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// Directory & authentication

Port 6301: BMC CONTROL-D LDAP SERVER

Port 6301 is assigned by IANA to bmc_ctd_ldap (BMC CONTROL-D LDAP SERVER), bmc-ctd-ldap (BMC CONTROL-D LDAP SERVER IANA assigned this well-formed service name as a replacement for "bmc_ctd_ldap".).

6301

How bmc_ctd_ldap works

Directory & authentication
userdirectorybmc_ctd_ldapresponse userdirectorybmc_ctd_ldapresponse

The client proves who it is on port 6301 and gets an answer (or a ticket) it can use with other services.

Transport
TCP · UDP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned2 registered services
Range
Registered (1024-49151)
Category
Directory & authentication
01 Security

Is port 6301 dangerous?

We have no specific security note for port 6301. Its risk depends on the program actually listening on it. General advice for directory & authentication services:

  • Keep directory and authentication services on internal networks.
  • Require signing or TLS and disable anonymous queries.
  • Monitor authentication failures for spraying and brute force.
02 Registry

IANA registry entries for port 6301

ServicePortTransportDescriptionReferenceUpdated
bmc_ctd_ldap 6301 TCP, UDP BMC CONTROL-D LDAP SERVER - 2006-09
bmc-ctd-ldap 6301 TCP, UDP BMC CONTROL-D LDAP SERVER IANA assigned this well-formed service name as a replacement for "bmc_ctd_ldap". - 2006-09

// source: IANA service name and port number registry

03 Check it

Which program uses port 6301, and is it reachable?

Linux

sudo ss -ltnup 'sport = :6301'      # process listening on 6301
sudo lsof -nP -i :6301

macOS

sudo lsof -nP -i :6301

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 6301 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 6301
netstat -ano | findstr :6301

From another machine

nmap -p 6301 -sV <host>
sudo nmap -sU -p 6301 <host>
nc -zv <host> 6301

Block it in the firewall

sudo ufw deny 6301/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 6301" -Direction Inbound -LocalPort 6301 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 6301 used for?

Port 6301 is assigned by IANA to bmc_ctd_ldap (BMC CONTROL-D LDAP SERVER), bmc-ctd-ldap (BMC CONTROL-D LDAP SERVER IANA assigned this well-formed service name as a replacement for "bmc_ctd_ldap".).

Is port 6301 TCP or UDP?

Port 6301 is registered for TCP and UDP.

Is it safe to open port 6301?

It depends on the program that listens on it. Open it only for a service you know and only to the networks that need it. Keep directory and authentication services on internal networks.

How do I check if port 6301 is open?

On Linux run "ss -ltnup 'sport = :6301'", on macOS "lsof -nP -i :6301", and on Windows "netstat -ano | findstr :6301" to see the local process. From another machine, "nmap -p 6301 <host>" shows whether it is reachable.

05 Related
:389 LDAP tcp · udp · high risk :636 LDAPS tcp · udp · moderate risk :88 Kerberos tcp · udp · high risk :3268 Global Catalog (LDAP) tcp · udp · high risk :1812 RADIUS udp · tcp · moderate risk :31 MSG Authentication tcp · udp :49 Login Host Protocol (TACACS) tcp · udp :56 XNS Authentication tcp · udp

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