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Slow connections with ProFTPD

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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This entry was posted on Tuesday, May 29th, 2007 at 16:02 and is filed under Features, General. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

5 Responses to “Slow connections with ProFTPD”

  1. Roy says:
    7 January, 2008 at 21:12

    Im having the same problem but this doesnt help me out.

  2. Leo says:
    11 August, 2008 at 02:55

    I had the same issue, this fixed it.

    Thanks!

  3. Kog says:
    26 November, 2008 at 19:51

    Try adding the following lines to your conf:

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

  4. Martin Steen says:
    23 June, 2009 at 16:43

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

    Thank you! That helped me a lot!

  5. Steven says:
    17 January, 2010 at 12:18

    This speed up me FTP server too… Thank you!!!!

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