GRE packets are similar in some respects to TCP segments. They both may carry a sequence number and acknowledgement number. But GRE is not TCP, all I can suggest is that you deny the two hosts that are communication with GRE from NAT and hope that it will just be routed through if that is possible. Other then that i don't know what to suggest. good luck
Does GRE need to be allowed in and out? I know that I have a working instance at another location that is setup one to one and I am allowing gre in and 1723 in and everything is working fine. All IP from that host is allowed out but GRE is not specifically allowed. Is GRE somehow separate in one instance but included in IP in another?
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.