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Port monitoring.

By snide3 ·
On my network I run a proxy server on the PDC and Exchange on the BDC. Lately I have problems with ports shutting down on me.

My Internet stops passing traffic on port 80 with the proxy server still running, I have to reboot my PDC to re-establish an Internet connection. Now, while all this going, on my Exchange server continues to pass email from outside my domain, I test this every time the Internet goes down.

Is there something (software) I can use to monitor these ports, like performance monitor or something else. I want this program to be able to keep a history of all it monitors during the nights, because it seems to happen when I am away.

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Port monitoring.

by curlergirl In reply to Port monitoring.

To directly answer your question, there are several network monitoring options you can use - NT's Network Monitor is OK, and I've used a program called Ethereal (www.ethereal.com) also - either will monitor the packets coming and going on your server. However, both of these and other monitoring software I've heard of, use a lot of resources on the server, so I'm not sure they will tell you what you want to know. I don't know that either one will be able to pinpoint an event that causes your Internet connection to go down. That said, I would first check with the company that is providing your Internet connection (i.e., the service provider for your DSL, cable, T1 or whatever). The fact that your email server continues to function indicates that the Internet connection is not actually "down" but only so slow as to be unworkable. There may be some latency (this is the tech lingo they use for slowness) developing that is causing this to happen. Sometimes they can pinpoint a cause andfix it from their end. Hope this helps!

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Port monitoring.

by snide3 In reply to Port monitoring.

The question was auto-closed by TechRepublic

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Port monitoring.

by Curious_George In reply to Port monitoring.

Hard to answer, you need to identify the problem more specifically, how do you know that port 80 is not passing traffic? Just because clients can't connect to websites doesn't necessarily mean port 80 has failed. Is it inbound or outbound traffic? Does the BDC pass ALL internet traffic through the proxy server, you implied this but did not state it. It is possible that it has it's own connection to the inet.

You can check the port mapper service on the PDC when the problem occurs to see if it is running. Try restarting it too. is the PDC also a web server? The port mapper could be having trouble managing the traffic if this is the case. You should move the webservice to another system.

Slightly off the subject question, but placing aPDC and or BDC, with accounts on it, directly on the internet, is a bad practice. You might consider using a better firewall system. Even a cheap Linksys router, or an install of smoothwall linux firewall on a cheap PC would be a MUCH better practice, relative to security on your private network.

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Port monitoring.

by snide3 In reply to Port monitoring.

The question was auto-closed by TechRepublic

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Port monitoring.

by snide3 In reply to Port monitoring.

This question was auto closed due to inactivity

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