12-07-2012, 03:06 PM
internet firewalls
[attachment=27510]
introduction
A firewall is a hardware device or a software program running on the secure host computer that sits between the two entities and controls access between them.
A computer networking firewall implements a security policy either-
in respect of network traffic traversing a router or gateway operating between 2 networks, or
on a host computer in respect of network traffic between one or more of that host computer’s network connection and the host computer itself.
Need of firewall
Protection from Hurmfull Services.
Controlled access to Site System.
Concentrated Privacy.
Enhanced Privacy.
Logging & Satistics on Network use, misuse.
Policy Enforcement.
advantages
Concentration of Security.
Protocol Filtering.
Information Hiding.
Centralized & Simplified Network Services Management.
Extended Logging.
disadvantages
Concentrates security in one spot as opposed to distributing it among systems.
High cost.
Firewalls can’t protect very well against thing like Viruses.
[attachment=27510]
introduction
A firewall is a hardware device or a software program running on the secure host computer that sits between the two entities and controls access between them.
A computer networking firewall implements a security policy either-
in respect of network traffic traversing a router or gateway operating between 2 networks, or
on a host computer in respect of network traffic between one or more of that host computer’s network connection and the host computer itself.
Need of firewall
Protection from Hurmfull Services.
Controlled access to Site System.
Concentrated Privacy.
Enhanced Privacy.
Logging & Satistics on Network use, misuse.
Policy Enforcement.
advantages
Concentration of Security.
Protocol Filtering.
Information Hiding.
Centralized & Simplified Network Services Management.
Extended Logging.
disadvantages
Concentrates security in one spot as opposed to distributing it among systems.
High cost.
Firewalls can’t protect very well against thing like Viruses.