earticle

영어

Corporate mail services are designed to perform better than public mail services. Fast
mail delivery, large size file transfer as an attachments, high level spam and virus protection,
commercial advertisement free environment are some of the advantages worth to mention.
But these mail services are frequent target of hackers and spammers. Distributed Denial of
service attacks are becoming more common and sophisticated. The researchers have
proposed various solutions to the DDOS attacks. Can we stop these kinds of attacks with
available technology? These days the DDoS attack through spam has increased and disturbed
the mail services of various organizations. Spam penetrates through all the filters to establish
DDoS attacks, which causes serious problems to users and the data. In this paper we propose
a novel approach to defend DDoS attack caused by spam mails. This approach is a
combination of fine tuning of source filters, content filters, strictly implementing mail policies,
educating user, network monitoring and logical solutions to the ongoing attack. We have
conducted several experiments in corporate mail services; the results show that this approach
is highly effective to prevent DDoS attack caused by spam. The novel defense mechanism
reduced 60% of the incoming spam traffic and repelled many DDoS attacks caused by spam.