Remote user cannot connect via FTP

[William McElvain]

I have a user who gets the following error when he attempts to ftp to my server (HP L2000). Error 530 peer has closed connection.
I'm fairly sure that I am not blocking him, and I think it's a firewall that is blocking him, but I didn't think that he would even get to the login screen if he was beening blocked by a firewall. Any suggestions?

[Jeff Schussele]

Hi William,

A lot of people forget that it takes 2 ports to ftp something - 20/tcp (Data) & 21/tcp (Control)
I suspect that 21 is open & allowing the login but 20 is not & when the data tries to go & gets blocked the server closes the control port.

Have the user try to
telnet hostname 21
telnet hostname 20
see if both can connect or get refused - If so they're reaching the server. If they hang they aren't reaching it.

Rgds,
Jeff

[William McElvain]

Thanks Jeff,

I was finally able to get a hold of their network folks and was able to get them to check the access between our IP's. They made some changes and presto it works again. Thanks for the input. I'll add that to my troubleshooting tricks.