Port 36423 (slmap)

IANA assigns port 36423 to slmap: SLm Interface Application Protocol.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference

slmap SCTP SLm Interface Application Protocol 3GPP 4 -

Registry dates for this port: registered 2015-06-18.

Linux: is anything listening on TCP 36423?

sudo ss -tlnp 'sport = :36423'

Linux / macOS: which process owns the port

sudo lsof -nP -i :36423

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':36423 '

Windows (Command Prompt)

netstat -ano | findstr :36423

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 36423 -State Listen | Select LocalAddress,OwningProcess

From another machine

nc -vz -w 5 HOST 36423

From Windows

Test-NetConnection HOST -Port 36423

ufw

sudo ufw deny 36423/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 36423 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 36423 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 36423' -Direction Inbound -Protocol TCP -LocalPort 36423 -Action Block

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