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Port 2626 (gbjd816)

IANA assigns port 2626 to gbjd816.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
gbjd816 TCP gbjd816 George Balesta -
gbjd816 UDP gbjd816 George Balesta -

Check what is listening on port 2626

Linux: is anything listening on TCP 2626?
sudo ss -tlnp 'sport = :2626'
Linux: UDP 2626
sudo ss -ulnp 'sport = :2626'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2626
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2626 '
Windows (Command Prompt)
netstat -ano | findstr :2626
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2626 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2626
From Windows
Test-NetConnection HOST -Port 2626
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2626

Block port 2626 in the firewall

ufw
sudo ufw deny 2626/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2626 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2626 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2626' -Direction Inbound -Protocol TCP -LocalPort 2626 -Action Block
ufw
sudo ufw deny 2626/udp
iptables
sudo iptables -A INPUT -p udp --dport 2626 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2626 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2626' -Direction Inbound -Protocol UDP -LocalPort 2626 -Action Block

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