[CentOS] Problems with SSH

Hi, i have 2 linux machines on a corporative network, from my machine(Local Machine)i Have ssh acces to the serer typing ssh user@nombreservidor But when i try to connect from the server to my local machine i have a message "name or service not known", it doesn`t matter if i do it ss user or as root If i type ssh user@iplocal i have a message "no route to host" it already verified that both systems(local and server) have SSH running by typing service sshd status, and the response is "ssh is running (pidxxxx) The OS in the local machine is CentOS 4.3 in the server is WhiteBox 4

Anyone have aan idea? please, I need help Thanks

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