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Posts published in “Cisco”

Cisco switch security features cheatsheet

Shahriar 0

Cisco switches (running IOS) have plenty of features that are critical to modern networks. Some are Cisco security features that eliminate several important attack vectors on layer 2. This is arguably the most important defense mechanism because ACLs and security mechanisms on software (layer 7) will sometimes fall short protecting…

GRE over IPSec in Cisco IOS

Shahriar 0

Cisco GRE over IPSEC In the following is a sample configuration for GRE/IPSEC in Cisco IOS devices. you can tailor this to your needs (changing encryption algorithms, IP addresses etc), just remember to make sure they are the same on both sides (except for IP of course). In later posts…