Microsoft FTP fails to connect after the client requests the list of features (FEAT)

Posted by Max on Server Fault See other posts from Server Fault or by Max
Published on 2010-07-23T11:17:04Z Indexed on 2010/12/31 0:56 UTC
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This is a really weird problem. The first few times I try to connect Filezilla just hangs on the line 211-Extended features supported: for a while before coming up and saying Error: Could not connect to server. The filezilla log below:

Command:    PASS ***********
Response:   230 User logged in.
Command:    FEAT
Response:   211-Extended features supported:
Error:  Could not connect to server

The weird thing is if I keep trying to connect eventually it just works and connects fine. After Filezilla knows which features the server supports it stops asking for a while which enables you to connect first time until Filezilla decides it wants to double check the features list again. I'm at a loss on how to debug this.

Has anyone experienced similar?

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