The Boston Diaries

The ongoing saga of a programmer who doesn't live in Boston, nor does he even like Boston, but yet named his weblog/journal “The Boston Diaries.”

Go figure.

Tuesday, November 28, 2006

Today's issue

Nothing worse than trying to debug FTP issues in the presense of firewalls.

FTP is a really old protocol that due to the way it works, makes it difficult to support properly when there are firewalls at both the client side and the server side, primarily because by default, whenever the server wants to send data to the client, the server initiates a connection back to the client. Sure, there's passive mode, but that just means that the server tells the client to connect on a different (and usually blocked) port on the server for the data.

It's especially frustrating when these things suddenly stop working.

Grrrrr.

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