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Port 5427 (sco-peer-tta)

IANA assigns port 5427 to sco-peer-tta: SCO-PEER-TTA.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
sco-peer-tta TCP SCO-PEER-TTA Andrew Shire -
sco-peer-tta UDP SCO-PEER-TTA Andrew Shire -

Check what is listening on port 5427

Linux: is anything listening on TCP 5427?
sudo ss -tlnp 'sport = :5427'
Linux: UDP 5427
sudo ss -ulnp 'sport = :5427'
Linux / macOS: which process owns the port
sudo lsof -nP -i :5427
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':5427 '
Windows (Command Prompt)
netstat -ano | findstr :5427
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 5427 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 5427
From Windows
Test-NetConnection HOST -Port 5427
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 5427

Block port 5427 in the firewall

ufw
sudo ufw deny 5427/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 5427 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 5427 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 5427' -Direction Inbound -Protocol TCP -LocalPort 5427 -Action Block
ufw
sudo ufw deny 5427/udp
iptables
sudo iptables -A INPUT -p udp --dport 5427 -j DROP
nftables
sudo nft add rule inet filter input udp dport 5427 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 5427' -Direction Inbound -Protocol UDP -LocalPort 5427 -Action Block

Related ports

5425br-channel5426devbasic5428telaconsole5429base

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