@book{32717,
	author = {Nasir Ali, Shoaib Hassan Siddiqui, M. Wajahat Najeeb Siddiqui & Syed Muhammed Danish Imam},
	title = {Implementation of Network Security Through PIX Firewall},
	publisher = {UITU,},
	year = {2003},
	address = {Karachi:}
}