I can confirm problems with ssh on theopenlab: [zuazaga at aleph zuazaga]$ slogin -V SSH Version 1.2.26 [i686-unknown-linux], protocol version 1.5. [zuazaga at aleph zuazaga]$ slogin -l humberto bioinformatics.org Connection closed by remote host. I suspect /etc/host.allow or deny rules. ssh uses tcpd style access controls. try putting sshd:ALL:allow in /etc/hosts.allow