Security practitioners for decades have advised people to limit DNS queries against their DNS servers to only use UDP port 53. The reality is that DNS queries can also use TCP port 53 if UDP port 53 ...

Pretty normal setup here, 3 interfaces, inside, outside, and voip, the voip interface only needs access from (inside) for management, I am seeing tons of these errors in ...

Our Cisco 2921 is blocking an specific UDP port outbound. The 2921 has the firewall enabled. So far I'm stumped - I've added an ACL to allow the traffic, created a user defined service and added that ...

Cisco’s Network Admission Control can be directly mapped to TCG’s NAC architecture. However, because Cisco is bound by the revenue reality of its installed base, the architecture comprises both ...

In newly disclosed real-world attacks, threat actors are found exploiting a Cisco Simple Network Management Protocol (SNMP) vulnerability to gain remote code execution (RCE) and install Linux rootkits ...