• Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 476
  • Last Modified:

VPN doesn't work since changing ISP's

We had an existing VPN working properly.  We since have changed ISPs.  I changed the Outside IP address and Route on the PIX 506e router at the main site to connect to the new ISP.  Internet service at the main site works fine.  I then change the VPN client server IP address on the client PIX 501.  Client sites also have Internet service that work fine.  The problem is the VPN tunnel does not work anymore.  Also cannot get into the PIX 506e at the main site anymore through SSH (outside).  Any Ideas what happened.

1 Solution
dupont2406Author Commented:
Also the VPN Tunnel light is on the the pix 501 client
You will want to check with the ISP to find out what ports they allow and compare to the ports you are using for your VPN.
At the main site you will need to change the IP address and route.
At the other site you will need to update the IP address of the peer VPN server in the 'crypto map' command and the 'isakmp key' command.

You will also want to run the 'clear crypto sa' command (or reboot the pix) at both ends so the old vpn information is reset other it can cause problems with the new settings.
ya try a reboot as grblades has said as i have seen this causing problems before
Your new ISP may use a diferent size MTU, that might be worth a look.

Featured Post

Prepare for an Exciting Career in Cybersecurity

Help prevent cyber-threats and provide solutions to safeguard our global digital economy. Earn your MS in Cybersecurity. WGU’s MSCSIA degree program curriculum features two internationally recognized certifications from the EC-Council at no additional time or cost.

Tackle projects and never again get stuck behind a technical roadblock.
Join Now