We are having an issue when we try to ssh or sftp to our linode server. We flushed the IPTABLES and were able to connect in with no problem. Once I restored the iptables we are no longer able to connect. Following is the iptable we have in place. Can someone please tell me if they see any issues?

ACCEPT udp -- anywhere anywhere udp dpt:20 state NEW,ESTABLISHED
ACCEPT udp -- anywhere anywhere udp dpt:fsp state NEW,ESTABLISHED
ACCEPT udp -- anywhere anywhere udp dpt:domain state NEW,ESTABLISHED
ACCEPT tcp -- anywhere anywhere tcp dpt:https state NEW,ESTABLISHED
ACCEPT tcp -- anywhere anywhere tcp dpt:www state NEW,ESTABLISHED
ACCEPT tcp -- anywhere anywhere tcp dpt:ssmtp state NEW,ESTABLISHED
ACCEPT tcp -- anywhere anywhere tcp dpt:smtp state NEW,ESTABLISHED
DROP icmp -- anywhere anywhere limit: avg 15/sec burst 5
REJECT all -- anywhere anywhere reject-with icmp-host-prohibited

Chain FORWARD (policy DROP)
target prot opt source destination
REJECT all -- anywhere anywhere reject-with icmp-host-prohibited

Chain OUTPUT (policy ACCEPT)
target prot opt source destination
ACCEPT udp -- anywhere anywhere udp spt:20 state ESTABLISHED
ACCEPT udp -- anywhere anywhere udp spt:fsp state ESTABLISHED
ACCEPT udp -- anywhere anywhere udp spt:domain state ESTABLISHED
ACCEPT tcp -- anywhere anywhere tcp spt:ssh state ESTABLISHED
ACCEPT tcp -- anywhere anywhere tcp spt:https state ESTABLISHED
ACCEPT tcp -- anywhere anywhere tcp spt:www state ESTABLISHED
ACCEPT tcp -- anywhere anywhere tcp spt:ssmtp state ESTABLISHED
ACCEPT tcp -- anywhere anywhere tcp spt:smtp state ESTABLISHED
ACCEPT tcp -- anywhere anywhere tcp multiport sports tcpmux:63665 state
NEW,ESTABLISHED
ACCEPT icmp -- anywhere anywhere icmp any

Chain fail2ban-ssh (1 references)
target prot opt source destination
RETURN all -- anywhere anywhere
root@www:~#

All was working up till this morning and we have not made any changes.

Thanks

You don't have a rule in the INPUT chain allowing traffic to port 22 (dpt:ssh). You'll need to add one using whatever mechanism you're using to generate firewall rules.

Edit: oops, this was already answered elsewhere.