1. Cheswick, W.R., Cheswick, S.M.: Firewalls and Internet Security: repelling the willy hacker. Addison Wesley, Reading (1994)
2. Brent Chapman, D., Zwicky, E.D.: Building Internet Firewalls. O Reilly & Associations, Inc. (Janyary 1996)
3. Hare, C., Siyan, K.: Internet Firewalls and Network Security, 2nd edn., New Readers (1996)
4. Stallings, W.: SNMP, SNMP v2, SNMP v3, and RMON 1 and 2, 3rd edn. Addison Wesley, Reading (1999)
5. Perkins, D., McGinnis, E.: Understanding SNMP MIBs. Prentice Hall PTR, Englewood Cliffs (1997)