I setup Cisco PIX 515 in my lab to test IPSec VPN. The PIX is behind a Linksys WRTP54G router and UDP port 500 is open. I can establish the VPN in the LAN, but I get not connected error if I test it from a remote office that is behind another PIX 515E. I am not sure the problem is the Linksys router or PIX in the office. Any suggestions?
The lab PIX configuration can be found here, http://www.howtonetworking.com/cisco/pixvpnsample.htm