[Opensim-users] NAT & Corporate Firewall

[Diva Canto]

Try the missing combination
InternalAddress=0.0.0.0 ExternalHostName=ucsim1.irc.uc.edu 
<http://ucsim1.irc.uc.edu>

On 3/30/2011 8:11 AM, Fleep Tuque wrote:
> Hi Edmund,
>
> Nod I've tried that permutation too, no luck.  Here are the 
> combinations I've tried so far:
>
> Test 1:  InternalAddress = 10.23.23.x  ExternalHostName = 129.137.2.x
> Result On-Campus: FAIL Result Off-Campus: FAIL
>
> Test 2: InternalAddress = 0.0.0.0 ExternalHostName = 129.137.2.x
> Result On-Campus: FAIL Result Off-Campus: FAIL
>
> Test 3: InternalAddress = 10.23.23.x ExternalHostName = 
> ucsim1.irc.uc.edu <http://ucsim1.irc.uc.edu>
> Result On-Campus: SUCCESS Result Off-Campus: FAIL
>
> Test 4: InternalAddress = ucsim1.irc.uc.edu <http://ucsim1.irc.uc.edu> 
> ExternalHostName = ucsim1.irc.uc.edu <http://ucsim1.irc.uc.edu>
> Result: Opensim.exe crashes
>
> Leaving at the default InternalAddress = 0.0.0.0 and ExternalHostName 
> = SYSTEMIP works for on campus users but not for off campus users.
>
> Has anyone else run into this problem with a campus or corporate 
> firewall?  How did you resolve it?
>
> Thanks again,
>
> - Chris
>
>
> Chris M. Collins (SL: Fleep Tuque)
> Project Manager, UC Second Life
> Second Life Ambassador, Ohio Learning Network
> UCit Instructional & Research Computing
> University of Cincinnati
> 406E Zimmer Hall
> PO Box 210088
> Cincinnati, OH 45221-0088
> (513)556-3018
> chris.collins at uc.edu <mailto:chris.collins at uc.edu>
>
> UC Second Life: http://homepages.uc.edu/secondlife
> OLN Second Life: http://www.oln.org/emerging_technologies/emtech.php
>
>
>
>
> On Wed, Mar 30, 2011 at 11:03 AM, Edmund Edgar <lists at edochan.com 
> <mailto:lists at edochan.com>> wrote:
>
>     Hi Fleep.
>
>     Maybe you've already tried this, but I'd suggest setting
>     ExternalHostName as your external IP (129.137.2.x) rather than your
>     hostname (ucsim1.irc.uc.edu <http://ucsim1.irc.uc.edu>).
>
>     Behind NAT, some places (including Amazon EC2, I found) use an (IMHO
>     evil) thing called Split DNS (or "Split Brain DNS"), where the IP
>     address you get inside the firewall is different to the one you get
>     outside your firewall. This may be causing your OpenSim box to think
>     that ucsim1.irc.uc.edu <http://ucsim1.irc.uc.edu> is 10.23.23.x
>     rather than 129.137.2.x.
>
>     HTH, let us know how you get on.
>
>     On 30 March 2011 23:44, Fleep Tuque <fleep513 at gmail.com
>     <mailto:fleep513 at gmail.com>> wrote:
>     > the client
>     > correctly uses the external IP to communicate with the robust
>     server, but
>     > after the authentication process, I see the client trying to
>     send packets to
>     > the simulator machine's internal IP (10.23.23.x) instead of an
>     external IP
>     > address (129.137.2.x).
>     > [snip]
>     > In the region.ini file I've tried
>     > various permutations of the InternalAddress and ExternalHostName
>     variables,
>     > currently InternalAddress is set to the internal IP 10.23.23.x
>     and the
>     > ExternalHostName is set to the hostname ucsim1.irc.uc.edu
>     <http://ucsim1.irc.uc.edu> (the box running
>     > opensim.exe).
>
>     --
>     Edmund Edgar
>     Founder, KK Social Minds
>     Educational Technology for the Web and Virtual Worlds
>
>     ed at socialminds.jp <mailto:ed at socialminds.jp>
>     +81 090 3912 3380 <tel:%2B81%20090%203912%203380>
>     Skype: edmundedgar
>     Second Life: Edmund Earp
>     Linked In: edmundedgar
>     Twitter: @edmundedgar
>     http://www.socialminds.jp
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>
>
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