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- Hardware and OS Related Technologies
-- Linux, Unix, and *nix like Operating Systems
---- proftpd:421 Service not available, remote server has closed connection
wa_desert_rat - 4:08 pm on Apr 7, 2013 (gmt 0)Thread source:: http://www.webmasterworld.com/linux/4546287.htm
Check to see if proftp is running (ps xa | grep ftp). If it's not, start it (probably in /etc/inet.d).
If it's running and is still unavailable check to see if there is a firewall running and, if so, add a rule to allow tcp/udp to Port 21.
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