MLF: A Technology beyond ALF for Network Security

Network and web security measures are now having utmost attention and so the use of firewall, which is vigilant to scrutinize incoming-outgoing packets between private network and Internet. The decision is usually relied upon the source/destination address or port number. Even high end technologies and higher layer protocols like DNS, SMTP, POP3 etc. are also vulnerable and susceptible to be exploited. This urges to redefine the role and scope of firewalls. This paper defines the functions of existing firewalls and various filtration techniques along with their limitations and shortcomings. Further the new schema of MLF (Multi-Layer Filtering) for enhanced network security and to obstruct obnoxious sites is proposed. The security from intruders and attackers is not only based on their IP addresses or their content but through an adoptable method for which a new architecture is proposed.