firewall configuration

[Leonidas Tsabos]

fisika kai oxi ta incoming filtraronte pali apo ena analogo chain
policy drop kai profanos stirizome se ena genikotero kanona
poy kanei ta -p tcp -m state --state RELATED,ESTABLISHED -j ACCEPT gia na 
dexome paketa ego (dld na boro na kano browse).
Oson afora ta services pezoyn rules toy styl 
iptables -p --dport 22(h 80) -m state NEW -j ACCEPT.
fiska kano drop kai ta incoming icmp paketa.
afto poy den exo katalavatei einai kati paketa poy erxonte kapoies stigmes kai 
einai typoy igmp(den to exo ksanakoysei afto ) kai kapoia udp ta opoia kovo 
alla ta vlepo meso iptraf prin kopoyne. Apla afti htan h aporia moy. 
Afta.Efxaristo kai pali