Home Networking / Router / & WiFi Gateway Help

[sql100]

Without going into too many details: I know how to work port forwarding. I have setup port frwarding before with no issues. However I am finding that every couple of weeks the port I have forwarded is gone and I have to set it up in the gateway again. Works fine a couple of weeks then disappers. Any idea why?

[reasd]

Hello,

When this happens can you open a new connections? 

If this happens it sounds like a problem with the router problem. Do you have the latest firmware update and if so try replacing the router. 

[reasd]

Hello,

When this happens can you open a new connections? 

If this happens it sounds like a problem with the router problem. Do you have the latest firmware update and if so try replacing the router. 

[EG]

Is your WAN (public) IP address changing ? Perhaps you need to use a service like DynDNS ?

[kevj]

sql100,

do you mean that the port forwarding configuration is disappearing from your router configuration? If so, there are a few reasons this may be happening:

1. Someone has your router password and is changing settings.

2. Corrupt router config - make a note of all your settings, factory reset the router and set it up from scratch. DO NOT use a backup file to restore it.

3. Corrupt router firmware. Download the latest version from the router manufacturer and reflash. Set your router up again from scratch. DO NOT use a backup file to restore it.

[sql100]

The IP will change once in a very long while. I always check this when the problem occurs. 99.9% of the time it has not chnaged.

[sql100]

Yes, Port Forwarding configuration simply dissappears.

On #1, I am doubtful, but you never know. I will change the password when I get home.

I will check out #2 and #3 when I get home. 

This is a rented, combined router/modem/WFI from Comcast. I am not sure, since it belongs to Comcast, if they in some way automaticlly apply any updates or if I have to do it. I will check out the Comcast site and manual for info on that.

My prevous router (which I owned, and I was with Comcast) only had this issue when the IP changed, which only happened once in a long, long while. I was initially suspecting that Comcast may be occasionaly running something that is removing the port forwarding as some sort of protection program. You know, protect the customer against his/herself. Dunno.

[sql100]

Not sure what you mean by new connections. I set it up again and it works fine for a couple of weeks then loses the port forwarding configuration.

As to you comment on the firmware and possible replacement see my reply further donw to another person with suggestions along the same lines. Ultimately you may be right. May just have a bum router.

[kevj]

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sql100 wrote: 

This is a rented, combined router/modem/WFI from Comcast.

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Ugh...probably yet another bug in thier custom firmware.

If you really want to have control of your network, you could buy you own router, and call 800-363-2416 to have the Comcast device placed in Bridge mode, which makes it act like a modem only. You would them make all of your port forwarding configurations at YOUR router, which only you have control of.