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Port 2643 (gte-samp)

IANA assigns port 2643 to gte-samp: GTE-SAMP.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
gte-samp TCP GTE-SAMP Asher Altman -
gte-samp UDP GTE-SAMP Asher Altman -

Check what is listening on port 2643

Linux: is anything listening on TCP 2643?
sudo ss -tlnp 'sport = :2643'
Linux: UDP 2643
sudo ss -ulnp 'sport = :2643'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2643
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2643 '
Windows (Command Prompt)
netstat -ano | findstr :2643
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2643 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2643
From Windows
Test-NetConnection HOST -Port 2643
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2643

Block port 2643 in the firewall

ufw
sudo ufw deny 2643/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2643 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2643 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2643' -Direction Inbound -Protocol TCP -LocalPort 2643 -Action Block
ufw
sudo ufw deny 2643/udp
iptables
sudo iptables -A INPUT -p udp --dport 2643 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2643 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2643' -Direction Inbound -Protocol UDP -LocalPort 2643 -Action Block

Related ports

2641hdl-srv2642tragic2644travsoft-ipx-t2645novell-ipx-cmd

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