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Network Security Tutorial - APNIC

Network Security Tutorial Contact: Overview Network Security Fundamentals Security on Different Layers and Attack Mitigation Cryptography and PKI Resource Registration (Whois Database) Virtual Private Networks and IPsec Network Security Fundamentals Network Security Workshop Overview Why We Need Security Definitions and Concepts Access Control Risk vs. Vulnerability Threats and Attack Types Why Security ? The Internet was initially designed for connectivity Trust assumed We do more with the Internet nowadays Security protocols are added on top of the TCP/IP Fundamental aspects of information must be protected Confidential data Employee information Business models Protect identity and resources We can t keep ourselves isolated from the Internet Most business communications are done online We provide online services We get services from third-party organizations online Internet Evolution Different ways to handle Security as the Internet evolves LAN connectivity Application-specific More online content Cloud computing Application/data hosted in the cloud environment Why Security ?

– Saturating the target with external communications requests (such that it can’t respond to legitimate traffic) – SERVER OVERLOAD – May include malware to max out target resources (such as CPU), trigger ... TCP, UDP Layer 5: SMB, NFS, Socks Layer 7: DNS, DHCP, HTTP, FTP, IMAP, LDAP, NTP, Radius, SSH, SMTP, SNMP, Telnet, TFTP Ping/ICMP ...

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