![]() Introductionįrom one day to the next, network performance deteriorated. It provides over 70 different categories, and we found it extremely efficient.Are you experiencing performance problems with your Zyxel ZyWALL USG firewall? You will find in this blog an example of a real case I faced and how I solved it. Web filtering is provided by Blue Coat’s Cloud Service, and uses filter policies applied to objects such as systems, subnets and users. For Windows Live Messenger we could stop users logging in or block them from using video, chat and file transfer while for BitTorrent and FTP we could allow access but apply bandwidth restrictions. ZyXEL’s application control can manage a wide range including IM, P2P and VoIP. Using five DNSBL servers, including Spamhaus and Spamcop, we tested with live mail over a two week period and saw it stop less than 5% of spam. During the tests, appliance CPU usage was seen to settle at 98%, showing that ten clients is a realistic limit.Īnti-spam is included as standard, but don’t get excited: all you can do is create black and white lists for message subject keywords, and apply up to five DNSBL servers. Using IxLoad to simulate ten web clients, we recorded a throughput of 131Mbits/sec with the firewall enabled and 30Mbits/sec with AV and IDP also active. For performance testing, we used the lab’s Ixia Optixia XM2 chassis equipped with two Xcellon-Ultra NP blades.
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