Posted: Sat Jul 21, 2012 16:56 Post subject: Best way to bridge two locations that have static IPs
I need to bridge (TAP?) two locations together for 3 weeks. It needs to be completely transparent so that the 192.168.200 network works just like it does now at one location. Both locations have Comcast business class service with static IPs and a subnet of 255.255.255.248. The new location also has CenturyLink business DSL service with static IPs so that I can test at one location. I have 2 WRT54G Linksys routers (V3 and V4) that already have DD-WRT installed (VPN build 14896 of 2010-08-09).
I've tried PPTP but can't get that working. After much research everything I find is either very old with scripts or there are comments that it doesn't work. Can someone either post a link to a definitive article on this, or send me their documentation with screen shots of their setup?
I would make one suggestion about this article when trying to implement, is make the subnet bigger a /23 or /22 instead of one /24,
This would allow you to keep track of he IP addresses easier, and still keep the same default gateway.
192.168.0.0-192.168.3.255 would be a /22
Giving location 1 192.168.1.x IP addresses and location 2 192.168.2.x IP addresses, but the default gateway would still be 192.168.1.1 or 192.168.0.1 whatever you want.
And continue with the DHCP blocking part from that link.
Or, only run 1 DHCP server, in which case you would not want to follow the DHCP blocking part.
Unless you are really focused on wanting PPTP, OpenVPN may be exactly what you need.
Setting up 'remote management' even if the VPN is down, using the WAN IP you can still manage the device and make changes, even if the LAN side configuration is 'broken'.
I did this while while fighting with my own VPN issues at the remote site.