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Port 36412 (s1-control)

IANA assigns port 36412 to s1-control: S1-Control Plane (3GPP).

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference
s1-control SCTP S1-Control Plane (3GPP) Kimmo Kymalainen -

Registry dates for this port: registered 2009-09-01.

Check what is listening on port 36412

Linux: is anything listening on TCP 36412?
sudo ss -tlnp 'sport = :36412'
Linux / macOS: which process owns the port
sudo lsof -nP -i :36412
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':36412 '
Windows (Command Prompt)
netstat -ano | findstr :36412
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 36412 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 36412
From Windows
Test-NetConnection HOST -Port 36412

Block port 36412 in the firewall

ufw
sudo ufw deny 36412/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 36412 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 36412 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 36412' -Direction Inbound -Protocol TCP -LocalPort 36412 -Action Block

Related ports

36001allpeers36411wlcp36422x2-control36423slmap

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