NEW Problems with Update / WSUS / SUP

[ROLS733]

Hello all,

got a Problem, and i dont know whats causing it, is it the Proxy Server, SCCM, SUP or something else.....
But now from the beginning. Last Weekend i discovered that some Servers and some Clients dont get updates thrugh the Clientmanager. If i go to Windows Updates klick on "check for Updates"
this comes up:

In english; we couldnt esatblish a connection with the Updateservice.
But that shoulb be still possible with SUP or am i wrong?

If i got a Answer on this, i will continue with the next discoverys and questions.
Thank you all

 

[Edy]

Frist of all, establish that the client can reach the SUP and try telnet over port 8005 (this is the default port).

 

[ROLS733]

it can´t.
But what i didnt mentioned by now, the most server and clients get the updates by the sup.
Its only my and a few other PC´s and four servers that cant get them.
The telnet connection wont work on either of them.

We played a little bit with DNS and and Reverse DNS in our Sophos UTM, now the Error changed:

 

[ROLS733]

OK think i found the Problem.
"netsh winhttp show proxy" shows me a other result, that it should be. local should be a exception.
"netsh winhttp import proxy source =ie" imports the right config with local exception, and it works.