[AG-TECH] more certificate issues

[Christoph Willing]

On 22/08/2005, at 9:07 AM, Richard Caladine wrote:

> Dear All,
>
> I am still having problems obtaining a certificate and am starting to 
> think laterally about where the problem may be.
> Could it be that the proxy server and/or the border firewall at my 
> institution are blocking the communication?

Yes it could. A quick test of this is to run an ordinary browser and 
try reaching some well known web sites e.g.
	www.uow.edu.au
	www.usyd.edu.au
	www.ap-accessgrid.org
	www.accessgrid.org
If you're asked for a password to browse beyond uow.edu.au, then it 
looks very much like a proxy issue.


A second possibility is the MTU. Are you using Linux? If so, then I've 
recently found that changing the MTU from 1500 to 1476 cured a problem 
that looked a bit like a proxy and/or firewall problem. In that case, 
the browser would reach www.usyd.edu.au, but could not reach 
www.ap-accessgrid.org (which is "nearby").


> What protocol does the certificate wizard use to communicate the 
> request to the AG developers?

I believe its https (hence simple browser tests, as above, can give 
some help in this case).


chris


Christoph Willing                        Ph: +61 7 3365 8350
QPSF Access Grid Manager
University of Queensland