07-27-2010 05:16 PM - edited 03-04-2019 09:13 AM
Hello,
I am behind a 1841 firewall and it seems that GRE is not configured to passthrough the router and is causing me issues connecting to Windows VPN. Can someone point me to a document or let me know what ports I need to open etc.
Thanks.
07-27-2010 05:57 PM
Hi Jeff,
I think for IPSEC over GRE tunnel ISAKMP utilizes UDP port 500. Try allowing it through the firewall and test again.
HTH
Reza
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide
Log in to Community