Replace UTM 220 with 115

Question

Hello. I have UTM 220 and I have at most 79 hosts connected through this firewall I'm going to trade this UTM 220 for a 115. 
 
 My question: Does UTM 115 support how many simultaneous connections?

kerobra_retired · Accepted Answer

Sorry, but I wouldn't even recommend this exchange if only a basic license with firewall is active. That models are typically for small businesses (meaning 5-10 employes). 
 Concurrent connections is not a value that can be used to correctly choose the right size for a SG or XG appliance. Sophos has a sizing guideline (unfortunately still based on 9.2, but at least...) - to answer your question 1.000.000 concurrent connections, the 220 had 300.000. But that definitely doesn't mean it can handle 3 times the users/devices the 220 could! 
 I would recommend to ask a Sophos partner or distributor for help with a renew (as there are several price discounts if you upgrade an old appliance to a newer one).It mostly depends on how many users use how many modules how often a day, which appliance you should choose, that isn't even a simple user/enpoint count. 
 Here is the old UTM sizing guide: https://www.sophos.com/en-us/medialibrary/PDFs/factsheets/Sophos_UTM_9_sgna.pdf And the newer one for the SG series: http://www.virtualsecurity.nl/download/datasheet/sg-series-sizing%20-guide.pdf 
 The main change between the two guides is the weighting for counting "UTM users" as you can't simply take your number of endusers. Depending on which modules are active with 75 users I would - if you were my customer and e.g web filtering is used - recommend you at least a SG that handles around 100 "UTM users". With very active internet activities even a 210 could be too small, a 115 for sure is.

BAlfson · Answer

Hi, Joao Paulo, and welcome to the UTM Community! 
 Kevin's right about everything he says. A word of caution about trying to size your own UTM/SG. Those guides require some experience and training to use effectively. As Kevin says, ask Sophos for names of good resellers in your area. 
 Cheers - Bob