PPTP passthrough on 1841

Unanswered Question
Jul 27th, 2010
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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.

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Reza Sharifi Tue, 07/27/2010 - 17:57
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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

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