Hi, This is probably going to sound like a silly question.
I have a smoothwall firewall (just thought i'd say the name incase anyone knows of any vulnerabilities) protecting the compaines network.
I have done an NMap stealth scan and I can see only 4 ports are open (22, 25, 110, 80), these forward to services on the orange zone.
Also, we have a router/modem connected to the smoothwall box... the 4 ports have been forwarded to the smoothwall box and I have manually created a filtering rules so that inbound traffic from: 0-21, 23-24, 26-79, 81-109 and 111-65535 is blocked.
Just for you guys that dont know, with smoothwall you can have 2 seperate networks, 'green and 'orange'.. the green is protected by the firewall and the orange is a DMZ... which is used for serivces i.e. webserver... if a 'hacker' go into a service on the orange zone, they shouldnt be able to talk to the green zone.
Now heres the question:
can a hacker can only connect to those 4 open ports and nothing else? so if I didnt have any oprts open there would be no way they can connect to anything of the companies and try to 'hack' into the network (especially being as there is a router infront)?
Also, one other thing.. as smoothwall is a linux based firewall, is it possible to 'hack' into it, if it dosnt have any ports open from the outside?
cheers for you info.