jrothwell Absent Member.
Absent Member.
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Port 80 inbound extremely slow or gateway timeout

Not sure if this is the correct forum but here goes...

I have been able to access my web server on port 80 without a problem for several years. Just recently, when I attempt to access the site, it loads extremely slowly or I end up with a gateway timeout. If I attempt to access the site over ssl on port 443 (or any other port), the page loads fine. I am not having issues with any other ports. When accessing the internet from inside the network on port 80 everything works fine. It seems like just port 80 inbound is effected. I have searched for a solution and could not find anything. I host my own DNS (Novell) and my servers are Novell Netware 6.5 with apache2. I have checked several settings including DNS and nothing has changes or looks strange.

Any help would be appreciated.

Thanks,
Jason Rothwell
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6 Replies
Knowledge Partner
Knowledge Partner

Re: Port 80 inbound extremely slow or gateway timeout

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A Gateway Timeout makes me think you have Novell Access Manager (NAM) or
some kind of proxying setup involved; do you? Does your DNS from outside
resolve directly to the server or does it go to your reverse proxy like
NAM? What do you see in your web server's access_log (assuming Apache)
when you try to get in? If nothing, find out where your packets are going
and start there. This sounds like something in between is causing your pain.

Good luck.





On 08/16/2010 02:36 PM, jrothwell wrote:
>
> Not sure if this is the correct forum but here goes...
>
> I have been able to access my web server on port 80 without a problem
> for several years. Just recently, when I attempt to access the site, it
> loads extremely slowly or I end up with a gateway timeout. If I attempt
> to access the site over ssl on port 443 (or any other port), the page
> loads fine. I am not having issues with any other ports. When accessing
> the internet from inside the network on port 80 everything works fine.
> It seems like just port 80 inbound is effected. I have searched for a
> solution and could not find anything. I host my own DNS (Novell) and my
> servers are Novell Netware 6.5 with apache2. I have checked several
> settings including DNS and nothing has changes or looks strange.
>
> Any help would be appreciated.
>
> Thanks,
> Jason Rothwell
>
>

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jrothwell Absent Member.
Absent Member.

Re: Port 80 inbound extremely slow or gateway timeout

Thanks for your reply Ab,

I do have a reverse proxy in place (Sun java system web proxy server). I have verified the settings and restarted the server and I am still having the same problem. Every once in a while, the page will load fine but most of the time I reveive the gateway timeout. I also have a BorderManager server in place for forward proxy. When I access the site from inside the network via ip address there is no issue, everything loads fine. DNS resolves to my public address, hits the firewall, and port 80 is forwarded to the private ip of the reverse proxy.
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Knowledge Partner
Knowledge Partner

Re: Port 80 inbound extremely slow or gateway timeout

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And the other requested tests?

Good luck.





On 08/16/2010 04:36 PM, jrothwell wrote:
>
> Thanks for your reply Ab,
>
> I do have a reverse proxy in place (Sun java system web proxy server).
> I have verified the settings and restarted the server and I am still
> having the same problem. Every once in a while, the page will load fine
> but most of the time I reveive the gateway timeout. I also have a
> BorderManager server in place for forward proxy. When I access the site
> from inside the network via ip address there is no issue, everything
> loads fine. DNS resolves to my public address, hits the firewall, and
> port 80 is forwarded to the private ip of the reverse proxy.
>
>

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Bob-O-Rama
Visitor.

Re: Port 80 inbound extremely slow or gateway timeout

jrothwell;2011283 wrote:
Thanks for your reply Ab,

I do have a reverse proxy in place (Sun java system web proxy server). I have verified the settings and restarted the server and I am still having the same problem. Every once in a while, the page will load fine but most of the time I reveive the gateway timeout. I also have a BorderManager server in place for forward proxy. When I access the site from inside the network via ip address there is no issue, everything loads fine. DNS resolves to my public address, hits the firewall, and port 80 is forwarded to the private ip of the reverse proxy.


First principles...

If the server is dual homed, multiple IP's, multiple NIC's, etc... you may have a routing issue where the server uses a different interface to return the traffic. This will cause random issues, slowness, but often will work even when its terribly broken. Ensure the traffic goes in / out the proper interfaces on the server and that the route through your network is proper.

Also look for mundane issues, like incorrect speed / duplex / ... and errors on your switched ports.

-- Bob
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jrothwell Absent Member.
Absent Member.

Re: Port 80 inbound extremely slow or gateway timeout

Thanks to all who replied,

My reverse proxy also had forward proxy enabled (by default). I checked the logs and noticed that there were large amounts of traffic being generated on port 80 by ad websites. It looks like a bot found the site and because forward proxy was enabled, it was being used to proxy adware, etc which made port 80 extremely slow.

Jason Rothwell
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Knowledge Partner
Knowledge Partner

Re: Port 80 inbound extremely slow or gateway timeout

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Good catch. Thanks for posting back your results.

Good luck.





On 08/17/2010 01:24 PM, jrothwell wrote:
>
> Thanks to all who replied,
>
> My reverse proxy also had forward proxy enabled (by default). I checked
> the logs and noticed that there were large amounts of traffic being
> generated on port 80 by ad websites. It looks like a bot found the site
> and because forward proxy was enabled, it was being used to proxy
> adware, etc which made port 80 extremely slow.
>
> Jason Rothwell
>
>

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