Broadband Tech > Networking > THOMSON TG585 V8 Modem/Router PortFwd Not Working!!!

THOMSON TG585 V8 Modem/Router PortFwd Not Working!!!

user.ini.zip 12,101 bytes

You might try TCPView, part of the Sysinternals networking suite of programs.

»technet.microsoft.com/en-us/sysi···bb897437

The whole enchilada...

»technet.microsoft.com/en-us/sysi···bb842062
--
"When all else fails read the instructions..."
MS-MVP Windows Expert - Consumer

Thanks Bro! I'm not a network wiz, so can someone please tell me what to look for?

I know the name of the process sending the communication and through which port and I could see that when I've launched TCPview or Process Monitor on my PC

However, what exactly should I be looking for to see if the incoming connection is being blocked and by what?

Thanks!

-P

Any takers pleaaaaaaaaaaaaaaaaaaaaase? Thanks -P

reply to pmolson
Possibilities I can think of :

a) do a telnet to your public IP from another computer on the internet on port 23232, do you get an OPEN?

b) NMap or similar, and send a stream of data to that port

c) in conjunction, set up wireshark on the PC that's supposed to be listening on port 23232.
Does it get see any data even get to its NIC?

Regards

reply to pmolson
I'm going to move this over to General Networking.. See if you can get more input over there..

-Jason
--
When cryptography is outlawed, bayl bhgynjf jvyy unir cevinpl.

reply to pmolson
Hi,

I cannot telnet to the machine in question coz port 23 is closed, even though I've port-forwarded it on the router!!!

I've installed Nmap, launched it entered internal ip and pressed scan, but don't know what to look for, it says all ports are closed even though I know that one port is WIDE OPEN according to canyouseeme.

I don't know what wireshark will do at this point, since port 23232 is closed.

Is there a way to force a specific port to STAY OPEN i.e run something a s service, then have other apps use that port?

Thanks Again!

-P

He meant tenlet to the 23232 port:

> telnet aa.bb.cc.dd 2323

telnet can use any port. It should be done from outside your connection (a tenet app on a smartphone will work.)
--
Scott Henion

Embedded Systems Consultant,
SHDesigns home - DIY Welder

reply to pmolson
I've tried telnet through 23232 w/o any sucess it says connection coz port 23232 closed!!!

Maybe this will help:

reply to pmolson
Thanks for the video dude! Prior to posting here I did search (rather extensively) for help with this problem and I have seen the video already...

I've done everything and, as I've mentioned, I have correctly port-forwarded ports 23232 and 23, but for some reason they're still closed!!!

It is worth mentioning that occasionally I see them open (when I try "canyouseeme.org"), but then for some reason they close after a few min!!!! I'd like to know what causes them to close. Again both router and windows firewall are disabled and I have no other program with firewall!!!

Please help...

open a cmd prompt on the PC running the app that talks on 23232 and run:

netstat -n -a

Make sure your application is still listening on port 23232.

Could be windows firewall, I have seen it do things even if supposedly disabled. Only way to stop it is to stop the service (right click on My Computer and select manage then services.)
--
Scott Henion

Embedded Systems Consultant,
SHDesigns home - DIY Welder

Thanks for the tip abt Windows Firewall "win fw"...

Note that as a precautionary measure I did add those ports and the listening app as exceptions to win fw, before disabling it.

Now back to disabling it from services, I've noticed that the entry in question is called windows firewall/Internet sharing connection and that's odd!! I wish they had those two separate, coz@times I use ICS! Any thoughts on disabling only win wf as a service, and not ICS? Before I try disabling it...

Thanks!

It's possible that your ISP is using NAT. What is the WAN IP address on your router?

I have not yet done what shdesign had suggested, but I'm able to telnet to port 23232 now and I can see it's wide open...it's been that way for a few hrs now, but I'm sure it'll close again.

When the port closes, I will disable WFW as a service (as suggested by shdesigns above) and I'll let you now if it fixes the problem...Thanks to ALL!

reply to pmolson
Did what shdesigns suggested, But I'm still having problems with opening port 23232...It stays open for a while than all of the sudden it's closed!!! Any help debugging what's causing it to close is greatly appreciated. Also if there a way to force a port to stay open. Thanks!

Ports opening and closing largely is a function of the software, so unless the software itself offers
some sort of debugging, you're SOL. Dumb question, but exactly what program is it that you're
trying to get it to listen on port 23232?

As for wireshark, it'll simply prove whether the PC in question's NIC is even seeing any traffic
while it's behind the TG585. If you get an OPEN (which you did) then the issue likely lies with
the PC itself.

Regards

reply to pmolson
I'm still stuck! Any help pleaaaaaaaaaaaaaaaaaaaaaaaaase!

reply to pmolson
Like I said, the wireshark idea. OPEN is not the endall to all, the software also has to know what
to do with the actual packet. My thought is start everything fresh -- the router, the PC, the software
-- open the connection and start sending actual WMS data to it while wireshark is running. I'd also
try the netstat -a idea as well. Trick afterwards will be to catch when it can't send data anymore to
port 23232 and seeing what both wireshark and netstat -a see when that happens.

Regards