  2. make install
    检查是否安装成功:awk -F\' '$1=="menuentry " {print i++ " : " $2}' /etc/grub2.cfg

    0 : CentOS Linux (2.6.34.1) 7 (Core)
    1 : CentOS Linux (3.10.0-693.21.1.el7.x86_64) 7 (Core)
    2 : CentOS Linux (3.10.0-514.el7.x86_64) 7 (Core)
    3 : CentOS Linux (0-rescue-6c250481a09c4f48a0b2432ad5b4c8b8) 7 (Core)
    出现CentOS Linux (2.6.34.1) 7 (Core)表明内核安装成功。

ipsec-tools安装步骤
  1. 下载ipsec-tools-0.7.3.tar.gz并解压。
  2. configure
    指定内核版本为2.6
    ./configure --with-kernel-headers=/lib/modules/2.6.34.1/build/include/
  • 报错:configure: error: OpenSSL version must be 0.9.6 or higher. Aborting.
    解决方法:yum install openssl-devel
  1. make
  • 报错:token.c:(.text+0xc6d): undefined reference to 'yywrap'
    解决方法:yum install flex flex-devel bison,然后重新configure,make。
  • 报错:ipsec_doi.c:1321:24: error: argument to ‘sizeof’ in ‘memset’ call is the same expression as the destination
    解决方法:vim src/racoon/ipsec_doi.c,将1321行memset(pair, 0, sizeof(pair));中的sizeof(pair)改为sizeof(*pair),重新make。
  • 报错:/usr/include/selinux/flask.h:5:2: error: #warning "Please remove any #include's of this header in your source code." [-Werror=cpp]
    解决方法:删除第5行的#warning注释,sed -i '5d' /usr/include/selinux/flask.h,后面的warning错误,解决方法相同。
  1. make install
    检查是否安装成功
    which setkey

    /usr/local/sbin/setkey
    which racoon
    /usr/local/sbin/racoon
    出现以上信息表示ipsec-tools安装成功

配置步骤

  • 假设主机A的IP为1.1.1.1,主机B的IP为2.2.2.1,且主机A、B可互相通信。
    配置文件:在root目录下创建3个文件
    1、psk.txt (两个主机配置相同)
1.1.1.1 testkey
2.2.2.2 testkey

2、setkey.conf
主机A:

#!/usr/sbin/setkey -f
flush;
spdflush;

spdadd 1.1.1.1/32[any] 2.2.2.1/32[any] any -P out ipsec
esp/tunnel/1.1.1.1-2.2.2.1/require;
spdadd 2.2.2.1/32[any] 1.1.1.1/32[any] any -P in ipsec
esp/tunnel/2.2.2.1-1.1.1.1/require;

主机B:

#!/usr/sbin/setkey -f
flush;
spdflush;

spdadd 2.2.2.1/32[any] 1.1.1.1/32[any] any -P out ipsec
esp/tunnel/2.2.2.1-1.1.1.1/require;
spdadd 1.1.1.1/32[any] 2.2.2.1/32[any] any -P in ipsec
esp/tunnel/1.1.1.1-2.2.2.1/require;

3、racoon.conf
主机A:

#!/usr/local/bin/racoon
path pre_shared_key "/root/psk.txt";
listen {
    isakmp 1.1.1.1 [500];
}
remote 2.2.2.1 {
    exchange_mode main, aggressive;
    my_identifier address 1.1.1.1;
    peers_identifier address 2.2.2.1;
    initial_contact on;
    proposal_check obey;
    proposal {
       encryption_algorithm aes 256;
       hash_algorithm md5;
       authentication_method pre_shared_key;
       dh_group 2;
    }
 }
sainfo address 1.1.1.1 any address 2.2.2.1 any{
    encryption_algorithm des;
    authentication_algorithm hmac_md5;
    compression_algorithm deflate;
}
sainfo address 2.2.2.1 any address 1.1.1.1 any{
    encryption_algorithm des;
    authentication_algorithm hmac_md5;
    compression_algorithm deflate;
}

主机B:

#!/usr/local/bin/racoon
path pre_shared_key "/root/psk.txt";
listen {
    isakmp 2.2.2.1 [500];
}
remote 1.1.1.1 {
    exchange_mode main, aggressive;
    my_identifier address 2.2.2.1;
    peers_identifier address 1.1.1.1;
    initial_contact on;
    proposal_check obey;
proposal {
    encryption_algorithm aes 256;
    hash_algorithm md5;
    authentication_method pre_shared_key;
    dh_group 2;
}
}
sainfo address 2.2.2.1 any address 1.1.1.1 any{
    encryption_algorithm des;
    authentication_algorithm hmac_md5;
    compression_algorithm deflate;
}

sainfo address 1.1.1.1 any address 2.2.2.1 any{
    encryption_algorithm des;
    authentication_algorithm hmac_md5;
    compression_algorithm deflate;
}

启动IPsec:
1、setkey setk.conf
此时使用setkey -DP命令可以看到SPD数据
2、/usr/local/sbin/racoon -f racoon.conf -ddddddd -l /tmp/ipsec-log.txt -v
可以在/tmp/ipsec-log.txt中查看日志,方便调试
测试:
在主机A上 ping 主机B,并在主机B上抓取esp报文
主机B:tcpdump -i eth0 -n src 1.1.1.1 and esp
主机A能ping通主机B,且在主机B上抓取到来自主机A的esp报文,说明隧道成功建立。

posted on 2018-05-11 18:50  LG一直在努力  阅读(1288)  评论(0编辑  收藏  举报

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