Hi. Thanks for answering back so soon Ben. I'm setting up the server for friends and me to share files and I have the feeling that what you wrote on your last reply might be the answer to the problem. Thanks a lot! ----- Original Message ----- From: "Ben Yau" <byau@xxxxxxxxxxxxxxxx> Date: Wed, 28 Jan 2004 10:41:04 -0800 To: "redhat list" <redhat-list@xxxxxxxxxx> Subject: RE: Problem reaching ftp server on my LAN through the internet > > > > > > > > > > > Hi. > > > > I'm a linux newbie and I'm trying to set up an ftp server on a > > > > LAN. The server is up and running on redhat 9.0. > > > > The server is conected to a LAN with other Linux and windows > > > > computers through a wireless gateway attached to a cable modem. > > > > I have a static IP asigned by my ISP so I can access the gateway > > > > (and therefore the ftp server) from anywhere over the internet. > > > > > > > > The problem is that when I log into the server from any box > > > > within the LAN using the external IP address (going outside the > > > > LAN to the internet and then coming inside again) I get this error: > > > > > > > > ftp> ls > > > > 500 Unknown command. > > > > 227 Entering Passive Mode (192,168,1,19,229,168) > > > > 500 Illegal PORT command. > > > > ftp: bind: Address already in use > > > > > > > > But if I log into it using the internal IP address or from > > > > anywhere outside the LAN using the external IP address (over the > > > > internet) the ftp server works just fine. I thought that maybe > > > > either the server or the gateway where blocking the access with a > > > > firewall but if that where the case, I wouldn't be able to even > > > > log into the server right? > > > > I hope I was clear, english isn't my first languaje but please do > > > > write if you have any idea. Any help is greatly apreciated > > > > > > > > > > Even though this flag is said to have no effect anymore, try > > starting the > > > ftp sessoin anyway with the -p flag on and see if it works > > > ftp -p > > > It's meant to start the ftp session as passive right off the bat. > > > > > > > Thanks Ben. > > I tried it out but it didn't work. > > Thanks anyway > > > > > > Is this an academic exercise by the way? YOu are just wondering why it does > that? Since internal clients should access your ftp site internally as a > good rule of thumb. > > Anyway, I have a feeling it's just something that happens with the firewall > since you are natting out and then coming back in again. The ftp server > responds back to client telling client to use port XXX. This response goes > back out the firewall and in again to the client. The client then attempts > to open on that port back out through the firewal but it's already in use on > the firewall by the server so you get that "Address already in use" error. > So it supposed to happen that way. > > My best guess. > > Ben > > > > > > -- > redhat-list mailing list > unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe > https://www.redhat.com/mailman/listinfo/redhat-list -- ___________________________________________________________ Sign-up for Ads Free at Mail.com http://promo.mail.com/adsfreejump.htm -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list
