← Port Encyclopedia
990

Port-990

TCP
System Low Risk
Reserved or unassigned port 990 — may appear in network scans as open, closed, or filtered

🔍 How to Scan Port 990

nmap -sV -p 990 target
nmap -sV -sC --script=banner -p 990 target
nc -zv target 990

🛡️ Security Considerations

  • Scan port 990 with nmap -sV to identify the exact service and version
  • If Port-990 is not needed, close or firewall this port immediately
  • Check for default credentials if a management interface runs on this port
  • Use searchsploit port-990 to find known exploits
  • Monitor traffic on port 990 with Wireshark or tcpdump for anomalies
  • Ensure the service is patched to the latest version to prevent known CVE exploitation

🔗 Related System Ports

Port 1
TCPMUX
Port 5
RJE
Port 7
Echo
Port 9
Discard
Port 11
systat
Port 13
Daytime
Port 17
QOTD
Port 19
Chargen
Port 37
Time
Port 79
Finger
Port 111
RPCbind
Port 113
Ident

📍 Nearby Ports

Port 985
Port-985
Port 986
Port-986
Port 987
Port-987
Port 988
Port-988
Port 989
Port-989
Port 991
Port-991
Port 992
Port-992
Port 993
IMAPS
Port 994
Port-994
Port 995
POP3S
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