hi,I have setup a site-to-site IPSec VPN between two cisco routers with Static public IPs. I notice that i can use hostnames instead IPs for cases with point-to-multipoint or Dynamic IPs. In that cases i can use this commands to setup VPN:(config)#cr...

hi,I have a problem. In the picture i have implement IPSec VPN through Routers A, D (Backup Link). The second picture is more detailed showing the same network. I have primary link between E and F through Leased Line. When leased line goes down, Rout...

Hi,I have seen all capabilities/combinations of IPsec with different security algorithms and modes, but i have the question, how much overhead is added finally to a packet and how this effects MTU (eg MTU for Ethernet frame is 1400 Bytes ) on each ca...

NAT Traversal performs two tasks: it detects if both ends support NAT-T and NAT-Discovery that detects NAT devices along the transmission path.NAT-D payload  is a hash of the original IP and port. Devices exchange two NAT-D packets, one with source I...