New answers tagged network-monitoring
I answered this question on StackOverflow but the short answer is that it's a heartbeat Nmap uses to monitor network congestion.
This question is three years old but I feel it should be answered: they aren't open in the default installation; at least, not anymore. A port scan on a base installation of OpenBSD 5.5 only shows ssh: Port Scan has started… Port Scanning host: 192.168.1.29 Open TCP Port: 22 ssh Port Scan has completed… Enabling httpd and disabling pf ...
Check out the ss utility. ss -an
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