Im struggling to get traffic from inside the lan to hit the router, and be redirected when hitting that external IP address just like outside clients would.
if my site was foobar.dyndns.org:
foobar.dyndns.org:443 - 192.168.1.2:443
foobar.dyndns.org:8080 - 192.168.1.3:80
foobar.dydnds.org:3389 - 192.168.1.4: 3389
On the outside, that works as expected. but from inside, connections cannot be established.
My setup:
cisco 1721 router (router on a stick config)
Cisco 2950 switch
cisco 1241 AP
1721 has 3 sub interfaces configured:
0.2 - to the internet (vlan 2)
0.3 - to the wired network (192.168.1.0/24) (vlan 3)
0.4 - to the wireless network (192.168.2.0/24) (vlan 4)
currently I have a blanket allow for nat traversing from any inside source to fa0.2 (overload) to allow outbound traffic to the internet
then I have a few specific nat statements for port address translation to various hosts on vlan 3
my external address is dynamic, so Im mapping the wan interface on the switch for all of my translations.
This works great when Im outside the network connecting to the hosted services via a dyanmic DNS hostname. However when I reference that host from inside the network, the DNS lookup works fine, but the traffic is not routed to the appropriate internal resource. Since I have but 1 external internet address and the port translations are spanned across multiple hosts internally, rewriting DNS for that zone is not an option. Im not sure how to write the nat statment(s) needed to allow for this internal traffic to hit the router and be translated appropriately coming back in. My cheapo E2000 and WRT54gl routers handled this without any configuration, so Im sure its doable, I just need a hint to move in the right direction.
Thanks!
Additionally, if this type of communication has a proper name, can someone educate me on it? I was struggling with fruitless searches before I finally decided to break down and ask.
