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FTP site access

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by robinarm

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I'm having a problem conecting to an FTP site on an NT4 server running MS Proxy 2 and IIS4. When accessing the site via the LAN, if I type (on the command line) "ftp ftp.domainname.co.uk" I get a message saying ftp: connect: 10061
then if I try a "dir" I get a message saying I'm not connected. I can connect with "ftp www.domainname.co.uk" (via the LAN) and log in as normal, I can also connect through the network using "ftp servername" I only get the error using "ftp ftp.domainname.co.uk".

Using the Internet to access the same site I get that message regardless of the name I use (ftp. www.). The company I work for leases an ISDN line and Cisco Router from a fairly large and well respected company and they also handle our DNS records. I've asked them to check out their end but so far they say they can see nothing wrong. The FTP site was working fine until just recently our E-mail server and Internet access is fine also (we don't presently host a WWW site).

Any ideas??

9 replies

by tbradley

The answer is definitely in the DNS setup. Try connecting directly using tcp/ip, as in

c:\ftp xxx.xxx.xxx.xxx

If you connect with no errors, either via the Lan or the Internet, it will prove the point.

This may be such a simple solution, I don't even know how to put it into words, but if they are using IIS, simply have them turn on the www services, same domainname.co.uk, and see if the problem goes away. Since the domain name is taken, they can have it active, with no access given, and not be losing anything by it, other than a small bit of server overhead.

by robinarm

Sorry for not getting back sooner but I was ill.

The problem first appeared when one of our customers coundn't access the ftp site. The problem was actually really stupid - they had misread their password and used o (letter 'oh') instead of 0 (zero). When I tried to access the site to check their username and password were working, MS Proxy Client on my machine allowed me access through the LAN no bother but confused the issue when I accessed the site with a modem and an independant ISP (coming in through the firewall). This is the first time MSP client has interfered with my internet access via a modem. When I first tested the site I used the modem on the same machine and I can't remember MSP Client stopping me gaining access. It must be to do with the WinSock Client uses.

by robinarm

Some more info regarding the problem.

Through the Lan I can;
C:\FTP XXX.XXX.XXX.XXX (internal IP address)
C:\FTP XXX.XXX.XXX.XXX (external (internet) address)
C:\FTP WWW.DOMAINNAME.CO.UK
I can also ping both IP addresses as well as the www and ftp.domainname.co.uk

Through the LAN I cant;
c:\ftp ftp.domainname.co.uk

Through the Internet I can ping www and ftp.domainname.co.uk

Through the Internet I can't;
c:\ftp ftp.doaminname.co.uk
c:\ftp www.domainname.co.uk
c:\ftp xxx.xxx.xxx.xxx external (IP)

All services seem to have started and local DNS records have not changed - their modified date is prior to the date the FTP site was fully functional!

by z

here is a simple troubleshooting tool:

telnet ftp.whatever.co.uk 21 in 2000(or specify port 21 in the win98/nt telnet)

you should get a session that says 'microsoft ftp server version 4.0' or something like that.

if you do, get an ftp client and junk that command line one - try tucows.com - they have tons of them for free

if you don't, do the same but put in an ip instead of the name. if it doesn't work (and you can ping it), there are only 3 thing's it could be: 1) the ftp port is something other than the standard 21. 2)your firewall won't let you connect. 3) the iis server is cfgd so it only accepts certain hosts.

This last thing actually may be your problem. If it connects and immediately disconnects, then the remote machine is configured not to accept a connection from your specified ip address, domain name, or whatever. hope this helps.

by robinarm

Sorry for not getting back sooner but I was ill.

The problem first appeared when one of our customers coundn't access the ftp site. The problem was actually really stupid - they had misread their password and used o (letter 'oh') instead of 0(zero). When I tried to access the site to check their username and password were working, MS Proxy Client on my machine allowed me access through the LAN no bother but confused the issue when I accessed the site with a modem and an independant ISP (coming in through the firewall). This is the first time MSP client has interfered with my internet access via a modem. When I first tested the site I used the modem on the same machine and I can't remember MSP Client stopping me gaining access. It must be to do with the WinSock Client uses.

by z

here is a simple troubleshooting tool:

telnet ftp.whatever.co.uk 21 in 2000(or specify port 21 in the win98/nt telnet)

you should get a session that says 'microsoft ftp server version 4.0' or something like that.

if you do, get an ftp client and junk that command line one - try tucows.com - they have tons of them for free

if you don't, do the same but put in an ip instead of the name. if it doesn't work (and you can ping it), there are only 3 thing's it could be: 1) the ftp port is something other than the standard 21. 2)your firewall won't let you connect. 3) the iis server is cfgd so it only accepts certain hosts.

This last thing actually may be your problem. If it connects and immediately disconnects, then the remote machine is configured not to accept a connection from your specified ip address, domain name, or whatever. hope this helps.

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