How to configure a cisco 2940 switch to work with cisco 1841 router?

[danielnitoi]

Hello everybody. I am new on this forum, i browsed theese pages for a couple of days but i cannot find a solution to my problem.

I'm a beginner in this domain and i will try to explain what i want to do as clearly as possible:

I have a Cisco 2940 switch and a Cisco 1841 router. I want to build two different VLAN networks on the switch, which do not have to communicate one with each other, but those VLANS should communicate with the router.

I read a lot of articles, i tried to configure properly the switch and the router but i still don't get them work.

I set on the switch, the GigabitEthernet 0/1 port to Trunk port and i had to set it a native VLAN. The problem is that only from that native VLAN, i can ping the router.

I'm not sure i understood how theese devices work... Please help.

Thanks

[danielnitoi]

My webserver runs on port 85. I made that NAT entry on my fast0/1.1 subinterface and now it works just fine. However i still have one little problem. When i try to ping from LAN the outside WAN (an ip address), it doesn't work. Works only the ping to the outside interface (fast0/0). What i am missing? How to use access-lists?Do i need them?

[Mukti chandwani]

1.do you mean ping  89.x.x.x  (interface ip) works and

ping  89.x.x.x(interface ip)source f0/0.1 does not? or are you tring to ping ISP next hop.

please make sure you have f0/0.1 up/up when you are trying to ping local WAN ip.

2. is internet working ?

please paste output of

sh run | in ip nat

[Mukti chandwani]

Sorry .Mistyped.I meant  please make sure you have f0/1.1 up/up when you are trying to ping local WAN ip