KB-0043High Priority
Resolving the SUGMA VPN Error
Affects: Remote workers · VPN Client v3.1+ · Last reviewed: 10 Sep 2026
View VPN Fix
Click to reveal the official resolution for the SUGMA VPN error.
Overview
The SUGMA error (code 0x4C2D) occurs when the VPN client fails to complete the authentication handshake with the CorpIT security gateway. This typically happens after a security certificate update.
When does this occur?
Immediately after updating the VPN client to v3.1
When connecting from a new or unrecognised network
After a password reset has been performed
When the security certificate cache is corrupted
Resolution
IT has identified that the SUGMA error is caused by a mismatch between the local certificate store and the gateway's updated root certificate. To resolve this, users must clear the SUGMA certificate cache and re-authenticate.
Step-by-Step Fix
Follow the complete resolution procedure to restore VPN access.
Reveal solution