- Restrict management and monitoring protocols to the monitoring network.
- Replace community strings and default credentials.
- Send logs over TLS.
Port 3300: Ceph monitor
Port 3300 is assigned by IANA to ceph (Ceph monitor).
3300
How ceph works
Monitoring & loggingThe monitoring server collects metrics, alerts or logs from devices over port 3300.
- Transport
- TCP
- Exposure risk
- not rated depends on the program listening
- Encryption
- Unknownnot stated by the registry
- IANA status
- Assigned1 registered service
- Range
- Registered (1024-49151)
- Category
- Monitoring & logging
Is port 3300 dangerous?
We have no specific security note for port 3300. Its risk depends on the program actually listening on it. General advice for monitoring & logging services:
IANA registry entries for port 3300
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| ceph | 3300 | TCP | Ceph monitor Reported: Known Unauthorized Use on port 3300 | - | 2015-06-29 |
| - | 3300 | - | Reserved | - | - |
// source: IANA service name and port number registry
Which program uses port 3300, and is it reachable?
Linux
sudo ss -ltnup 'sport = :3300' # process listening on 3300
sudo lsof -nP -i :3300macOS
sudo lsof -nP -i :3300
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3300 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 3300 netstat -ano | findstr :3300
From another machine
nmap -p 3300 -sV <host> nc -zv <host> 3300
Block it in the firewall
sudo ufw deny 3300/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 3300" -Direction Inbound -LocalPort 3300 -Protocol TCP -Action Block # Windows
What is port 3300 used for?
Port 3300 is assigned by IANA to ceph (Ceph monitor).
Is port 3300 TCP or UDP?
Port 3300 is registered for TCP.
Is it safe to open port 3300?
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. Restrict management and monitoring protocols to the monitoring network.
How do I check if port 3300 is open?
On Linux run "ss -ltnup 'sport = :3300'", on macOS "lsof -nP -i :3300", and on Windows "netstat -ano | findstr :3300" to see the local process. From another machine, "nmap -p 3300 <host>" shows whether it is reachable.
Other monitoring & logging ports
:161 SNMP udp · tcp · high risk :162 SNMP trap udp · tcp · moderate risk :9090 Prometheus / admin consoles tcp · udp · high risk :514 Syslog udp · tcp · moderate risk :6514 Syslog over TLS tcp · udp · dccp · low risk :5601 Kibana tcp · udp · high risk :391 SynOptics SNMP Relay Port tcp · udp :412 Trap Convention Port tcp · udp