L2TP
Server
Installation
apt-get install xl2tpd ppp openswan
Openswan
cat /etc/ipsec.conf version 2.0 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 authby=secret pfs=no auto=add type=transport left=XXX.XXX.XXX.XXX leftprotoport=17/1701 right=%any rightprotoport=17/%any
cat /etc/ipsec.secrets XXX.XXX.XXX.XXX %any : PSK "1234"
XL2TP
cat /etc/xl2tpd/xl2tpd.conf
[global] ipsec saref = yes [lns default] ip range = 10.1.2.2-10.1.2.255 local ip = 10.1.2.1 refuse chap = yes refuse pap = yes require authentication = yes ppp debug = yes pppoptfile = /etc/ppp/options.xl2tpd length bit = yes
PPP
cat /etc/ppp/options.xl2tpd require-mschap-v2 ms-dns 192.168.240.21 ms-dns 192.168.240.22 asyncmap 0 auth crtscts lock hide-password modem debug name l2tpd proxyarp lcp-echo-interval 30 lcp-echo-failure 4
cat /etc/ppp/chap-secrets xinux l2tpd "geheimes-passwort" * l2tpd xinux "geheimes-passwort" *
Client
Installation
apt-get install xl2tpd ppp openswan
ipsec
cat /etc/ipsec.conf version 2.0 # conforms to second version of ipsec.conf specification config setup dumpdir=/var/run/pluto/ protostack=netkey nat_traversal=yes 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=off conn yourconn authby=secret pfs=no auto=add keyingtries=3 dpddelay=30 dpdtimeout=120 dpdaction=clear rekey=yes ikelifetime=8h keylife=1h type=transport left=%defaultroute leftprotoport=17/1701 right=yourhost.com rightprotoport=17/1701
Start Script
#!/bin/bash case $1 in start) /etc/init.d/ipsec restart sleep 1 ipsec auto --up yourconn sleep 1 /etc/init.d/xl2tpd start sleep 1 echo "c vpn-connection" > /var/run/xl2tpd/l2tp-control sleep 5 ip route add 192.168.240.0/21 via 172.28.6.1 ;; stop) ip route del 192.168.240.0/21 echo "d vpn-connection" > /var/run/xl2tpd/l2tp-control /etc/init.d/xl2tpd stop ipsec auto --down yourconn /etc/init.d/ipsec stop ;; esac
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