cisco security
beginner
Firewall Basics with Cisco Zone-Based Firewall
Build a two-zone ZBFW policy on a Cisco router and prove that only intended traffic crosses between zones.
intermediateSite-to-Site VPN Basics with IPsec
Build an IPsec site-to-site tunnel between two routers and verify both IKE phases actually complete.
beginnerNetwork Segmentation: Containing a Compromised Host
Isolate a compromised VLAN with an ACL so it cannot reach the rest of the network, without disconnecting the host entirely.
beginnerSecurity ACL: Least-Privilege Access Between VLANs
Write a deny-by-default extended ACL that permits only the specific traffic two departments actually need.
beginnerPacket Analysis with Wireshark: Spotting Plaintext Risk
Capture live traffic and use Wireshark to identify plaintext credentials and suspicious traffic patterns.