No worries, I figured it out myself, so Im posting here to anyone in
the future for reference:

We need to open BOTH ports 80 and 443 to:

www.google.com
picasaweb.google.com

Hope that helps someone. It took me a while to figure this out.

On May 3, 1:45 pm, Ajith <cyberaj...@gmail.com> wrote:
> Hi,
>
> This is Ajith from India. We are developing an application where we
> import Picasa images for displaying in our system. This works fine in
> our dev server as well as a couple of partner production servers where
> we have installed this. Now we need to install this on a new partners
> server in Germany. The problem is that their server has very strict
> firewall rules where all outgoing traffic is blocked, so we need to
> tell them what ports/urls to open to make Picasa Import work.
>
> So we told them the following:
> - opened picasaweb.google.com (port 80) for outgoing communication
>
> It did not work so then we did this:
> - opened port 443 for outgoing communication
>
> That did not work too. I believe we need to openwww.google.comon 443
> for the authentication.
>
> However my problem is that I am unsure if openingwww.google.comon
> 443 is all that is required and if more urls/ports need to be opened.
> The thing is that I have already requested them a couple of times to
> open urls/ports to make this work. I don't want to make another
> request that does not solve the problem because it would look like
> trial and error...(which it is btw, but you know how these partner
> company/technical business is..)
>
> I am not very familiar with the Picasa/GData API so I thought I would
> post here and get your opinion on if any other URLs than the following
> are required:
>
> - Open communication on 80 and 443 on both picasaweb.google.com 
> andwww.google.com
>
> On a side note, I briefly looked at the Picasa/GData code and saw a
> bunch of 'namespace urls' If i change/comment any of them, then my
> application does not work on my dev box. Does these mean that these
> urls are also necessary and communication should be opened to them as
> well?
>
> As you folks can see, I am a bit lost here...any help is very much
> appreciated!
>
> Ajith
>
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