Watchguard XTM 2 Series, XTM 5 Series, XTM 8 Series – Fireware XTM OS 11.4.2 – CSP1
11.4.2 – CSP1 Resolves the following issues:
BUG61760: Authentication failing or slow with hundreds of Firebox DB authentication at same time
BUG62019: BOVPN tunnels would not establish after upgrade from 11.3.2 to 11.4.1 using IPSec Certificates
BUG61916: XTM1050 xt_session module fails to add session due to limit of 1000
BUG61009: 1-to-1 NAT with SIP-ALG not working properly
BUG59407, BUG62074: resolved several issues causing certificates to not sync properly when using FireCluster Active/Passive. Improper syncing resulted in missing certificates
BUG62352: iOS PPTP connection may fail when connected from a 3G line
You can request 11.4.2 – CSP1 from Watchguard Support by logging a support case online, they should then be able to provide an ftp download link and appropriate credentials.
Please note that Watchguard CSP releases are cumulative so you should only need to apply the latest to ensure that you also have any previous fixes.