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WNR3500Lv2 port forward problem

ToddAndMargo
Aspirant

WNR3500Lv2 port forward problem

Hi All,

 

I have a Netgear WNR3500Lv2 router, firmware V1.2.0.54_50.0.94 (latest).

 

I can not get the port forward to work correctly.

 

I have a service set up on one my computers on my LAN.  Every other computer on my LAN can access it, so the service is set up correctly.

 

I have the target workstation's MAC address set up in DHCP to always give me the same address.

 

I have configured ADVANCED > Advanced Setup > Port Forwarding / Custom Service to forward to the target workstation's address and the target port number (all four the same).  I have checked for typos so many times my head is spinning.

 

NMAP finds the following on the WAN side of the router:

      53/tcp open domain
      113/tcp closed ident

And I can TCP (not ICMP, I can do that too) traceroute the WAN address on both port 53 and 113.  This shows that the router can see SYN packets.

 

But I can not connect to the port forwared port with either the service I am trying to run, nmap, or traceroute (TCP ping).

 

When I TCP traceroute the port, it dies right before the router.

 

Advanced tech support was suppose to call me back, but did not.

 

Any words of wisdom?  Does this router have to go?

 

Many thanks

-T

Model: WNR3500Lv2|N300 Wireless Gigabit Router|EOL
Message 1 of 4
antinode
Guru

Re: WNR3500Lv2 port forward problem

> I have a Netgear WNR3500Lv2 router, firmware V1.2.0.54_50.0.94 (latest).

 

   Connected to what?

 

> I have a service set up [...]

 

   _Which_ "a service"?

 

> Any words of wisdom? Does this router have to go?

 

   That might not help.  Your ISP can cause problems even if you do
everything correctly.

 

      https://community.netgear.com/t5/x/x/m-p/1859106

Message 2 of 4
antinode
Guru

Re: WNR3500Lv2 port forward problem

> No. It is something entirey different and it is not even in my ISP's
> domain.

 

   That could explain the problem.  If I could see the router's
WAN/Internet IP address, then I might be able to do more than speculate.
You might plug that address into the form at: https://whois.arin.net/
(If that report says anything like "SHARED", then there's no good reason
to hide the address.  Just as with most of the other potentially useful
information which you've concealed.)

 

> This service does not work that way. You have to come at it from WAN
> IP.

 

   That sounds to me like nonsense.  But feel free to reveal why you
believe that this service differs from all others.

 

> [...] I wonder if I have tripped across that "carrier-grade NAT"
> you spoke of. [...]

 

   I'm willing to assume so, given that your parsimonious attitude
toward useful information makes actual analysis nearly impossible.

Message 3 of 4
ToddAndMargo
Aspirant

Re: WNR3500Lv2 port forward problem

Ah ha!  You called it:

 

>  That could explain the problem.  If I could see the router's

> WAN/Internet IP address, then I might be able to do more than speculate.

> You might plug that address into the form at: https://whois.arin.net/
> (If that report says anything like "SHARED", then there's no good reason
> to hide the address.  Just as with most of the other potentially useful
> information which you've concealed.)

 

From whois.arin.net:

SHARED-ADDRESS-SPACE-RFCTBD-IANA-RESERVED

 

I will talk this over with the ISP's sysadmin on Monday.  We have worked together

on a lot of projects together.

 

> parsimonious

Interesting word.  Made me look it up.  I actaully gave you exactlyu the inforemation you need and nothing else to make you go of on a tangent.

 

Thank you for the help!

 

 

Message 4 of 4
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