Cisco Discovery Protocol (CDP) is a link layer discovery protocol that has been integrated into Cisco switches and routers ever since I can remember. Cisco introduced CDP support into their routers ...

I'm trying to set up a VPN using Windows 2k server and in order to do it I understand that I need to forward a port #1723 as well as IP Protocol 47 (GRE). <BR><BR>I can forward the port just fine, but ...

Cisco has released a fix to a flaw in a popular communications protocol that some experts said could take down the Net and has announced a new, unrelated security bug. After the United Kingdom's ...

Integrated Services Digital Network (ISDN) provides for digital transmission over ordinary telephone copper wire as well as over other media uses. In this continuation of his tip on ISDN ...

09/01/20 Update below. This post was originally published on August 31st, 2020. We updated it to reflect that there are two actively exploited DVMRP Memory Exhaustion Vulnerabilities according to ...

For the past few weeks attackers have been probing networks for switches that can potentially be hijacked using the Cisco Smart Install (SMI) protocol. Researchers from Cisco’s Talos team have now ...

Threat actor APT28 targets Cisco routers with an old vulnerability Your email has been sent Threat actor APT28 is exploiting an old vulnerability in Cisco routers ...