0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395  ipsec ***
ipsec ***
时间: 分类:技术博客

指采用IPSec协议来实现远程接入的一种***技术,IPSec全称为Internet Protocol Security,是由Internet Engineering Task Force (IETF) 定义的安全标准框架,在公网上为两个私有网络提供安全通信通道,通过加密通道保证连接的安全——在两个公共网关间提供私密数据封包服务


实验环境

centos6.5_x64


实验软件

xl2tpd-1.3.8-1.el6.x86_64

ppp-2.4.5-11.el6_10.x86_64


软件安装

yum install -y make gcc gmp-devel xmlto bison flex xmlto libpcap-devel lsof

yum install -y openswan ppp xl2tpd


cp -pv /etc/ipsec.conf  /etc/ipsec.conf.bak

cat /etc/ipsec.conf

config setup

    nat_traversal=yes

    virtual_private=%v4:10.0.0.0/8,%v4:192.168.0.0/16,%v4:172.16.0.0/12

    oe=off

    protostack=netkey

 

conn L2TP-PSK-NAT

    rightsubnet=vhost:%priv

    also=L2TP-PSK-noNAT

 

conn L2TP-PSK-noNAT

    authby=secret

    pfs=no

    auto=add

    keyingtries=3

    rekey=no

    ikelifetime=8h

    keylife=1h

    type=transport

    left=192.168.10.16

    leftprotoport=17/1701

    right=%any

    rightprotoport=17/%any

cp -pv /etc/ipsec.secrets /etc/ipsec.secrets.bak

cat /etc/ipsec.secrets

include /etc/ipsec.d/*.secrets

192.168.10.16 %any: PSK "123456"


cp -pv /etc/sysctl.conf  /etc/sysctl.conf.bak

tail -n10 /etc/sysctl.conf

net.ipv4.ip_forward = 1

net.ipv4.conf.default.rp_filter = 0

net.ipv4.conf.all.send_redirects = 0

net.ipv4.conf.default.send_redirects = 0

net.ipv4.conf.all.log_martians = 0

net.ipv4.conf.default.log_martians = 0

net.ipv4.conf.default.accept_source_route = 0

net.ipv4.conf.all.accept_redirects = 0

net.ipv4.conf.default.accept_redirects = 0

net.ipv4.icmp_ignore_bogus_error_responses = 1

sysctl -p

echo "0" >  /proc/sys/net/ipv4/conf/lo/rp_filter

echo "0" >  /proc/sys/net/ipv4/conf/eth0/rp_filter


ipsec setup restart

ipsec verify

Verifying installed system and configuration files


Version check and ipsec on-path                    [OK]

Libreswan 3.15 (netkey) on 2.6.32-696.el6.x86_64

Checking for IPsec support in kernel              [OK]

 NETKEY: Testing XFRM related proc values

         ICMP default/send_redirects              [OK]

         ICMP default/accept_redirects            [OK]

         XFRM larval drop                          [OK]

Pluto ipsec.conf syntax                            [OK]

Hardware random device                            [N/A]

Checking rp_filter                                [OK]

Checking that pluto is running                    [OK]

 Pluto listening for IKE on udp 500                [OK]

 Pluto listening for IKE/NAT-T on udp 4500        [OK]

 Pluto ipsec.secret syntax                        [OK]

Checking 'ip' command                              [OK]

Checking 'iptables' command                        [OK]

Checking 'prelink' command does not interfere with FIPSChecking for obsolete ipsec.conf options          [OK]

Opportunistic Encryption                          [DISABLED]


cp -pv /etc/xl2tpd/xl2tpd.conf /etc/xl2tpd/xl2tpd.conf.bak

cat /etc/xl2tpd/xl2tpd.conf

[global]

listen-addr = 192.168.10.16 ;


[lns default]

ip range = 172.16.37.2-172.16.37.254 ;

local ip = 172.16.37.1 ;

refuse chap = yes

refuse pap = yes

require authentication = yes

ppp debug = yes

pppoptfile = /etc/ppp/options.xl2tpd

length bit = yes


cp -pv /etc/ppp/options.xl2tpd /etc/ppp/options.xl2tpd.bak

cat /etc/ppp/options.xl2tpd 

require-mschap-v2

ms-dns 8.8.8.8

ms-dns 8.8.4.4

asyncmap 0

auth

crtscts

lock

hide-password

modem

debug

name l2tpd

proxyarp

lcp-echo-interval 30

lcp-echo-failure 4


cp -pv /etc/ppp/chap-secrets /etc/ppp/chap-secrets.bak

cat /etc/ppp/chap-secrets

# Secrets for authentication using CHAP

# client server secret IP addresses

  test      *       123456          *

  

service xl2tpd restart && chkconfig --level 35 xl2tpd on

service ipsec restart  && chkconfig --level 35 ipsec on


netstat -tuplna | grep xl2tpd

udp        0      0 192.168.10.16:1701          0.0.0.0:*                               1524/xl2tpd  


ip addr | grep ppp

4: ppp0: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1400 qdisc pfifo_fast state UNKNOWN qlen 3

    link/ppp 

    inet 172.16.37.1 peer 172.16.37.2/32 scope global ppp0


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