Firewall Rules ...

[Jiannis Mitsos]

Loipon exoume to e3hs sxhma :

---------      -----------------	 
| cisco |---->|eth0		|
---------     |	Linux Box	|	 ------------
	      |		    eth1|------->| LAN      |
	       -----------------         ------------
To Linux einai ousiastika mono gia firewall ( h kalytera prospa8ei na 
ginei firewall :-(   ) Apo thn meria tou kernel einai ok ...
exw 8esei ta e3hs rules :
ipfwadm -F -p deny 
ipfwadm -F -f
ipfwadm -I -f
ipfwadm -F -a accept -b -P tcp -S 0.0.0.0/0 1024:65535 -D 
ena.host.mesa_sto_lan 21

alla parolayta den mporw na kanw ftp apo ena allo diktyo sto 
ena.host.mesa_sto_lan gnwrizei kaneis tipota epi tou 8ematos ???
kai epipleon epeidh den katalaba sto man ipfwadm to 1024:65535 ti 
akribws kanei ?? sto linux exw balei 3-4 static routes (tosa mhxanhmata 
exw sto LAN)
Epishs ola ta mhxanhmata exoun IP  tou styl AAA.BBB.CCC.xxx opou to xxx 
metaballetai ...
Ayta ta oliga 

Yannis Mitsos 

gmitsos at duth.gr

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