Ena programma pou leitourgei ws server (epitrepei se alla programmata na enothoun panw tou) "akouei" se ena sinkekrimeno port (arithmos apo 1-32000) gia aitiseis sindesis (connection requests). Otan exeis ena e3wteriko IP ke pollous upologistes sto diktio. o xristis (client) pou enonnete me to programma tou panw sou pliktrologei to e3wteriko ip. O router omws den 3erei se pio apo ola ta computer tou diktiou trexei to programma tou server oste na tou diavibasei tin aitisi sindesis. me to port forwarding leme ston router, otan px kapios ziteisei na enothei sto port me arithmo 13, enose ton me ton ipologisti me esswteriko ip 192.168.1.101 (pou trexei to antistixo server).
Px an egw sto pc mou (eswteriko ip: 192.168.1.101) trexw ena Webserver sto port 80. ke lew se ena filo mou na mpei stin selida mou http://MY.EXTERNAL.IP:80 tote o web-browser tou (webclient) enwnnete me ton router, o opoios 3erei oti to port 80 8a ginei forward(parapempei) sto computer me eswteriko ip: 192.168.1.101. pou trexei ton webserver ke oxi se allo computer tou diktiou.
Tetio problima den parousiazete sto Bridge mode omws epidi dexetai mono ena upologisti na enw8ei sto modem ke etsi oles oi aitiseis sindeseis diavivazontai sto sinkekrimeno computer. Isws giafto na erxontai me default to bridge mode ta modem tis cyta.