Feature Request: UDP Port Scanning

Andrew any possibility to have the option to scan UDP ports as well as the TCP ports. Maybe toggle it on or off? Thanks.

There are a few UDP services already that the network scanner can discover.

Discovering any UDP port is technically challenging and not anywhere near reliable.

Wikipedia has more info on this.

Thanks for all the extra information.

The other day I found 3 Rogue DHCP servers on our network. I thought that DHCP might be the issues but all the utilities I used could not find or see any DHCP servers except for our REAL DHCP servers for some reason. I had another network guy help me and we used WireShark to finally discover why I was having DHCP issues; we found 3 DHCP servers and I was hoping NetScan would have found them. I used NetScan several times to see if it could find them now that I knew where they were and what IP addresses they were at, but NetScan could not see them no matter how much I tweaked NetScan. With your wiki page link, I now understand that UPD is hard to scan for. Many Thanks -WS

With DHCP is a different story. Generally there's no need to scan for a specific port.

The network scanner broadcasts a DHCP query and expects any (rogue or legitimate) server to respond.

This didn't work for you?

Unfortunately it does not see the Rogue DHCP servers. I does see my real DHCP servers on Windows Server 2008 R2. The Rogue Servers (3 of them) were on a *IX box OS unknown, clever. -WS