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zaimor
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Joined: 07 Nov 2004
Posts: 4
Location: Fort Drum New York
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 Posted: Sun Nov 07, 2004 4:49 am Post subject: Network Administration Issue / Question |
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From any fellow network admistrators out there, heres an issue I need some help with. I run Abyss on this computer (ip 192.168.1.100), through a LinkSYS router, through a cable connection. I run a network in the building and about 10 people do the same thing (although I'm the only one running a web server)
The problem is every once in awhile, apparently at random, the web server will cease to function on port 80. If I change the port (both on the web server and on the port forwarding in the router) it works... its just that port 80 refuses to work once in awhile. I'm quite sure it's from some other computer on the network trying to use port 80 (like AOL's built in web server... some people use the AOL service, even though they dont have to) I've tried to forward port 80 in my router to a random port on my computer for the webserver, but for some reason that function just doesn't work... IE if i set my web server to port 6200, and open 6200 in my router, it works, but if i forward 80 -> 6200 in my router and try to access it via port 80, it doesnt.
My question is this: What's an easy way to set it up (at the router level, so i dont have to install firewalls on each computer or run them all through mine) to deny all traffic access to port 80 incoming unless it's to my computer. This way I wouldnt have to worry about anything else using port 80, the only working web server would have to be from this IP.
Or, whats a very small, free, easy program to use to install on everyone's computer that would -just block local port 80- so they wouldnt mess with it.
Thanks in advance, -Chris
MSN - cm_zk@hotmail.com
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Yahoo IM - zaimor_andre
website: http://xanga.com/zaimor (if its up, http://be.mine.nu) |
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Anonymoose
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Joined: 09 Sep 2003
Posts: 2192
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| Posted: Sun Nov 07, 2004 3:05 pm Post subject: Re: Network Administration Issue / Question |
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| zaimor wrote: | | I'm quite sure it's from some other computer on the network trying to use port 80 (like AOL's built in web server... some people use the AOL service, even though they dont have to) |
I can guarantee 100% that is not the problem. Each machine on your network has its own IP. Each machine has its own set of ports. Using port 80 on one machine will not stop another machine running a service on its own port 80. The whole internet would fall to pieces if this were the case ;) Your router will not even be aware of the other machines if you have set up a port forwarding rule to forward incoming traffic on port 80 to your machine on port 80. As far as it is concerned, in this respect, nothing of the other machines exist. It receives traffic on port 80 and sends it to your machine, it doesn't consider if any other machines also have port 80 open.
| zaimor wrote: |
I've tried to forward port 80 in my router to a random port on my computer for the webserver, but for some reason that function just doesn't work... IE if i set my web server to port 6200, and open 6200 in my router, it works, but if i forward 80 -> 6200 in my router and try to access it via port 80, it doesnt.
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I had this problem when I very first started using Abyss, it turned out to be the way host headers were handled. The HTTP spec doesn't state how to handle an incoming request with mismatched ports like this. Aprelium were kind enough to send me a version of the server modified to allow mismatched port forwarding to work, but I was under the impression this had been integrated into the main server now. I could be wrong - that would be one only Aprelium can answer. You will likely get a faster response from the support email address than waiting for them to notice this query.
| zaimor wrote: |
My question is this: What's an easy way to set it up (at the router level, so i dont have to install firewalls on each computer or run them all through mine) to deny all traffic access to port 80 incoming unless it's to my computer. This way I wouldnt have to worry about anything else using port 80, the only working web server would have to be from this IP.
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You already have - as I explained above, if you have set up a forwarding rule for port 80, no other machines on your internal network will be able to receive traffic on port 80 on their machine. There is no way that these machines could be blocking your own running of the server - assuming you are running NAT on your router/LAN ? |
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zaimor
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Joined: 07 Nov 2004
Posts: 4
Location: Fort Drum New York
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| Posted: Mon Nov 08, 2004 2:30 am Post subject: |
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| Thanks very much for the input, it helps alot... I'll email Aprelium's support email about the issue and ask them about that. In answer to your question about the NAT, yes... My router is set up as 192.168.1.1, a subnet mask of 255.255.255.128, and (ive forgotten the term) the service that lets the router assign IP addresses is turned off... they're assigned by me 192.168.1.100 - 192.168.1.x. When they email me back I'll post the response here, hopefully it helps.... thanks! |
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