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Modem/Router keeps dropping Port Forwarding
kikz 
27/8/08 8:34:21 AM
Immortal

I've got a DLink DSL-502T modem/router connected to a 8 port gigabit switch (which is also connected to a 4 port/802.11g router with DHCP server turned off, and in bridging mode).

I've got 4 PC's connected to the switch, all by ethernet. Two PC's use DHCP and two use static IP's. My server, a windows 2003 server box, has a static IP (192.168.3.50). In my router I have port forwarded a few ports to the win2k3 box. (Web, FTP, PPTP, L2TP, IPSEC). I restart the router to save the settings (as it tells me to do) then once it's restarted I check to ensure the port forwarding actually takes. It does. I also port forward some ports to my other static IP (192.168.3.4) machine (bittorrent, uTorrent, uTorrent Web access).

The problem I have is that the port forwarding for the 192.168.3.50 machine (the server) doesn't stick. I redid the port forwarding last night and restarted the router, then connected to my work machine (via SBS RDP) to connect via VPN to my home network and everything worked. The port forwarding was still set in the router. I also checked the port forwarding on the router before I left for work this morning. It was still set.

This morning at work I tried to connect to the VPN and the web server and it failed. I suspect the port forwarding has been lost again. This seems to happen every day and when I get home and check the port forwarding for that machine, it's no longer there.

Initially the IP address was 192.168.3.250 and I changed it to 192.168.3.50 thinking maybe something bizarre was occurring and that would make a difference. The ethernet cable was also originally plugged in to the 802.11g router. In the original configuration, it operated exactly as it does now. That is, it worked for a while then stopped working (I also got my brother to VPN in from this place, so I know the VPN was working).

Strangely to me, the other machine's port forwarding doesn't get lost.

This used to work with no worries a few weeks ago, when my server was a VM on the other box, but now it's a standalone machine, this is occurring. The only other difference then was that I was using all DHCP leases, with static assignments to the various MAC addresses on my network.

My router doesn't seem to be losing it's settings, as it still has the login details for ADSL2+ and the other port forwarding settings...

Any ideas?


Edited by kikz: 27/8/2008 8:38:29 AM

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Q6600 | 4Gb PC6400 | 2 x 500Gb RAID 0 + 2 x 320 Gb RAID 0 | 19" Benq FP591 + 24" Samsung 245B + 19" Dell | 8800GTS 640 Mb + 8400GS 256 Mb | Gigabyte GA-P35-DS3P | Antec P182 | Corsair HX-620 | Thermalright 120 Extreme | Vista x64

nicephotog-jvm.net 
27/8/08 9:18:37 AM
Master

Thereare ways of conflicting, but for now , why not do a heavy run on two things in your windows server.
1. Antivirus scan
2. Symantec Windoctor scan.
3rd , Did you change your router IP record of the server , it could be slipping back. In serious aging systems the router has extra memory blocks physically that you switch to that will stop the RAM imprint of the old address from re catching by the firewall check getting suspicious of the setting.

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NIN - Reptile (Reciprocating Marine engine)

kikz 
27/8/08 9:44:38 AM
Immortal

Quote by nicephotog-jvm.net
Thereare ways of conflicting, but for now , why not do a heavy run on two things in your windows server.
1. Antivirus scan
2. Symantec Windoctor scan.
3rd , Did you change your router IP record of the server , it could be slipping back. In serious aging systems the router has extra memory blocks physically that you switch to that will stop the RAM imprint of the old address from re catching by the firewall check getting suspicious of the setting.


Thanks for the suggestions.
The server is brand new. I built it last weekend. As part of the build I installed anti-virus software. The IP Address the router thinks the server is matches the actual static IP of the server at all times.

The issue is always resolved (temporarily) by just readding the port forwarding and restarting the router.

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Q6600 | 4Gb PC6400 | 2 x 500Gb RAID 0 + 2 x 320 Gb RAID 0 | 19" Benq FP591 + 24" Samsung 245B + 19" Dell | 8800GTS 640 Mb + 8400GS 256 Mb | Gigabyte GA-P35-DS3P | Antec P182 | Corsair HX-620 | Thermalright 120 Extreme | Vista x64

segger 
27/8/08 6:33:25 PM
Guru

Stop using D-Link hardware. Or try a firmware upgrade.

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Random spam line #7:
Give her womb a good massage with your newly augmented pole

kikz 
27/8/08 6:58:38 PM
Immortal

Quote by segger
Stop using D-Link hardware. Or try a firmware upgrade.


I'm on the latest version. This is my fourth modem/router in as many years. I'm really sick of the shit quality of modem/routers in general (My previous was a Linksys WRT54G which died after about 8 months when all ethernet ports stopped working. Then again, I should just STFU or spend a few hundred dollars more :S

EDIT: I just don't understand how it can be working flawlessly for months then start doind this when I move from Virtualised.


Edited by kikz: 27/8/2008 6:59:32 PM

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Q6600@3.2Ghz | 8Gb PC6400 | 2 x 500Gb RAID 0 + 2 x 320 Gb RAID 0 | 19" Benq FP591 + 24" Samsung 245B + 19" Dell | 8800GTS 640 Mb + 8400GS 256 Mb | Gigabyte GA-P35-DS3P | Antec P182 | Corsair HX-620 | Thermalright 120 Extreme | Vista x64

kikz 
28/8/08 6:38:53 AM
Immortal

I switched back to using static DHCP mapped IP address on the server 192.168.3.3 now and so far it's all working :S

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Q6600@3.2Ghz | 8Gb PC6400 | 2 x 500Gb RAID 0 + 2 x 320 Gb RAID 0 | 19" Benq FP591 + 24" Samsung 245B + 19" Dell | 8800GTS 640 Mb + 8400GS 256 Mb | Gigabyte GA-P35-DS3P | Antec P182 | Corsair HX-620 | Thermalright 120 Extreme | Vista x64

The Tick 
28/8/08 11:06:02 AM
Hero
Titan


Quote by kikz
I've got a DLink DSL-502T modem/router



I have had the misfortune of having to deal with two of these on two separate sites.

I have noticed that on both occassions, settings to DHCP (turning it off), firewall settings, port forwarding etc ... would for no apparent reason simply revert back after 5 mins, an hour or even the next day (when I was obviously NOT on site).

There is either some setting that I am missing that locks down the config if the modem has a spaz is power cycled or this is simply a POS.

Sorry this doesn't help you resolve the issue but at least you know your not insane.

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Quote by plebsmacker
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kikz 
28/8/08 11:29:09 AM
Immortal

Quote by The Tick
Quote by kikz
I've got a DLink DSL-502T modem/router



I have had the misfortune of having to deal with two of these on two separate sites.

I have noticed that on both occassions, settings to DHCP (turning it off), firewall settings, port forwarding etc ... would for no apparent reason simply revert back after 5 mins, an hour or even the next day (when I was obviously NOT on site).

There is either some setting that I am missing that locks down the config if the modem has a spaz is power cycled or this is simply a POS.

Sorry this doesn't help you resolve the issue but at least you know your not insane.


Thanks Tick. I'm tempted to just leave it now it seems to be working again. The last thing I might try is to set the IP on the server to be static again, but at the currnet IP of 192.168.3.3 and see if there's some flaw in dlink logic there.

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Q6600@3.2Ghz | 8Gb PC6400 | 2 x 500Gb RAID 0 + 2 x 320 Gb RAID 0 | 19" Benq FP591 + 24" Samsung 245B + 19" Dell | 8800GTS 640 Mb + 8400GS 256 Mb | Gigabyte GA-P35-DS3P | Antec P182 | Corsair HX-620 | Thermalright 120 Extreme | Vista x64

eckythump 
28/8/08 6:30:09 PM
Champion

Hi kikz,

nfi what's wrong, it sounds like a piece of shit.

One thing I would look into is if there's any weird uPnP stuff going on. That's the only thing I can think of that might fuck with settings.

And yeah, D-Link is bad m'kay. Linksys have a fairly good rep, and I think you just lucked out with your WRT54G. I'm yet to hear a bad thing said about Billion gear, though, so if you get totally jack of it, you could look at getting a 7300G or 7300N combo switch/dsl/wireless/router. They seem pretty well regarded.

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"Grandfather had an accident, he got burnt." "Oh no, how bad?" "Well, they don't fuck around at the crematorium."

segger 
28/8/08 9:29:01 PM
Guru

Quote by The Tick
or this is simply a POS.



^^ This.

Quote by eckythump
it sounds like a piece of shit.



^^ And this.

Quote by segger
Caress my syrup-covered balls



^^ This too.

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Random spam line #7:
Give her womb a good massage with your newly augmented pole

kikz 
29/8/08 5:55:19 AM
Immortal

Quote by segger
Caress my syrup-covered balls



^^ This too.

I like cake.

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Q6600@3.2Ghz | 8Gb PC6400 | 2 x 500Gb RAID 0 + 2 x 320 Gb RAID 0 | 19" Benq FP591 + 24" Samsung 245B + 19" Dell | 8800GTS 640 Mb + 8400GS 256 Mb | Gigabyte GA-P35-DS3P | Antec P182 | Corsair HX-620 | Thermalright 120 Extreme | Vista x64

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