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| WinMX: Cox Cable, LinkSys, XP SP2 I was experiencing issues uploading/downloading any file with WinMX, regardless of port assignment (or "Firewall, can't do anything about it") settings, port forwarding on the Linksys, etc.
I've visited forums high and low to determine the issue. Most forums seemed to point the finger at ISP P2P port filtering. Not to say that isn't the case in your particular setup, but eventually I discovered something that worked.
It appears that SP2's version of TCPIP.SYS (Event_ID 4226) limits possible connections to 10, making it very difficult for WinMX users to connect. This was especially true in my case since I'm running both a W3/FTP server through IIS 5.1
Downloading a patch that installs a rogue version of TCPIP.SYS that is runtime configurable (you can set max connections) fixed the issue. The particular patch I used is called "EvID4226Patch" and should be easy enough to find through Google. I followed the simple instructions to set my connections to 50 (uses a text CMD interface) and instantly WinMX began to work for uploads and downloads.
This requires a bit of faith on my part, I'm wary of trusting lesser known third-party system file versions. I'll be vigilantly watching over the next several days to detect any changes in system stability, and report back if any issues are found.
Here is a summary of my configuration:
-TCPIP.SYS patch: 50 connections possible (vital)
-WinMX: Secondary Connection
-WinMX: Incoming TCP listening on 6699
-WinMX: In / Out UDP listening on 6257
-Router: Forwarding 6699-6699 TCP to my private IP 192.168.1.xxx
-Router: Forwarding 6257-6257 UDP to my private IP 192.168.1.xxx
-Router: NO DMZ IS USED.
Hope this helps. Below is a table of filtered ports by COX, as disclosed by them on their support website. (Apologies in advance if formatting gets mungled by post.)
Port Transport Protocol Direction Reason for Filtering
---- --------- -------- --------- --------------------
25 TCP SMTP Both* SMTP Relays
80 TCP HTTP Inbound Web servers, worms
135 UDP NetBios Both Net Send Spam/Pop-ups, Worms
136-139 UDP, TCP NetBios Both Worms, Network Neighborhood
445 TCP MS-DS/ NetBios Both Worms, Network Neighhood
1433 TCP MS-SQL Inbound Worms, Trojans
1434 UDP MS-SQL Inbound Worms, SQLslammer
1900 UDP MS-DS/ NetBios Both Worms, Network Neighborhood
27374 TCP Subseven Both SubSeven Trojan | |
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