I've noticed lately, that although I have never run any gnutella servant on port 80/tcp, other gnutella servants, especially LimeWire ones, has started to knock on 80/tcp port where Apache is listening for my other uses.

gtk-gnutella has always been listening and using the default port 6346/tcp on my machines and noone else has had this IP-address for over two years now.

This didn't happen before, so either gtk-gnutella, LimeWire or gnet-protocol has changed during last month.

I also asked this on LimeWire forum.

Somehow it would seem to be a problem in gtk-gnutella though, as there is also rather old versions of LimeWire doing this, and it didn't happen before couple of months ago when I used to run older version of gtk-gnutella regularly.

When gtk-gnutella is quit, the knocks to 80/tcp becomes soon more seldom and eventually stops. When gtk-gnutella is started again, the knocks start soon again on 80/tcp.

There is several thousands of these kind of lines already in the httpd-logs: (now lately I've turned the logging off from /uri-red/N2R, but they are still there if I enable it.)

[07/Jan/2004:15:40:28 +0200] (148.61.253.127 148.61.253.127) - - -> "GET /uri-res/N2R?urn:sha1:4R4VM2DXDTEMWEW3BIU6TEH42XXXXXXX HTTP/1.1" - <- 404 1045B 0s "LimeWire/3.6.10" "-" 1014

[07/Jan/2004:15:47:39 +0200] (213.54.113.112 213.54.113.112) - - -> "GET /uri-res/N2R?urn:sha1:4R4VM2DXDTEMWEW3BIU6TEH42XXXXXXX HTTP/1.1" - <- 404 1045B 0s "LimeWire/3.6.8 (Pro)" "-" 1016

[07/Jan/2004:15:58:09 +0200] (68.4.59.73 68.4.59.73) - - -> "GET /uri-res/N2R?urn:sha1:4R4VM2DXDTEMWEW3BIU6TEH42XXXXXXX HTTP/1.1" - <- 404 1045B 0s "LimeWire(Acquisition)/100.2" "-" 1018

[07/Jan/2004:15:58:18 +0200] (24.132.241.16 24.132.241.16) - - -> "GET /uri-res/N2R?urn:sha1:4R4VM2DXDTEMWEW3BIU6TEH42XXXXXXX HTTP/1.1" - <- 404 1045B 0s "LimeWire/3.6.14" "-" 1011

07/Jan/2004:16:12:32 +0200] (211.91.191.30 211.91.191.30) - - -> "GET /uri-res/N2R?urn:sha1:4R4VM2DXDTEMWEW3BIU6TEH42XXXXXXX HTTP/1.1" - <- 404 1045B 0s "LimeWire/3.6.15 (Pro)" "-" 1017

[07/Jan/2004:16:19:11 +0200] (148.233.159.24 148.233.159.24) 201.128.98.64 - ->
"GET /uri-res/N2R?urn:sha1:4R4VM2DXDTEMWEW3BIU6TEH42XXXXXXX HTTP/1.1" - <- 404 1045B 0s "LimeWire/3.6.15" "-" 1012

[07/Jan/2004:16:22:18 +0200] (68.4.59.73 68.4.59.73) - - -> "GET /uri-res/N2R?urn:sha1:4R4VM2DXDTEMWEW3BIU6TEH42XXXXXXX HTTP/1.1" - <- 404 1045B 0s "LimeWire(Acquisition)/100.2" "-" 1018