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Port 3087 (asoki-sma)

IANA assigns port 3087 to asoki-sma: Asoki SMA.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
asoki-sma TCP Asoki SMA Andrew Mossberg -
asoki-sma UDP Asoki SMA Andrew Mossberg -

Check what is listening on port 3087

Linux: is anything listening on TCP 3087?
sudo ss -tlnp 'sport = :3087'
Linux: UDP 3087
sudo ss -ulnp 'sport = :3087'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3087
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3087 '
Windows (Command Prompt)
netstat -ano | findstr :3087
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3087 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3087
From Windows
Test-NetConnection HOST -Port 3087
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3087

Block port 3087 in the firewall

ufw
sudo ufw deny 3087/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3087 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3087 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3087' -Direction Inbound -Protocol TCP -LocalPort 3087 -Action Block
ufw
sudo ufw deny 3087/udp
iptables
sudo iptables -A INPUT -p udp --dport 3087 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3087 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3087' -Direction Inbound -Protocol UDP -LocalPort 3087 -Action Block

Related ports

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