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HTTP Timing Out

By Luke Ingerman ·
I am running an NT 4.0 network. This network has functioned properly for the last year. Starting yesterday, we were unable to browse any web sites. I am able to successfully ping and tracert to the distant web server using both the IP address and name (i.e. www.server.com). Whenever I try to access a web site (via url or ip address) the connection times out.

The network itself is a TCP/IP routed network using Cisco routers in each building. There are about eight building that feed into a single building with the inbound/outbound feed. So far my building is the only one experiencing this problem. This is a time critical issue as my office submits weekly reports to headquarters via web based mail.

Any suggestions will be greatly appriciated.

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HTTP Timing Out

by Luke Ingerman In reply to HTTP Timing Out

Point value changed by question poster.

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HTTP Timing Out

by jay In reply to HTTP Timing Out

Maybe there's a problem with layer 3
switching on your cisco.
You can ping the server but your cisco routes
every port 80 connection to another links so
the answer of every request from browser
never come.
Try with another port like
ftp/telnet/ssh/snmp to the server, if the
connection has no problem, there's some
problem with your L3 switching or your
browser connect to proxy (the proxy can
connect to the server)

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HTTP Timing Out

by Luke Ingerman In reply to HTTP Timing Out

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HTTP Timing Out

by 4U21DER In reply to HTTP Timing Out

Tough Question:
There are alot of things that "could" be wrong. So i will just give you a few things that i try when network services die.

1.) Try telneting to a host OUTSIDE of your LAN/WAN. This will test all your TCP/IP Layers.

2.) Good old tracert! See where packets are dyin.

3.) Check the settings and traffic on the routers interfaces.

4.) Check to see if you are able to do nslookups (DNS Resolution) {tests for UDP!}

You never stated what kinda of connection you have to the internet. Are you in a DMZ? Are you using a Proxy? Firewall? What routing and routed protocols are you running in your internetwork? Are you using a frame-relay connection to the internet?

Your circut provider may also be lying to you! Believe it or not they do. My experience has been that if its not an equipment failure and no one has touched the routers, it your circut provider!!

This just happened to me last week.

Not exactly an answer, but maybe it will help give you another direction to go towards.

Good Luck!

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HTTP Timing Out

by Luke Ingerman In reply to HTTP Timing Out

We have already tried ping, tracert, telnet, and ftp. These all work, but I still can't get a web page to display. My router is configured correctly and I spent most of today trying to get someone to review the distant end router. We are not using aproxy or firewall as we are on a protected network. Thank you for the response.

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HTTP Timing Out

by peter_ohman In reply to HTTP Timing Out

1. Telnet to www.w3c.org on port 80.
2. If you get connected continue to 3. If not, your packets go somewhere else than to w3c. If this is the case, try to use tcpdump to see from where you get the response (if any). Check firewalls, routers and such.
3. Type "GET / HTTP/1.0" and press enter twice.
4. You should recieve the w3c home page in your telnet window.
5. If you've come this far, check any proxy settings in the web browsers. Make sure they are correct.

--Peter

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by Luke Ingerman In reply to HTTP Timing Out

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by Luke Ingerman In reply to HTTP Timing Out

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