i4u1 Posted March 27, 2009 Report Share Posted March 27, 2009 I got fragmented outgoing UDP packets blocked by my firewall.Characteristix: their size 60 bytes only(!). Their port numbers in/out are zero (0). The direction is: from local address under NAT (manual port forwarding on router) to WAN address (inet).What's happening? Why uTorrent sends these 60-byte fragmented(!) UDPs to peers? Is it possible to unfagment them in code? Link to comment Share on other sites More sharing options...
Firon Posted March 28, 2009 Report Share Posted March 28, 2009 It's probably your own firewall just being dumb about UDP. Make it blanket-allow UDP. Link to comment Share on other sites More sharing options...
i4u1 Posted March 28, 2009 Author Report Share Posted March 28, 2009 I'm sure FW is quite decent. No cause to not believe.Why not uTorrent? zero ports in/out? and 60 byte fragmented data? Maybe some bad code in there?Btw i have tweaked MTU. Does uTorrent check MTU size in registry to send correctly?I think it's uTorrent bug not FW. Link to comment Share on other sites More sharing options...
DreadWingKnight Posted March 28, 2009 Report Share Posted March 28, 2009 What firewall do you use? Link to comment Share on other sites More sharing options...
i4u1 Posted March 28, 2009 Author Report Share Posted March 28, 2009 Outpost Firewall Pro версия 6.5.3 (2518.381.0686).Check extra send/sendto outgoing udp calls to uninit port of peers. maybe wrong setsockopt params. maybe lack of IP_DONTFRAGMENT. Link to comment Share on other sites More sharing options...
Saribro Posted March 29, 2009 Report Share Posted March 29, 2009 Have you checked the traffic with wireshark or similar to make sure your firewall isn't confusing itself?Might provide more data on the issue aswell if it's not a misreport. Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.