Labas,

situacija butu tokia yra: router(unix) -> uz jo desktop(linux)

ant routerio sudeti port forward i  tcp: 9091 tcp:51413 ir udp 51413, 
kaip teinsingai uzrasyti iptables taisykles desktopui kad veiktu taip 
pat tvarkingai kaip ir be ju. Mano iptables siuo metu atrodytu taip

#!/bin/sh
# My system IP/set ip address of server
SERVER_IP="192.168.1.253"
# Flushing all rules
iptables -F
iptables -X

# Setting default filter policy
iptables -P INPUT DROP
iptables -P OUTPUT DROP
iptables -P FORWARD DROP

# Allow unlimited traffic on loopback
iptables -A INPUT -i lo -j ACCEPT
iptables -A OUTPUT -o lo -j ACCEPT


#Allow transmission web interface
iptables -A INPUT -p udp -m udp --dport 51413 -j ACCEPT
iptables -A INPUT -p tcp -m tcp --dport 51413 -j ACCEPT
iptables -A INPUT -p tcp --dport 9091 -j ACCEPT



# make sure nothing comes or goes out of this box
iptables -A INPUT -j DROP
iptables -A OUTPUT -j DROP

dekui uz patarimus