I have a really sophisticated two site network which supports load balanced web servers, DNS servers and streaming media. We have voip phones and loads of other services. A real genius built the original system with Cisco ASA 5520 devices at two sites running site to site VPN and others. They continue to behave perfectly, but I am concerned that they don't provide new gen security.
I have purchased Dell SonicWall NSA 3600 devices but am not having a good time getting them installed. Not a good experience with SonicWall professional services! Should I stick with the pain and make them work or give up and choose an upgraded to the Cisco ASA 5525-X or something else instead? What is the best technical solution?
Many thanks in advance