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The Graveyard - Products No Longer Supported => Routers / COVR => DIR-825 => Topic started by: JeffWScott on August 08, 2013, 07:21:52 PM

Title: Port forwarding port 80 works for a limited time only
Post by: JeffWScott on August 08, 2013, 07:21:52 PM

So I recently had the need to forward port 80 to an Apache server at my house.  I forwarded port 80 to the IP address of the server and everything was okay (I could hit the webpage from outside my network).  Then about 10 minutes later it stopped working.  I went back into my router, checked the settings (still good) and then hit save.  Everything started working again..  except 20 or so minutes later it stopped working.

I actually have another Apache server so I booted it up and tried forwarding the ports to it and I get the same behavior.

If I'm within my home network and I type www.mydomain.com/website/ I can hit it fine.  But if I use something that is not on my network, like my phone on LTE, and try it it will fail with "webpage cannot be found".  But the same link, from within my network, works fine.  So then I go into the router, simply re-save the configuration, and then it works again for like 10-30 minutes.

What could be causing this?!?  It's such a weird problem to have!

In the logs when everything stops working I get this message a bunch of times "Blocked incoming TCP SynAck packet"  there is some IP information associated with that error.

Title: Re: Port forwarding port 80 works for a limited time only
Post by: FurryNutz on August 09, 2013, 07:14:22 AM

Link>

Welcome! (http://forums.dlink.com/index.php?topic=41537.0)

• What Hardware version is your router? Look at sticker under router.
• Link>What Firmware (http://forums.dlink.com/index.php?topic=47512.0) version is currently loaded? Found on the routers web page under status.
• What region are you located?
• Are you wired or wireless connected to the router?
• Has a Factory Reset been performed?
• Was a Factory Reset performed before and after any firmware updates?
• Was the router working before any firmware updates?

Internet Service Provider and Modem Configurations

• What ISP Service do you have? Cable or DSL?
• What ISP Modem Mfr. and model # do you have?
• What ISP Modem service link speeds UP and Down do you have?
• Check ISP MTU requirements, Cable is usually 1500, DSL is around 1492 down to 1472. Call the ISP and ask. Link>Checking MTU Values (http://forums.dlink.com/index.php?topic=53008.0)
• For DSL/PPPoE connections on the router, ensure that "Always ON" option is enabled.

Router and Wired Configurations
Some things to try: - Log into the routers web page at 192.168.0.1. Use IE, Opera or FF to manage the router.

• Turn off ALL QoS (http://vonage.nmhoy.net/qos.html) or Disable Traffic Shaping (DIR only) GameFuel (DGL only and if ON.) options, Advanced/QoS (http://en.wikipedia.org/wiki/Quality_of_service) or Gamefuel.
• Turn off Advanced DNS Services if you have this option under Setup/Internet/Manual or under Setup/PARENTAL CONTROL/Set to>None: Static IP or Obtain Automatically From ISP.
• Enable Use Unicasting (compatibility for some ISP DHCP Servers) under Setup/Internet/Manual.
• Turn on or off DNS Relay under Setup/Networking. Link>Finding Faster DNS Addresses using Name Bench (http://forums.dlink.com/index.php?topic=53222.0)
• Setup DHCP reserved IP addresses for all devices ON the router. Setup/Networking. This ensures each devices gets its own IP address when turned on and connected, eliminates IP address conflicts and helps in troubleshooting.
• Ensure devices are set to auto obtain an IP address.
• If IPv6 is an option on the router, select Local Connection Only or Disable IPv6 options under Setup/IPv6.
• Set Firewall settings to Endpoint Independent for TCP and UDP under Advanced/Firewall. Enable or Disable SPI (http://en.wikipedia.org/wiki/SPI) to test.
• Enable uPnP and Multi-cast Streaming under Advanced/Networking. Disable uPnP for testing Port Forwarding rules. Enable IPv6 Multi-cast Streaming for routers that have a Media Server option. Disable IPv6 Multi-cast Streaming if IPv6 or Media Server is not being used.
• Turn off WISH, and WPS under Advanced.
• WAN Port Speed set to Auto or specific speed? Some newer ISP modems support 1000Mb so manually setting to Gb speeds can be supported by the router. Advanced/Advanced Networking/WAN Port Speed
• Set current Time Zone, Date and Time. Use an NTP Server (http://forums.dlink.com/index.php?topic=48695.0) feature. Tools/Time.

• Check cable between Modem and Router, swap out to be sure. Link> Cat6 is recommended. (http://en.wikipedia.org/wiki/CAT6)

3rd Party Security Software Configurations

• Turn off all anti virus and firewall programs on PC while testing. 3rd party firewalls are not generally needed when using routers as they are effective on blocking malicious inbound traffic.
• Turn off all devices accept for one wired PC while testing.

Title: Re: Port forwarding port 80 works for a limited time only
Post by: FurryNutz on September 12, 2013, 07:45:11 AM

Any status on this?  ???