Incomming packets

[serguey.forcade@xxxxxxxxxxxxxxxxx]

Hello:

    I'm trying to set a rule in my iptables configuration to accept incomming connections from an specific host, (ie. iptables -A input -i eth0 -p tcp --dport 21 -s test.host -j ACCEPT ) and I keep getting the error:

iptables v1.2.6a: host/network `test.host' not found
Try `iptables -h' or 'iptables --help' for more information.

Does anyone know about it?

Thanks