Hi Guys,
Since I activated STAS on Sophos Firewall, sometimes for a small period of time, workgroup users that are using the captive portal, cannot login to the captive portal. In fact at this period, not only the captive portal but user portal, web admin, VPN is not working. Even local users cannot login. It looks like the authentication service halts for a minute. Here is the error clients are receiving at the same time. I looked at access_server.log / csc.log / applog.log and found nothing related.
I've searched the Sophos Community and found this topic with the same issue:
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