- Bind the service to localhost or a private network, never to a public address.
- Enable authentication, use per-application accounts and require TLS.
- Watch for exposed Docker ports: publish them on 127.0.0.1 only.
Port 9093: Copycat database replication service
Port 9093 is assigned by IANA to copycat (Copycat database replication service).
9093
How copycat works
Databases & cachesThe application sends a SQL query to the copycat server on port 9093, which returns rows from its tables.
- 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
- Databases & caches
Is port 9093 dangerous?
We have no specific security note for port 9093. Its risk depends on the program actually listening on it. General advice for databases & caches services:
IANA registry entries for port 9093
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| copycat | 9093 | TCP | Copycat database replication service | - | 2012-03-15 |
| - | 9093 | - | Reserved | - | - |
// source: IANA service name and port number registry
Which program uses port 9093, and is it reachable?
Linux
sudo ss -ltnup 'sport = :9093' # process listening on 9093
sudo lsof -nP -i :9093macOS
sudo lsof -nP -i :9093
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 9093 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 9093 netstat -ano | findstr :9093
From another machine
nmap -p 9093 -sV <host> nc -zv <host> 9093
Block it in the firewall
sudo ufw deny 9093/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 9093" -Direction Inbound -LocalPort 9093 -Protocol TCP -Action Block # Windows
What is port 9093 used for?
Port 9093 is assigned by IANA to copycat (Copycat database replication service).
Is port 9093 TCP or UDP?
Port 9093 is registered for TCP.
Is it safe to open port 9093?
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. Bind the service to localhost or a private network, never to a public address.
How do I check if port 9093 is open?
On Linux run "ss -ltnup 'sport = :9093'", on macOS "lsof -nP -i :9093", and on Windows "netstat -ano | findstr :9093" to see the local process. From another machine, "nmap -p 9093 <host>" shows whether it is reachable.
Other databases & caches ports
:3306 MySQL / MariaDB tcp · udp · high risk :1433 Microsoft SQL Server tcp · udp · high risk :5432 PostgreSQL tcp · udp · high risk :6379 Redis tcp · critical risk :27017 MongoDB tcp · critical risk :9200 Elasticsearch tcp · udp · critical risk :1521 Oracle Database tcp · udp · high risk :11211 Memcached tcp · udp · high risk