I will admit I am very confused given lack of concrete information available regarding IPSec and NAT.
Is it possible to configure an IPSec VPN behind a NAT router (Cisco 1700)?
I'm currently running an ISA 2006 VPN server and I have no issues connecting to it within the infrastructure (IPSec using pre-shared keys). However I can't reach the server from the outside.
I'm currently using this commands to forward and open up port UDP 500.
ip nat inside source static 192.168.111.33 209.x.x.100
access-list 111 permit udp any host 209.x.x.100 eq isakmp
Is this configuration even possible through a Cisco 1700? Or must I use PPTP (port 1723)? FYI, the router supports its own VPN but I was wanting to use ISA as it gives me more control in my particular org.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...