Port 20 is used for the actual data transfer (directory listings, files, etc) after you have authenticated with port 21 (ftp control). Port 20 will not be an open port and will not allow connections until port 21 tells it to (someone could hijack an active connection if port 20 was open to anything including a telnet diagnostic connect).
----- Original Message ----- From: "Benny Pedersen" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Saturday, August 03, 2002 3:02 PM Subject: Port 20 blocked. How to unblock > Originally to: Phillip Morgan > > Hello Phillip. > > 12 Jul 02 16:40, you wrote to all: > > PM> I tried to telnet to port 21 and found that works, but telnet'ing to > PM> port 20 (ftp-data), fails (connection refused). > > fix with using passive ftp, only non passive ftp use port 20 > > and dont use host.* use proftpd.conf, man proftpd.conf find limith > > and make AllowStoreRestart on to enable resume upload, and have AllowStoreRestart off in your anon ftp config > > ask if you still need help > > PM> So why would a connect to port 20 be refused? > > ask your isp :-) > > Benny > > <-> Gateway Information. > This message originated from a Fidonet System (http://www.fidonet.org) > and was gated at TCOB1 (http://www.tcob1.net) > Please do not respond direct to this message but via the list > > > - > To unsubscribe from this list: send the line "unsubscribe linux-newbie" in > the body of a message to [EMAIL PROTECTED] > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.linux-learn.org/faqs > - To unsubscribe from this list: send the line "unsubscribe linux-newbie" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.linux-learn.org/faqs
