[plug] cannot ssh server

[Jon Miller]

I've been trying to access my server from an internal linux wkstn and I
keep getting the following:

ssh_exchange_identification: Connection closed by remote host


I've disable the firewall except for the following three commands
echo 1 > /proc/sys/net/ipv4/ip_forward
iptables -A POSTROUTING -t nat -o eth1 -j MASQUERADE
iptables -A INPUT -p tcp --dport 22 -j ACCEPT

I still can not access the server any ideas?