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Port 5056 (intecom-ps1)

IANA assigns port 5056 to intecom-ps1: Intecom Pointspan 1.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
intecom-ps1 TCP Intecom Pointspan 1 David Meermans -
intecom-ps1 UDP Intecom Pointspan 1 David Meermans -

Check what is listening on port 5056

Linux: is anything listening on TCP 5056?
sudo ss -tlnp 'sport = :5056'
Linux: UDP 5056
sudo ss -ulnp 'sport = :5056'
Linux / macOS: which process owns the port
sudo lsof -nP -i :5056
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':5056 '
Windows (Command Prompt)
netstat -ano | findstr :5056
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 5056 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 5056
From Windows
Test-NetConnection HOST -Port 5056
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 5056

Block port 5056 in the firewall

ufw
sudo ufw deny 5056/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 5056 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 5056 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 5056' -Direction Inbound -Protocol TCP -LocalPort 5056 -Action Block
ufw
sudo ufw deny 5056/udp
iptables
sudo iptables -A INPUT -p udp --dport 5056 -j DROP
nftables
sudo nft add rule inet filter input udp dport 5056 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 5056' -Direction Inbound -Protocol UDP -LocalPort 5056 -Action Block

Related ports

5054rlm-admin5055unot5057intecom-ps25058locus-disc

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