1 | Management and systems personnel often assume that if they have a firewall, they have sufficient security and no further security checks are needed |
2 | Some network services (like ftp, http, sendmail, telnet) are passed through the firewall |
3 | External |
4 | network |
5 | Internal |
6 | Mail, DNS, NIS, FTP |
7 | Print, NFS, WWW |
8 | Web |
9 | Server |
10 | Firewall |
11 | DNS |
12 | Multi-homed firewall |