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problems forwarding http to PC

 
 
Steve Richter
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      05-10-2005
using the cisco 831 on a verizon dsl connect to the internet ...

just experimenting, I dont have a static IP address, I am setting up
one of my W2K PCs as a web server.

pca - 10.10.10.2
pcb - 10.10.10.3 ( is the web server )

on my local lan, from 10.10.10.2, I can browse to a web page on
10.10.10.3:
http://10.10.10.3/demosite/page1.aspx

So I config PAT on the cisco:
configuation - PAT
- enable PAT is checked
- in the row for HTTP, port number 80, I enter 10.10.10.3, then
click "apply"

to verify the port forwarding, at the router service port, I run:

Router>show ip nat translations
Pro Inside global Inside local Outside local Outside
global
tcp 155.196.123.167:80 10.10.10.3:80 --- ---
tcp 155.196.123.167:3008 10.10.10.160:3008 --- ---

But it is not working!!

from pc2, I browse to the web site using the public ip address:
http://155.196.123.167/demosite/page1.aspx

I get a windows network login ( why do I get a login prompt? )

I key in the router user name and password

the the browser displays:
"page cannot be found"

any help is appreciated. Why can I browse to my web site on the local
lan, but not get to it thru the public IP?

Can I put the cisco 831 router is some sort of mode where it logs all
the traffic it is receiving and tells me what it is doing with that
traffic.

So far, I cannot get port forwarding to work at all on this router ( or
the router before it ). Is there someting I should talk to verizon
about?

thanks,

-Steve

 
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Steve Richter
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Posts: n/a
 
      05-10-2005
here is some more info. I dont need an access list, right? When the
access list is not set, that means all traffic is passed?

the "debug packet" command looks like something I would like to run to
help troubleshoot my port forwarding problem. But the 831 router says
that command is not found.

How do I get the 831 router to help me troubleshoot this problem. I
cant forward http ( port 80 ) to my local PC.

thanks,

-Steve


Router>show ip nat translations
Pro Inside global Inside local Outside local Outside
global
tcp xxx.xxx.121.160:80 10.10.10.3:80 --- ---
tcp xxx.xxx.121.160:3008 10.10.10.160:3008 --- ---

Router>show ip interface
Dialer1 is up, line protocol is up
Internet address is xxx.xxx.121.160/32
Broadcast address is 255.255.255.255
Address determined by BOOTP
MTU is 1492 bytes
Helper address is not set
Directed broadcast forwarding is disabled
Outgoing access list is not set
Inbound access list is not set
Proxy ARP is enabled
Local Proxy ARP is disabled
Security level is default
Split horizon is enabled
ICMP redirects are always sent
ICMP unreachables are always sent
ICMP mask replies are never sent
IP fast switching is enabled
IP fast switching on the same interface is enabled
IP Flow switching is disabled
IP CEF switching is disabled
IP Feature Fast switching turbo vector
IP multicast fast switching is enabled
IP multicast distributed fast switching is disabled


Steve Richter wrote:
> using the cisco 831 on a verizon dsl connect to the internet ...
>
> just experimenting, I dont have a static IP address, I am setting up
> one of my W2K PCs as a web server.
>
> pca - 10.10.10.2
> pcb - 10.10.10.3 ( is the web server )
>
> on my local lan, from 10.10.10.2, I can browse to a web page on
> 10.10.10.3:
> http://10.10.10.3/demosite/page1.aspx
>
> So I config PAT on the cisco:
> configuation - PAT
> - enable PAT is checked
> - in the row for HTTP, port number 80, I enter 10.10.10.3, then
> click "apply"
>
> to verify the port forwarding, at the router service port, I run:
>
> Router>show ip nat translations
> Pro Inside global Inside local Outside local Outside
> global
> tcp 155.196.123.167:80 10.10.10.3:80 --- ---
> tcp 155.196.123.167:3008 10.10.10.160:3008 --- ---
>
> But it is not working!!
>
> from pc2, I browse to the web site using the public ip address:
> http://155.196.123.167/demosite/page1.aspx
>
> I get a windows network login ( why do I get a login prompt? )
>
> I key in the router user name and password
>
> the the browser displays:
> "page cannot be found"
>
> any help is appreciated. Why can I browse to my web site on the

local
> lan, but not get to it thru the public IP?
>
> Can I put the cisco 831 router is some sort of mode where it logs all
> the traffic it is receiving and tells me what it is doing with that
> traffic.
>
> So far, I cannot get port forwarding to work at all on this router (

or
> the router before it ). Is there someting I should talk to verizon
> about?
>
> thanks,
>
> -Steve


 
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Loren Amelang
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Posts: n/a
 
      05-11-2005
On 10 May 2005 12:59:03 -0700, "Steve Richter"
<(E-Mail Removed)> wrote:
>
>the "debug packet" command looks like something I would like to run to
>help troubleshoot my port forwarding problem. But the 831 router says
>that command is not found.


I don't know the 831 (I'm still stuck with ISDN), but here are some
commands that work on my 804:

// IP cache operations
debug ip cache
// Dynamic Host Configuration Protocol
debug ip dhcp
// IP error debugging
debug ip error
// FTP dialogue
debug ip ftp
// HTTP connections
debug ip http
// ICMP transactions
debug ip icmp
// IGRP information
debug ip igrp
// IP multicast packet debugging
debug ip mpacket
// NAT events (forwarded packets only)
debug ip nat
// General IP debugging and IPSO security transactions
debug ip packet
// (selected packets only)
debug ip packet [access-list#]
// (show source/dest port)
debug ip packet detail
// IP peer address activity
debug ip peer
// RIP protocol transactions
debug ip rip
// Routing table events
debug ip routing
// RTP information
debug ip rtp
// IP security options
debug ip security
// Socket event
debug ip socket
// TCP information
debug ip tcp
debug ip tcp driver-pak
debug ip tcp packet
debug ip tcp sack
debug ip tcp transactions
// IP temporary ACL
debug ip tempacl
// UDP based transactions
debug ip udp

As the note says, "debug ip nat" only shows you the packets that get
NATted, not the ones you hoped were going to but didn't.

Commands like "debug ip packet detail" can produce a _lot_ of output.
Be careful not to trigger too much activity while they are on...

Loren
 
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