topic Re: problem with VPN GRE and IOS Firewall in Network Security https://community.cisco.com/t5/network-security/problem-with-vpn-gre-and-ios-firewall/m-p/1407400#M768516 <HTML><HEAD></HEAD><BODY><P> hi ,</P><P>&nbsp;&nbsp;&nbsp;&nbsp; you would require that you open up GREon the outside interface.</P><P></P><P> access-list ex 199 permit gre any any </P><P></P><P></P><P> that should take care of it.</P><P></P><P></P><P></P><P>Faisal Bhura</P></BODY></HTML> Fri, 08 Jan 2010 04:34:51 GMT fbhura 2010-01-08T04:34:51Z problem with VPN GRE and IOS Firewall https://community.cisco.com/t5/network-security/problem-with-vpn-gre-and-ios-firewall/m-p/1407398#M768488 <P>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.</P> Mon, 11 Mar 2019 16:54:19 GMT https://community.cisco.com/t5/network-security/problem-with-vpn-gre-and-ios-firewall/m-p/1407398#M768488 sergiu.campian 2019-03-11T16:54:19Z Re: problem with VPN GRE and IOS Firewall https://community.cisco.com/t5/network-security/problem-with-vpn-gre-and-ios-firewall/m-p/1407399#M768493 <HTML><HEAD></HEAD><BODY><P>i found this usefull:</P><P><A class="jive-link-external-small" href="http://siskiyoutech.com/blog/?p=78">http://siskiyoutech.com/blog/?p=78</A></P></BODY></HTML> Thu, 07 Jan 2010 12:38:44 GMT https://community.cisco.com/t5/network-security/problem-with-vpn-gre-and-ios-firewall/m-p/1407399#M768493 Claudiu Boar 2010-01-07T12:38:44Z Re: problem with VPN GRE and IOS Firewall https://community.cisco.com/t5/network-security/problem-with-vpn-gre-and-ios-firewall/m-p/1407400#M768516 <HTML><HEAD></HEAD><BODY><P> hi ,</P><P>&nbsp;&nbsp;&nbsp;&nbsp; you would require that you open up GREon the outside interface.</P><P></P><P> access-list ex 199 permit gre any any </P><P></P><P></P><P> that should take care of it.</P><P></P><P></P><P></P><P>Faisal Bhura</P></BODY></HTML> Fri, 08 Jan 2010 04:34:51 GMT https://community.cisco.com/t5/network-security/problem-with-vpn-gre-and-ios-firewall/m-p/1407400#M768516 fbhura 2010-01-08T04:34:51Z Re: problem with VPN GRE and IOS Firewall https://community.cisco.com/t5/network-security/problem-with-vpn-gre-and-ios-firewall/m-p/1407401#M768522 <HTML><HEAD></HEAD><BODY><P>It doesn't w<SPAN style="background-color: #f8fafd;">ork with the acl only, but the method described in the link above with the inspection policy did the trick. Thanks.</SPAN></P></BODY></HTML> Fri, 08 Jan 2010 07:15:53 GMT https://community.cisco.com/t5/network-security/problem-with-vpn-gre-and-ios-firewall/m-p/1407401#M768522 sergiu.campian 2010-01-08T07:15:53Z