Virtualization redirect upon network loss

[heiho1]

Hello,

I have been taking a look at the 2.0 release of the web content management functionality.  I am very impressed by the solution taken to handle virtualization.  I would like to learn more about how the virtualization works.  In particular, I noticed that if I disconnect my network and try to load a virtual page of the form

http://alfresconps.www--sandbox.127-0-0-1.ip.alfrescodemo.net:8180/

the page still loads and taking a look at the HTTP traffic, it's not apparent to me how the hostname is being resolved.  I took a look at the ports which are active while the servers are up and I noticed that there are some interesting ports opened such as

2884 - flashmsg
2892 - snifferdata
2890 - cspclmulti
3000 - hbci
3004 - csoftragent
3002 - exlm-agent
3005 - geniuslm
3006 - ii-admin
2894 - abacus-remote

I was wondering if there is a white paper or any other technical documentation on how the virtualization is being accomplished.

Thanks,

James

[jcox]

James,

The virt server has nothing to do with those other open ports
on your box.   To verify that turn it off and re-run your port scan

The reason why your box can still resolve a name after you've
been disconnected from the internet is that your local machine
is caching the DNS lookups you did previously.  The time to live
(TTL) associated with name lookups performed by EchoDNS
on ip.alfrescodemo.net is 1 day.   Thus to see the lookup fail, reboot
your client machine to flush its cache (or if you don't want to do
that and can wait a day, the cached DNS record will expire on its own).

At that point, all lookups will fail when if you're both using EchoDNS
at ip.alfrescodemo.net and still disconnected from the Internet
(which is what you'd expect).  EchoDNS  is a special-purpose nameserver
I wrote to make installing  Alfresco's WCM package not require you to
modify your own DNS setup.

For much more information about the virtualization server:
http://wiki.alfresco.com/wiki/Virtualization_Server_FAQ

If you want a direct link to the section of the FAQ that talks about EchoDNS, see:
http://wiki.alfresco.com/wiki/Virtualization_Server_FAQ#What.27s_EchoDNS.3F

  Cheers,
  -Jon