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DNS resolving to VPN concentrator (local PC cache?)

Last night, I VPN'ed to the vpn concentrator at work from a computer at my house called (hostname) Zarathustra (just a standard windows VPN connection).  After that, I was able to remote desktop thru the standard windows MSTSC (RDP) terminal services app to several computers at work.  On one computer in particular, I have redirected RDP to accept incoming connections over port 22, so that I can remote desktop directly to that computer without VPN first (because that port 22 is allowed in past the work firewalls whereas 3389 is not).

When I got to work today, and I pinged the hostname Zarathustra, I found that it resolved to the IP of the VPN concentrator.  The domain where my office workstation is located has DNS servers, but I'm pretty confident they do not allow dynamic updates (the whole org is static IP --- UHG!!).  Anyhow, I am also pretty confident there are no WINS servers on the domain, so I'm left with, Netbios cache or something (I am skeptical that this was a leftover from a switch/router table).  Any theories?

PS.  HYPERLINKS to internet accessible references are appreciated and rewarded  :-)
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ksuchy
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ksuchy
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ksuchyAuthor Commented:
Note that the host Zarathustra is strictly a DHCP machine, which gets it's IP from a router at my house prior to establishing contact with the VPN at my work location.  The VPN server therefor has to somehow give it a temporary dynamic IP for the VPN-adapter after authentication and authorization from
Radius.
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NopiusCommented:
> and I pinged the hostname Zarathustra
ping uses either NetBIOS NS resolution or DNS resolution, so I guess your home PC is resolvable via NetBIOS.

To be sure (that it's not a DNS issue) run 'nslookup  Zarathustra' if it says nothing, then you are using NetBIOS name.

>  Anyhow, I am also pretty confident there are no WINS servers on the domain, so I'm left with, Netbios cache or something (I am skeptical that this was a leftover from a switch/router table).  Any theories?

Not true. You _don't_ need any special WINS server or domain to have Netbios cache somewhere. *Every* Windows machine participate in 'choose local browser' process.
That's are related links:
http://www.linux-mag.com/id/785 (Understanding The Network Neighborhood, registration required)
http://www.microsoft.com/technet/archive/winntas/plan/capacityplanning/a06_brw.mspx?mfr=true
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ksuchyAuthor Commented:
I'm going to give you all the points.  You have some good ideas, although I have found several other possibilities.  Thanks again!
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NopiusCommented:
Thank you for points, ksuchy.
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