Question about forwarding ports on cisco router

[bluesdoggy]

I need to do the following on a 1600 series cisco router (T1 external interface).

Forward TCP port 22 from external ip to internal but only for traffic originating from external ip range 204.110.225.0/24

Forward UDP port 500 in/out bound from external ip to internal

Forward protocl 50 (ESP) in/out bound from external ip to internal.

I fairly experienced with general networking, but i'm still learning my way around cisco boxes, i know how to do a static nat of an external to internal ip... but i'm not sure how to do specific port forwarding like this..especially the first part where i want to only allow originating traffic from a specific range.

Help?

 

[cburwell]

Did you ever figure this out? I am intererested in how to setup for forwarding on a 2600 series router, although I just want to do standard forwarding without worrying about the source address.

 

[Malk-a-mite]

but i'm not sure how to do specific port forwarding like this..especially the first part where i want to only allow originating traffic from a specific range.

Look up access control lists (ACLs).

Humorous version:
http://www.routergod.com/donking/

Newbie version:
http://www.networkclue.com/routing/Cisco/access-lists/index.aspx

Cisco documentation version:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios113ed/113ed_cr/secur_c/scprt3/scacls.htm

Did you ever figure this out? I am intererested in how to setup for forwarding on a 2600 series router, although I just want to do standard forwarding without worrying about the source address.

Same method.