Draytek Vigor Router Port Forwarding
KB ID 0000425 Problem This procedure was carried out on a Draytek Vigor 2800 Router, for this I needed to forward RDP (That’s on TCP Port 3389). Warning: If you need to forward any of the following ports 23 (Telnet), 80 (HTTP) , 443 HTTPS/SSL), 21 (FTP), or 22 (SSH). The Draytek has these reserved for remote management. You will need to change the port number (system Maintenance > Management > Management Port Setup)....
Windows – ‘Telnet’ is not recognized as an internal or external command
KB ID 0000455 Problem Telnet client from Windows, and have it as an “Optional Extra”. For most people that’s fine, but for anyone who programs network devices, or needs to test that ports are open, or test mail flow by telnet to port 25, that’s a pain. Solution Enabling Telnet – Windows 10 1. From PowerShell execute the following command; dism /online /Enable-Feature /FeatureName:TelnetClient Enabling...
Cannot Remote Desktop over VPN connection
KB ID 0000845 Problem This one had me well and truly stumped! The client has two sites and from their remote site they could not open a remote Desktop connection to a server at the main site. RDP Stuck at Securing remote connection. At first, because the client had SBS at their main site I assumed this was the problem, but sadly it was not. Solution The following process goes through the steps taken to identify and rectify the...
Cisco ASA Disable ESMTP Inspection
Telnet to Exchange on Port 25 shows a row of Asterisks? KB ID 0000536 Problem Yesterday my colleague Ben called me over to the help-desk and asked “Have you ever seen this before?” This was what was on his screen. 220 *************************************************** Solution Usually when you Telnet to an Exchange server it gives you a 220 message followed by the “Banner” of the Exchange server, a little...
Exchange – Are you an Open Relay?
KB ID 0000087 Problem When Email was a new medium, pretty much all mail servers were open relays, and nobody really cared, after all if someone in Nigeria wanted to relay mail through a college server in Manchester then why shouldn’t they? Sadly with the explosion of Email and internet use this is no longer an option, because all those annoying Emails you get for Viagra or insider stock tips have probably been sent to you...