I cannot update fedora packages (ALSA) from my internet gateway. The SSH access for cvs.fedoraproject.org from my host - gate.perex.cz (212.20.107.50) - is rejected:

[perex@t61 ~]$ ssh -v cvs.fedoraproject.org
OpenSSH_4.7p1, OpenSSL 0.9.8b 04 May 2006
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug1: Connecting to cvs.fedoraproject.org [209.132.176.51] port 22.
debug1: Connection established.
debug1: identity file /home/perex/.ssh/identity type -1
debug1: identity file /home/perex/.ssh/id_rsa type 1
debug1: identity file /home/perex/.ssh/id_dsa type 2
ssh_exchange_identification: Connection closed by remote host

Connections from other IP hosts works well.