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Port 2874 (dxmessagebase1)

IANA assigns port 2874 to dxmessagebase1: DX Message Base Transport Protocol.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
dxmessagebase1 TCP DX Message Base Transport Protocol - -
dxmessagebase1 UDP DX Message Base Transport Protocol - -

Check what is listening on port 2874

Linux: is anything listening on TCP 2874?
sudo ss -tlnp 'sport = :2874'
Linux: UDP 2874
sudo ss -ulnp 'sport = :2874'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2874
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2874 '
Windows (Command Prompt)
netstat -ano | findstr :2874
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2874 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2874
From Windows
Test-NetConnection HOST -Port 2874
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2874

Block port 2874 in the firewall

ufw
sudo ufw deny 2874/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2874 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2874 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2874' -Direction Inbound -Protocol TCP -LocalPort 2874 -Action Block
ufw
sudo ufw deny 2874/udp
iptables
sudo iptables -A INPUT -p udp --dport 2874 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2874 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2874' -Direction Inbound -Protocol UDP -LocalPort 2874 -Action Block

Related ports

2872radix2873psrt2875dxmessagebase22876sps-tunnel

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