Cisco 851 Router won't forward port 80

I am trying to map all incoming Internet port 80 traffic to an internal web server. I have successfully done this with
several other services like FTP, SMTP and POP3. See my running config below:

ip nat inside source list 1 interface FastEthernet4 overload
ip nat inside source static tcp 192.168.1.101 17307 interface FastEthernet4 17307
ip nat inside source static tcp 192.168.1.101 6881 interface FastEthernet4 6881
ip nat inside source static tcp 192.168.1.132 993 interface FastEthernet4 993
ip nat inside source static tcp 192.168.1.128 6100 interface FastEthernet4 6100
ip nat inside source static tcp 192.168.1.128 25 interface FastEthernet4 25
ip nat inside source static tcp 192.168.1.132 990 interface FastEthernet4 990
ip nat inside source static tcp 192.168.1.132 5000 interface FastEthernet4 5000
ip nat inside source static tcp 192.168.1.132 110 interface FastEthernet4 110
ip nat inside source static tcp 192.168.1.125 21 interface FastEthernet4 21
ip nat inside source static tcp 192.168.1.115 80 interface FastEthernet4 80


The port 80 mapping does not work. All HTTP traffic from the Internet is redirected to the Cisco SDM login page. If I
disable SDM, I get page cannot be displayed. I've searched everywhere for an answer but haven't been able to find
anything.

Any help is appreciated!

--Paul

"Paul" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
>I am trying to map all incoming Internet port 80 traffic to an internal
>web server. I have successfully done this with
> several other services like FTP, SMTP and POP3. See my running config
> below:
>
> ip nat inside source list 1 interface FastEthernet4 overload
> ip nat inside source static tcp 192.168.1.101 17307 interface
> FastEthernet4 17307
> ip nat inside source static tcp 192.168.1.101 6881 interface FastEthernet4
> 6881
> ip nat inside source static tcp 192.168.1.132 993 interface FastEthernet4
> 993
> ip nat inside source static tcp 192.168.1.128 6100 interface FastEthernet4
> 6100
> ip nat inside source static tcp 192.168.1.128 25 interface FastEthernet4
> 25
> ip nat inside source static tcp 192.168.1.132 990 interface FastEthernet4
> 990
> ip nat inside source static tcp 192.168.1.132 5000 interface FastEthernet4
> 5000
> ip nat inside source static tcp 192.168.1.132 110 interface FastEthernet4
> 110
> ip nat inside source static tcp 192.168.1.125 21 interface FastEthernet4
> 21
> ip nat inside source static tcp 192.168.1.115 80 interface FastEthernet4
> 80
>
>
> The port 80 mapping does not work. All HTTP traffic from the Internet is
> redirected to the Cisco SDM login page. If I
> disable SDM, I get page cannot be displayed. I've searched everywhere for
> an answer but haven't been able to find
> anything.
>
>
IMHO
I don't know what an SDM is ...but....
if your internal web server is not running,
or if it's running without an index.htm file in the web-root directory
---> it's normal to have something like "page cannot be displayed" when the
HTTP - port 80 mapping is well done.