Why nmap a shows port open for sctp when it is closed in Iptables ?
Issue
- Iptables allows SCTP packets despite the rules blocking them.
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Firewall should block sctp port which is not enabled in the firewall.
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Why nmap shows port open for sctp when it is closed in Iptables, When used with " ESTABLISHED" state parameter ?
PORT STATE SERVICE REASON
3868/sctp closed diameter abort
9000/sctp open unknown init-ack
Environment
- Red Hat Enterprise Linux 6.5
- Red Hat Enterprise Linux 7
- nmap-6.46-1
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