Although shipments increased by four percent year on year, representing 183,885 units the revenues decreased by 0.2 percent.
In the category, so-called unified threat management (ITM) appliances increased in value and over the next five years will be the largest product category, with a 62 percent share by 2019.
The top vendors in the sector in the second calendar quarter were Check Point (19.2%), Cisco (16.8%) and Fortinet (11.5%).
The European market is mostly driven by the UK and German, IDC said, with 45 percent of the entire Western European market.
Other players in the security appliance market were Palo Alto (6.5%), Juniper (41.6%) and “thers” – with largely a hefty 41.6 percent. But the “other” market share declined by 6.3 percent compared to the same quarter in 2015.