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Port 9089 (sqlexec-ssl)

IANA assigns port 9089 to sqlexec-ssl: IBM Informix SQL Interface - Encrypted.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
sqlexec-ssl TCP IBM Informix SQL Interface - Encrypted Jonathan Leffler -
sqlexec-ssl UDP IBM Informix SQL Interface - Encrypted Jonathan Leffler -

Registry dates for this port: registered 2005-12.

Check what is listening on port 9089

Linux: is anything listening on TCP 9089?
sudo ss -tlnp 'sport = :9089'
Linux: UDP 9089
sudo ss -ulnp 'sport = :9089'
Linux / macOS: which process owns the port
sudo lsof -nP -i :9089
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':9089 '
Windows (Command Prompt)
netstat -ano | findstr :9089
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 9089 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 9089
From Windows
Test-NetConnection HOST -Port 9089
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 9089

Block port 9089 in the firewall

ufw
sudo ufw deny 9089/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 9089 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 9089 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 9089' -Direction Inbound -Protocol TCP -LocalPort 9089 -Action Block
ufw
sudo ufw deny 9089/udp
iptables
sudo iptables -A INPUT -p udp --dport 9089 -j DROP
nftables
sudo nft add rule inet filter input udp dport 9089 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 9089' -Direction Inbound -Protocol UDP -LocalPort 9089 -Action Block

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9087classic9088sqlexec9090Prometheus9091Prometheus Pushgateway / Transmission

All port numbers · Open port checker
Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.