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Slow connections with ProFTPD

May 29th, 2007
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My shiny new VPS, which is running Ubuntu Linux, uses ProFTPD for FTP access. Today I noticed that setting up the connection takes about 5 to 10 seconds. This is really annoying when editing files through FTP.

So, I investigated and found that by default ProFTPD tries to revolve the hostname of the client in order to put that in the logs instead of a plain IP address. This lookup can take quite some time, let’s say 5 to 10 seconds, especially when the look up fails and you have to wait on a time-out.

It’s easy to stop ProFTPD from behaving like this by adding the following line to your proftpd.conf in /etc/proftpd:

IdentLookups off

Restart ProFTPD and you’ll have a fast FTP connection to enjoy!

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  1. Roy
    January 7th, 2008 at 21:12 | #1
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    Im having the same problem but this doesnt help me out.

  2. Leo
    August 11th, 2008 at 02:55 | #2
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    I had the same issue, this fixed it.

    Thanks!

  3. Kog
    November 26th, 2008 at 19:51 | #3
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    Try adding the following lines to your conf:

    UseReverseDNS off
    IdentLookups off
    ServerIdent on “FTP Server ready.”

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