转载注明来源: 来自，写于 2019-04-14.
有a, b, c 三台客户机，通过ppp虚拟拨号连接到服务器。
发现a, b, c分别能访问服务器，但a,b,c之间不能互访，不能互ping，即使ppp的ip都配置到一个网段。
经过反复测试，解决问题，a,b,c之间可以互相ping通，互相访问了。
以下是配置的关键点：
我要评论#!/bin/sh -e
# debain: copy this file to "/etc/ppp/ip-up.d/" , and chmod +x file.
# centos: append this lines to "/etc/ppp/ip-up.d/ip-up.local" , and chmod +x ip-up.local
# openwrt:append this lines to "/etc/ppp/ip-up" , and chmod +x ip-up
# ppp_iface="$1", ppp_local="$4", ppp_remote="$5"
if [ "$5" = "192.168.33.2" ]; then
/sbin/ip route add 192.168.33.0/24 via $5 dev $1
fi
exit 0
----完----
以下是几个脚本的备份。
# server
visudo:
vpn all=(root) nopasswd: /usr/sbin/pppd
vpn-shell
#!/bin/sh # vpn-shell , server #echo "$*" >> /home/vpn/log if [ -z "$*" ];then echo 'login succeed.' exit 0 fi a="`expr "$*" : '-c /usr/bin/sudo /usr/sbin/pppd '`" b="`expr "$*" : '-c /usr/sbin/ppp -direct '`" g="`expr "$*" : '-c sudo /usr/sbin/pppd '`" h="`expr "$*" : '-c /usr/sbin/pppd '`" if [ "$a" = "32" -o "$b" = "25" -o "$g" = "23" -o "$h" = "18" ] ;then a="`expr "$*" : '-c \(.*\)'`" # eval "$a" exec $a # echo "$a" fi exit 0 logout
vpn-pppssh.sh
#!/bin/sh
# vpn-pppssh.sh , client
#### check hostkey in file ".ssh/known_hosts" #####
link_name=my-ppp-vpn
link_peer_name=my-ppp-vpn
server_hostname=6.6.6.6
server_username=vpn
server_ifipaddr=192.168.33.1 #fix ip
client_ifipaddr=192.168.33.7
local_ssh_opts="-p"
path=/usr/local/sbin:/sbin:/bin:/usr/sbin:/usr/bin:/usr/bin/x11/:
pppd=/usr/sbin/pppd
ssh=/usr/bin/ssh
if ! test -f $pppd ; then echo "can't find $pppd"; exit 3; fi
if ! test -f $ssh ; then echo "can't find $ssh"; exit 4; fi
case "$1" in
start)
# echo -n "starting vpn to $server_hostname: "
${pppd} ipparam ${link_name} updetach noauth passive pty "${ssh} ${local_ssh_opts} ${server_hostname} -t -l${server_username} -p 443 -o batchmode=yes /usr/bin/sudo ${pppd} nodetach noauth ipparam ${link_peer_name} idle 3700" ${client_ifipaddr}:${server_ifipaddr} nodefaultroute idle 1800 connect-delay 8000
# echo "connected."
;;
stop)
# echo -n "stopping vpn to $server_hostname: "
pid=`ps ax | grep "${pppd} ipparam ${link_name} updetach noauth passive" | grep -v 'grep ' | awk '{print $1}'`
if [ "${pid}" != "" ]; then
kill $pid
echo "disconnected."
else
echo "failed to find pid for the connection"
fi
;;
config)
echo "link_name=$link_name"
echo "link_peer_name=$link_peer_name"
echo "server_hostname=$server_hostname"
echo "server_username=$server_username"
echo "server_ifipaddr=$server_ifipaddr"
echo "client_ifipaddr=$client_ifipaddr"
;;
*)
echo "usage: vpn-pppssh {start|stop|config}"
exit 1
;;
esac
exit 0
转载注明来源: 来自.
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