This counter counts TCP segments sent by this virtual router that carry the RST flag, meaning connections it has actively reset. A rising count can indicate the virtual router is rejecting connection attempts to closed ports or terminating sessions abnormally, which an admin would want to correlate with application or security events. For example, a burst in csOrionVPNVRouterTcpOutRsts following a port scan against the virtual router's management interface shows the stack correctly resetting each unsolicited connection attempt.