← Port Encyclopedia
638

Port-638

TCP
System Low Risk
Reserved or unassigned port 638 — may appear in network scans as open, closed, or filtered

🔍 How to Scan Port 638

nmap -sV -p 638 target
nmap -sV -sC --script=banner -p 638 target
nc -zv target 638

🛡️ Security Considerations

  • Scan port 638 with nmap -sV to identify the exact service and version
  • If Port-638 is not needed, close or firewall this port immediately
  • Check for default credentials if a management interface runs on this port
  • Use searchsploit port-638 to find known exploits
  • Monitor traffic on port 638 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 633
Port-633
Port 634
Port-634
Port 635
Port-635
Port 636
LDAPS
Port 637
Port-637
Port 639
Port-639
Port 640
Port-640
Port 641
Port-641
Port 642
Port-642
Port 643
Port-643
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