VPNC
From DD-WRT Wiki
(Difference between revisions)
Revision as of 16:02, 17 September 2007 (edit) Alain (Talk | contribs) (publication of my vpnc auto-reconnect script) ← Previous diff |
Revision as of 21:21, 21 September 2007 (edit) (undo) Alain (Talk | contribs) (→This page describes how to use DD-WRT to connect to a Cisco VPN Concentrator using vpnc.) Next diff → |
||
Line 1: | Line 1: | ||
== This page describes how to use DD-WRT to connect to a Cisco VPN Concentrator using vpnc. == | == This page describes how to use DD-WRT to connect to a Cisco VPN Concentrator using vpnc. == | ||
+ | |||
+ | vpnc is supposed to work with: | ||
+ | *Cisco VPN concentrator 3000 Series | ||
+ | *Cisco IOS routers | ||
+ | *Cisco PIX / ASA Zecurity Appliances | ||
+ | *Juniper/Netscreen | ||
+ | |||
There is currently no gui for this, but don't worry, it won't be complicated. | There is currently no gui for this, but don't worry, it won't be complicated. | ||
This script also automatically reconnects, if your vpn connection gets disconnected | This script also automatically reconnects, if your vpn connection gets disconnected | ||
+ | |||
+ | To let your router connect to the vpn concentrator and share the connection with its clients follow the steps below: | ||
#You need to flash DD-WRT VPN build after 08/18/07 (I recommend latest v24 vpn). | #You need to flash DD-WRT VPN build after 08/18/07 (I recommend latest v24 vpn). |
Revision as of 21:21, 21 September 2007
This page describes how to use DD-WRT to connect to a Cisco VPN Concentrator using vpnc.
vpnc is supposed to work with:
- Cisco VPN concentrator 3000 Series
- Cisco IOS routers
- Cisco PIX / ASA Zecurity Appliances
- Juniper/Netscreen
There is currently no gui for this, but don't worry, it won't be complicated.
This script also automatically reconnects, if your vpn connection gets disconnected
To let your router connect to the vpn concentrator and share the connection with its clients follow the steps below:
- You need to flash DD-WRT VPN build after 08/18/07 (I recommend latest v24 vpn).
- Paste the code below into a text editor and adjust line 5 - 11.
- Open a Webbrowser, type the IP of your router, then go to Administration -> Commands
- Paste the code adjusted in Step 2 into the commands box, then click 'Save Startup'
- Reboot your router
If everything worked fine, your router has now established a vpn tunnel.
If you have any comment or question on this, you can PM me in the DD-WRT Forum (Username: alain)
mkdir /tmp/etc/vpnc rm -f /tmp/etc/vpnc/vpnc.sh echo ' #!/bin/sh vpn_concentrator="host" ##enter ip or hostname of your Ipsec vpn concentrator vpn_keepalive_host1="keepalive1" ##enter the ip or hostname of a computer that should be reachable if vpn connection is established. vpn_keepalive_host2="keepalive2" ##enter the ip or hostname of a computer that should be reachable if vpn connection is established. vpn_groupname="grid" ##enter the group name here vpn_grouppasswd="grppasswd" ##enter the group password here vpn_username="username" ##enter your username here vpn_password="password" ##enter your password here #--do not edit this-- #Written by Alain R. (alainr [AT] gmx.de) 17.Sep.2007 rm -f /tmp/etc/vpnc/vpn.conf vpnc-disconnect echo " IPSec gateway $vpn_concentrator IPSec ID $vpn_groupname IPSec secret $vpn_grouppasswd Xauth username $vpn_username Xauth password $vpn_password " >> /tmp/etc/vpnc/vpn.conf pingtest1 () { ping -q -c1 $param1 >> /dev/null if [ "$?" == "0" ]; then echo 0 #reachable else echo 1 #not reachable fi } pingtest2 () { ping -q -c2 $param2 >> /dev/null if [ "$?" == "0" ]; then echo 0 #reachable else echo 1 #not reachable fi } while [ true ]; do param1=$vpn_concentrator; if [ "`pingtest1`" == "0" ]; then #Vpn concentrator reachable doloop=1; while [ $doloop -gt 0 ]; do param1=$vpn_keepalive_host1; if [ "`pingtest1`" == "0" ]; then sleep 300 else param2=$vpn_keepalive_host2; if [ "`pingtest2`" == "0" ]; then sleep 300 else doloop=0; vpnc-disconnect vpnc /tmp/etc/vpnc/vpn.conf sleep 1 tundev="`ifconfig |grep tun |cut -b 1-4`" iptables -A FORWARD -o $tundev -j ACCEPT iptables -A FORWARD -i $tundev -j ACCEPT iptables -t nat -A POSTROUTING -o $tundev -j MASQUERADE sleep 9 fi fi done else sleep 10; fi done return 0; ' >> /tmp/etc/vpnc/vpnc.sh chmod 700 /tmp/etc/vpnc/vpnc.sh /tmp/etc/vpnc/vpnc.sh&