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I am having trouble connecting to a L2TP IPSec VPN when I use my wireless router. I have a LinkSys WRT54GL v1.1 wireless router with the most current version of tomato (1.28).
I have no issues connecting to the VPN server when I connect directly to the modem. I am using Windows 7 and its built-in VPN client.
Any ideas?
Johnny
Posted 2011-04-22T02:35:42.963
Reputation: 21
1
Enable the router's "VPN Passthrough" feature, which should be in the Advanced settings somewhere.
Of course, if you'd like to (or need to) get away from IPSec, I highly recommend OpenVPN which works without the need to enable the "VPN Passthrough" option:
OpenVPN (free, open source, userland VPN solution)
http://www.openvpn.net/index.php/open-source.html
Randolf Richardson
Posted 2011-04-22T02:35:42.963
Reputation: 14 002
0
No problem,
VPN passthrough just opens up your firewall with these options for IPSEC.
You need firewall rules to allow udp dest ports 500 & 1701. protocol gre/esp & ah in.
In iptables it would basically be this:
iptables -A FORWARD -p udp -m multiport --dports 500,1701 -j ACCEPT
iptables -A FORWARD -p gre -j ACCEPT
iptables -A FORWARD -p esp -j ACCEPT
iptables -A FORWARD -p ah -j ACCEPT
Of course that allows anyone to access your VPN potentially, so I'd recommend you filter that further by IP range if you can.
Matt H
Posted 2011-04-22T02:35:42.963
Reputation: 3 823
I am using Tomato there is no vpn passthrough option – Johnny – 2011-04-30T04:38:13.953
If IPSec is not supported, then a solution like the one that OpenVPN provides will be needed. IPSec works differently than most applications, which is why special support by routers may be needed. – Randolf Richardson – 2011-05-02T05:16:14.337
OpenVPN is great. Just not built into windows by default. But easily obtained and installed. – Matt H – 2013-02-11T20:23:16.160