HTTPfy

Port 2659 (sns-query)

IANA assigns port 2659 to sns-query: SNS Query.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
sns-query TCP SNS Query Mary Holstege -
sns-query UDP SNS Query Mary Holstege -

Check what is listening on port 2659

Linux: is anything listening on TCP 2659?
sudo ss -tlnp 'sport = :2659'
Linux: UDP 2659
sudo ss -ulnp 'sport = :2659'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2659
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2659 '
Windows (Command Prompt)
netstat -ano | findstr :2659
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2659 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2659
From Windows
Test-NetConnection HOST -Port 2659
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2659

Block port 2659 in the firewall

ufw
sudo ufw deny 2659/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2659 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2659 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2659' -Direction Inbound -Protocol TCP -LocalPort 2659 -Action Block
ufw
sudo ufw deny 2659/udp
iptables
sudo iptables -A INPUT -p udp --dport 2659 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2659 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2659' -Direction Inbound -Protocol UDP -LocalPort 2659 -Action Block

Related ports

2657sns-dispatcher2658sns-admin2660gcmonitor2661olhost

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