SFOS 20.0.0 GA-Build222 DHCP ISSUES

Question

Hello evryone. 
 
 after updating Sophos firewall to SFOS 20.0.0 GA-Build222 the DHCP stop relaing ip adress in all network devisies, i try to desabel./enabled DHCP, reload firewall no result. 
 i was oblige to downgrade to SFOS 19.5.3 MR-3-Build652 and every thing goes On. 
 
 someone had this probleme ?

Vishal_R · Accepted Answer

Hi Velislav Valkov Thank you for sharing this snapshot that has given me more clarity on your reported situation. In your existing V19.5.X firmware version I can see more than 1 DHCP server defined/configured over the same (physical/logical) interface. In such a scenario it has been observed DHCP stopped leasing IP after the Upgrade to V20 for the subsequent DHCP servers (shared network in the DHCP conf file) over that interface. This has been marked as in BUG and the fixed version is marked V20.1. MR-1. NC-129171 - DHCP stopped working after the upgrade from v19.5.3 to v20 GA I would suggest logging a support case to review your logs and details with the above ID and to confirm the workaround.

Vivek Jagad · Answer

Hello haykel BEN SALAH ,

Thank you for reaching out to the community, for the detailed diagnosis, request you to log a service request and plan a upgrade with support so that they can diagnose the issue live and try to provide you a fix/solution if the issue persist.

Vishal_R · Answer

Hi haykel BEN SALAH Here is the information along with KBA documentation for your reported situation:

Sophos Firewall: Upgrade to SFOS 20.0 GA is blocked for specific legacy DHCP server configuration
https://support.sophos.com/support/s/article/KB-000045837?language=en_US

Fix for this issue is targeted with ID NC-128820 under SFOS 20.0 MR1 and temporary workaround mentioned in same KBA for such setup.

Proactively upgrade to SFOS 20.0 GA has been prevented for such setups with alert on Control Center.

SFOS 20.0.0 GA-Build222 DHCP ISSUES

Top Replies