All of our offices using AT&T/SBCGLOBAL are unable to Join the Windows 2003 Domain back at our data center. However, our offices that are on SureWest and ComCast have no issue when joining domain...
Here is our basic configuration how the WatchGuard X10e-w Firebox establishes the vpn:
(a) Client PCs
(b) --> unmanged Switch (Linksys)
in transparent/pass-through mode to lan1 of WatchGuard Firebox
(c) --> Firebox establishes the vpn
Any to Any policy (wide open), for now...
(d) --> Sends data out through Netopia ADSL
(e) --> then on to the AT&T SBCGLOBAL equipment platform
Same configuration at offices with SureWest or ComCast work just fine.
Other notes:
1. AT&T SBCGLOBAL is using PPoE
2. Internet connectivity is fine, works okay!
3. DNS is fine, WE CAN PING by Name or IP on ALL tunnels, even over the AT&T SBCGLOBAL network
PROBLEM: We simply cannot join the Windows 2003 Domain at the Data Center (over AT&T). We can over SureWest & ComCast.
By the way AT&T are NO HELP AT ALL. Their response is, "We support VPN, everything is okay on our end, check your equipment. Have a nice day..."
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