topic Re: GRE\IP Tunnels between Cisco Router and PIX in Network Security https://community.cisco.com/t5/network-security/gre-ip-tunnels-between-cisco-router-and-pix/m-p/143650#M622557 <HTML><HEAD></HEAD><BODY><P>Hello</P><P></P><P>You cannot terminate GRE onto a pix, but as the last reply said you can pass GRE tunnels through a PIX, which is a far as I am aware is the only way to pass OSPF/EIGRP routing information and non IP traffic through an IPSec VPN terminated on a PIX as IPSec does not support non IP traffic or the multicast hellos of these routing protocols. So I think in some circumstances GRE through the PIX is useful.</P><P></P><P>Cheers</P><P></P><P>ps For some reason GRE information has become more difficult to find since the website has changed</P></BODY></HTML> Tue, 03 Dec 2002 08:06:41 GMT dean_holroyd 2002-12-03T08:06:41Z GRE\IP Tunnels between Cisco Router and PIX https://community.cisco.com/t5/network-security/gre-ip-tunnels-between-cisco-router-and-pix/m-p/143648#M622555 <P>Hi,</P><P>Is it possible to establish GRE\IP (no IPSec) between a Cisco IOS router and PIX ? Is there any document i can refer to ?</P><P></P><P>Regards \\ Naman</P> Fri, 21 Feb 2020 06:24:28 GMT https://community.cisco.com/t5/network-security/gre-ip-tunnels-between-cisco-router-and-pix/m-p/143648#M622555 mnlatif 2020-02-21T06:24:28Z Re: GRE\IP Tunnels between Cisco Router and PIX https://community.cisco.com/t5/network-security/gre-ip-tunnels-between-cisco-router-and-pix/m-p/143649#M622556 <HTML><HEAD></HEAD><BODY><P>The PIX won't terminate a GRE tunnel specifically. You can pass a GRE tunnel THROUGH a PIX and terminate it on an inside router, although not something I'd probably recommend.</P><P></P><P>If you do want to do that, you have to assign a static translation for the inside router interface, then just allow IP protocol 47 through from IPSec peer to that static address. </P></BODY></HTML> Tue, 03 Dec 2002 00:13:08 GMT https://community.cisco.com/t5/network-security/gre-ip-tunnels-between-cisco-router-and-pix/m-p/143649#M622556 gfullage 2002-12-03T00:13:08Z Re: GRE\IP Tunnels between Cisco Router and PIX https://community.cisco.com/t5/network-security/gre-ip-tunnels-between-cisco-router-and-pix/m-p/143650#M622557 <HTML><HEAD></HEAD><BODY><P>Hello</P><P></P><P>You cannot terminate GRE onto a pix, but as the last reply said you can pass GRE tunnels through a PIX, which is a far as I am aware is the only way to pass OSPF/EIGRP routing information and non IP traffic through an IPSec VPN terminated on a PIX as IPSec does not support non IP traffic or the multicast hellos of these routing protocols. So I think in some circumstances GRE through the PIX is useful.</P><P></P><P>Cheers</P><P></P><P>ps For some reason GRE information has become more difficult to find since the website has changed</P></BODY></HTML> Tue, 03 Dec 2002 08:06:41 GMT https://community.cisco.com/t5/network-security/gre-ip-tunnels-between-cisco-router-and-pix/m-p/143650#M622557 dean_holroyd 2002-12-03T08:06:41Z Re: GRE\IP Tunnels between Cisco Router and PIX https://community.cisco.com/t5/network-security/gre-ip-tunnels-between-cisco-router-and-pix/m-p/143651#M622558 <HTML><HEAD></HEAD><BODY><P>Thank you very much.</P></BODY></HTML> Tue, 03 Dec 2002 15:38:12 GMT https://community.cisco.com/t5/network-security/gre-ip-tunnels-between-cisco-router-and-pix/m-p/143651#M622558 mnlatif 2002-12-03T15:38:12Z