Cannot establish NTLM Authentication channel

Lots of posts about this. Here is an example. AD SSO - Cannot establish NTLM authentication channel with xxx Seems like the recommendation is to disable AD SSO in all zones. But what if we want SSO...
Ipsec VPN couldn't established.

Hi, I have configured the tunnel from DC to another location, The tunnel couldn't established. I don't know what is the reason the tunnel has down. I have debug the issue still unable to find out the...
v21 EAP: Can't establish HA - Interface Port "Source: Port1"

I cannot establish HA between two brand new XGS136 SFOS 21 Error: Can't establish HA. Both devices must use the same HA passphrase and dedicated HA link IP addresses that belong to the same network....
IPSEC connection showing this error Couldn't authenticate the local gateway. Check the authentication settings on both devices.

We are trying to setup a IPSEC tunnel between a Sophos Firewall and a ISR4300 After activating its showing error Couldn't authenticate the local gateway. Check the authentication settings on both devices...
Cannot connect to XG135

Hi, I recently acquired a used XG135. When I got it, I plug an ethernet cable on Port1 and the light was on and told myself that all was ok then. So I decided to make a reset factory, and since then...