Port 10050 (Zabbix agent)

Zabbix server and proxies poll agents on 10050.

Registered (user) port, 1024-49151 TCP Monitoring and logging Do not expose to the internet

What port 10050 is used for

Zabbix server and proxies poll agents on 10050.

Security: should port 10050 be open?

Do not expose to the internet. Allow only your Zabbix server (Server= in the agent config) and keep EnableRemoteCommands off, or it runs commands for whoever can reach it.

IANA assignment

Service nameProtoDescriptionAssigneeReference

zabbix-agent TCP Zabbix Agent Alexei Vladishev -

zabbix-agent UDP Zabbix Agent Alexei Vladishev -

Registry dates for this port: registered 2006-02.

Check what is listening on port 10050

Linux: is anything listening on TCP 10050?

sudo ss -tlnp 'sport = :10050'

Linux / macOS: which process owns the port

sudo lsof -nP -i :10050

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':10050 '

Windows (Command Prompt)

netstat -ano | findstr :10050

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 10050 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine

nc -vz -w 5 HOST 10050

From Windows

Test-NetConnection HOST -Port 10050

Block port 10050 in the firewall

ufw

sudo ufw deny 10050/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 10050 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 10050 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 10050' -Direction Inbound -Protocol TCP -LocalPort 10050 -Action Block

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Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.