WWe have 2 SG550 (9.707-5) which recently have problems with the web proxy. Currently, web surfing is no longer possible when the web proxy is enabled. For the users (~600), the browser then only spins in the blank, the searched website is not displayed…

We currently have 2 UTM525 security appliances configured in a Master/slave relationship and have purchased 2 SG550 security appliances to replace our UTM525's. Does anyone know what steps need to be taken to upgrade to the SG550 without any network downtime…