Occasional PCs picking up wrong DNS
I've three or four PCs that are picking up the wrong IP address for one of my servers. They can browse the server using mapped drives or by going to \\server1 in explorer but when I try to ping the server it attempts "pinging server1 [22.214.171.124]" and fails. The IP address shown is a completely incorrect address that is nothing like anything else on my network. I've looked at the DNS servers and the strange IP doesn't appear anywhere. I'm not sure where these machines have got that IP from? Thanks.