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Port 3536 (snac)

IANA assigns port 3536 to snac: SNAC.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
snac TCP SNAC Tatsuya Igarashi -
snac UDP SNAC Tatsuya Igarashi -

Registry dates for this port: registered 2002-07.

Check what is listening on port 3536

Linux: is anything listening on TCP 3536?
sudo ss -tlnp 'sport = :3536'
Linux: UDP 3536
sudo ss -ulnp 'sport = :3536'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3536
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3536 '
Windows (Command Prompt)
netstat -ano | findstr :3536
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3536 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3536
From Windows
Test-NetConnection HOST -Port 3536
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3536

Block port 3536 in the firewall

ufw
sudo ufw deny 3536/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3536 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3536 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3536' -Direction Inbound -Protocol TCP -LocalPort 3536 -Action Block
ufw
sudo ufw deny 3536/udp
iptables
sudo iptables -A INPUT -p udp --dport 3536 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3536 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3536' -Direction Inbound -Protocol UDP -LocalPort 3536 -Action Block

Related ports

3534urld-port3535ms-la3537ni-visa-remote3538ibm-diradm

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