[Opensim-users] NAT & Corporate Firewall

[Fleep Tuque]

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
Result On-Campus: SUCCESS Result Off-Campus: FAIL

Test 4: InternalAddress = ucsim1.irc.uc.edu ExternalHostName =
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

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> 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).
>
> 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 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> 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 (the box
> running
> > opensim.exe).
>
> --
> Edmund Edgar
> Founder, KK Social Minds
> Educational Technology for the Web and Virtual Worlds
>
> ed at socialminds.jp
> +81 090 3912 3380
> Skype: edmundedgar
> Second Life: Edmund Earp
> Linked In: edmundedgar
> Twitter: @edmundedgar
> http://www.socialminds.jp
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