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Port 3313 (uorb)

IANA assigns port 3313 to uorb: Unify Object Broker.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
uorb TCP Unify Object Broker Daegis Inc -
uorb UDP Unify Object Broker Daegis Inc -

Registry dates for this port: last modified 2012-07-31.

Check what is listening on port 3313

Linux: is anything listening on TCP 3313?
sudo ss -tlnp 'sport = :3313'
Linux: UDP 3313
sudo ss -ulnp 'sport = :3313'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3313
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3313 '
Windows (Command Prompt)
netstat -ano | findstr :3313
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3313 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3313
From Windows
Test-NetConnection HOST -Port 3313
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3313

Block port 3313 in the firewall

ufw
sudo ufw deny 3313/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3313 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3313 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3313' -Direction Inbound -Protocol TCP -LocalPort 3313 -Action Block
ufw
sudo ufw deny 3313/udp
iptables
sudo iptables -A INPUT -p udp --dport 3313 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3313 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3313' -Direction Inbound -Protocol UDP -LocalPort 3313 -Action Block

Related ports

3311mcns-tel-ret3312appman-server3314uohost3315cdid

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