HP VPN Firewall Appliances Access Control Configuration Guide

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• When session acceleration and active/standby failover are configured at the same time, session
acceleration does not take effect, but will degrade the system performance.
• If session acceleration is enabled, the system cannot perform abnormity detection for non-SYN
initial TCP packets.
• If session acceleration is enabled, the statistics of half-open and half-close sessions are not correct,
and SYN Flood attack detection cannot be performed according to half-open and half-close session
threshold.
• If session acceleration is enabled, the statistics of protected IP addresses by a bidirectional TCP
proxy are not correct.
• If session acceleration is enabled and you want to limit the number of connections, use the CLI to
configure the limit.