DHCP Snooping Concept/Implementation

DHCP Snooping is a layer 2 security technology built into the IOS of a switch. The switch will drop DHCP Server messages in order to prevent unauthorized/rogue DHCP servers from offering IP addresses to DHCP clients. This is a very valuable security measure that can be used to help mitigate the network from attacks. DHCP… Read More »

Cisco Port-Security Concept/Implementation

Cisco port security is a layer 2 traffic control feature used to protect the network from unknown devices which may be plugged into the network either via a network point in a publicly available space or by a malicious user who has physical access to a network point. Port security works by first setting a… Read More »

“You must disable Sophos Tamper Protection before you continue. Contact your administrator or see Sophos KBA119175”.

You may have come across an issue where you have deleted a Server or workstation from Sophos Central not realising that by default these devices are protected for “Tamper Protection”.   So now on the local machine you are attempting to uninstall “Sophos” but you can’t and keep getting an error “You must disable “Sophos… Read More »

Solarwinds TFTP Server

Download: SolarWinds TFTP Server To use the Solarwinds TFTP server, simply download, unzip and install. The server will start when the application is launched and will be listening on the standard port “UDP 69”   The default file location is C:\TFTP-Root. This can be changed if required by selecting “File-Configure” If any issues are encountered… Read More »

Paping TCP Port Tester

Paping is used for testing TCP ports, a very useful tool that helps with troubleshooting network issues. Syntax paping.exe 192.168.0.1 -p 443 -c 5 Download paping,rar