Am Dienstag 12 Juni 2007 17:36 schrieb Hans-Werner Hilse: > Hi, > > On Tue, 12 Jun 2007 17:17:04 +0200 Florian Philipp > > <[EMAIL PROTECTED]> wrote: > > tcp 0 0 *:ftp *:* LISTEN > > That's it. Now better make sure that you were right when you stated > your provider doesn't block it. BTW, if I as a provider had a no file > sharing policy, I'd definitely block Port 21. Maybe I would leave Port > 20 open (ftp-data), but on Port 21 only the ftp server is supposed to > listen, not really the client. > > The other clients are supposed to use whatever port you specify, BTW. > I'm using 50000-50400 myself, and others work fine, too. > > If you want to know whether incoming connections reach your site at all > (not taking server software and firewall into account), run > "tcpdump -vvns 1600 dst port 21" (I guess it wouldn't reveal anything > at all). > > You're not by chance behind a router? > > -hwh
[EMAIL PROTECTED] ~ $ sudo tcpdump -vvns 1600 dst port 21 Password: tcpdump: listening on eth1, link-type EN10MB (Ethernet), capture size 1600 bytes 18:37:12.543965 IP (tos 0x8, ttl 64, id 27970, offset 0, flags [DF], proto: TCP (6), length: 60) 192.168.1.2.45269 > 89.57.3.60.21: S, cksum 0x8013 (correct), 1866573467:1866573467(0) win 5840 <mss 1460,sackOK,timestamp 6212569 0,nop,wscale 5> 18:37:12.544426 IP (tos 0x8, ttl 64, id 17977, offset 0, flags [DF], proto: TCP (6), length: 60) 192.168.1.2.45288 > 89.57.3.60.21: S, cksum 0x98ab (correct), 1867615712:1867615712(0) win 5840 <mss 1460,sackOK,timestamp 6212569 0,nop,wscale 5> 19:07:52.537852 IP (tos 0x8, ttl 64, id 17709, offset 0, flags [DF], proto: TCP (6), length: 60) 192.168.1.2.36423 > 89.57.3.60.21: S, cksum 0x3a4e (correct), 3820262832:3820262832(0) win 5840 <mss 1460,sackOK,timestamp 6672541 0,nop,wscale 5> [...] 27 packets captured 54 packets received by filter 0 packets dropped by kernel In the past Tiscali (my ISP) did not stop file sharing, they just slowed it down to 10-12k. Yes, I am behind a router, NAT is activated, UPnP deactivated. That was no problem up to now...
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