problem with VPN GRE and IOS Firewall

Answered Question
Jan 6th, 2010

Hello. I have a problem with a Cisco 2800 Router. I can't connect from the inside network to outside using a GRE VPN client (MS). I did a packet capture and responses are coming on the outside interface but they never reach the inside interface. I allowed both IP protocol 47 and TCP 1723. I've attached the running config. Please help.

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Correct Answer by Claudiu Boar about 7 years 2 weeks ago
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fbhura Thu, 01/07/2010 - 20:34

hi ,

     you would require that you open up GREon the outside interface.

access-list ex 199 permit gre any any

that should take care of it.

Faisal Bhura

sergiu.campian Thu, 01/07/2010 - 23:15

It doesn't work with the acl only, but the method described in the link above with the inspection policy did the trick. Thanks.

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