Sorry but another router question

Mark_6 · #1 24-07-2002, 23:15

After opening tcp 8765 and UDP 8766 on our Cisco router I get a UDP error. The server and clients sees me for a second then I get the UDP error and I am dropped. I ‘m assuming 8765 is open because they see me but 8766 is not open or it’s the wrong port. Is there a range I should open or am I missing something. When I open the router up (no restrictions) TS works fine.

ScratchMonkey · #2 24-07-2002, 23:29

Can you have the router log the packets? (Just the headers is all that's needed.) Then you can see what ports are really being used.

Mark_6 · #3 24-07-2002, 23:38

I'll give it a try.

Mark_6 · #4 25-07-2002, 21:47

Unfortunately we do not have the expertise to do that.

Any other suggestions???

T. Boonstra · #5 25-07-2002, 21:50

Are you running a Client(s) or Server behind the router?

Mark_6 · #6 25-07-2002, 21:51

client

3uThäñÄsîä · #7 09-08-2002, 11:12

Quote:

Originally posted by T. Boonstra
Are you running a Client(s) or Server behind the router?

Euhm.. i'm running 3 servers on the same pc behind a router!

I got it settled with
8765 UDP / TCP for 1 server
8766 UDP / TCP for the second
8767 UDP / TCP for the third one

And euhm. What do I have to say! I got no probs... I just enabled "Block WAN ping" OFF else you got probs. (I'm also talking of a Linksys router! Dunno if these are the same. Not informed to it yet!)

Greetzz
EuT

Sensei Humor · #8 14-08-2002, 21:22

On my LinkSys I had to forward the port 8765 to the system that is running the TS client. I was not blocking WAN requests (i.e. ICMP, aka ping) but could not connect, kept getting error -1000 No UDP packet received from server. Once I forwarded the port the problem was resolved.

BryL · #9 15-08-2002, 17:18

Mark6 do you have any firewalls running? What's you OS? What model router are you using? Is it PPP or Bridging mode?

I have a 675 router in PPP mode and Windows XP home version. I had to disable the XP firewall and enter the following commands to my router:
set nat entry add 10.0.0.2 8765 xxx.xx.xx.xxx 8765 tcp
set nat entry add 10.0.0.2 8765 xxx.xx.xx.xxx 8765 udp

set nat entry add 10.0.0.2 8766 xxx.xx.xx.xxx 8766 tcp
set nat entry add 10.0.0.2 8766 xxx.xx.xx.xxx 8766 udp

The duel entrys seem redundant, but it was the only way my setup would work.

Also make sure you're updated to the latest router CBOS. Mine is 2.4.6

Without any firewalls active, I still show all ports filtered according to dslreports.

Bryan