under attack

["Jorge Garcia" <anarkophobia () linuxmail org>]

i discovered in my redhat server a openssh port open in port 1945 or somethin like that.
now i filter the port with iptables but i want to do more.
how can i close the port??
how can i get info about who did this and which program or prosses is using this port?
how can i get any inpho about the attacker??
thanx

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