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Author Topic: Firewall rule seems not working  (Read 7728 times)

beppe1973

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Firewall rule seems not working
« on: September 23, 2013, 07:31:44 AM »

I have a new DSR-500N; I would like to port forward my web server so that I can access it from outside my LAN. However, the port forwarding doesn't seem to be working.

The server has a static ip address on localnet and I set up the router to port forward all port 80 connections to that address. It didn't work, the server is accessible from inside the LAN but isn't accessible from outside; furthermore is accesible from inside the lan using IP public static address.
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FurryNutz

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Re: Firewall rule seems not working
« Reply #1 on: September 23, 2013, 08:06:52 AM »

        Link>
Welcome!
  • What Hardware version is your router? Look at sticker under router.
  • Link>What Firmware version is currently loaded? Found on the routers web page under status.
  • What region are you located?

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?
  • If this modem has a built in router, it's best to bridge the modem. Having 2 routers on the same line can cause connection problems: Link>Double NAT and How NAT Works. To tell if the modem is bridged or not, look at the routers web page, Status/Device Info/Wan Section, if there is a 192.168.0.# address in the WAN IP address field, then the modem is not bridged. If the modem can't be bridged then see if the modem has a DMZ option and input the IP address the router gets from the modem and put that into the modems DMZ.
  • Check ISP MTU requirements, Cable is usually 1500, DSL is around 1492 down to 1472. Call the ISP and ask. Link>Checking MTU Values
  • 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.
  • 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.

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beppe1973

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Re: Firewall rule seems not working
« Reply #2 on: September 23, 2013, 08:48:16 AM »

Set MTU to 1492 solved the problem.
Thankyou very much
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FurryNutz

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Re: Firewall rule seems not working (RESOLVED)
« Reply #3 on: September 23, 2013, 09:16:49 AM »

Good to hear. Enjoy.  ;)
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Cable: 1Gb/50Mb>NetGear CM1200>DIR-882>HP 24pt Gb Switch. COVR-1202/2202/3902,DIR-2660/80,3xDGL-4500s,DIR-LX1870,857,835,827,815,890L,880L,868L,836L,810L,685,657,3x655s,645,628,601,DNR-202L,DNS-345,DCS-933L,936L,960L and 8000LH.