I have a private network located on a corporate network using a Cisco 851 W. I want to block all access to the coporate LAN from behind this firewall which will be used as an access point to provide internet access/ I have done this sucesfully with an ASA before but the router is proving more difficult.
I have this
192.168.1.0/24 --- 851W Router ---- 10.100.1.15 (Corporate LAN) --- 10.100.1.254 (Corporate Intenet GW)
On the ASA I was able to add false routes for each internal site, including the local site except the gateway. This worked fine.
I have tried via routes and it not working for the local site, so I though I would do this via an access list.
So I added this on the BVI1 "in"
access-list 150 deny ip 192.168.1.0 0.0.0.255 host 10.100.1.1 -253
However, all traffic is then blocked, ie I can't telnet, ping 192.168.1.254 which is the local G/W.
Any help appreciated!