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Port 2684 (mpnjsosv)

IANA assigns port 2684 to mpnjsosv.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
mpnjsosv TCP mpnjsosv - -
mpnjsosv UDP mpnjsosv - -

Check what is listening on port 2684

Linux: is anything listening on TCP 2684?
sudo ss -tlnp 'sport = :2684'
Linux: UDP 2684
sudo ss -ulnp 'sport = :2684'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2684
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2684 '
Windows (Command Prompt)
netstat -ano | findstr :2684
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2684 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2684
From Windows
Test-NetConnection HOST -Port 2684
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2684

Block port 2684 in the firewall

ufw
sudo ufw deny 2684/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2684 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2684 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2684' -Direction Inbound -Protocol TCP -LocalPort 2684 -Action Block
ufw
sudo ufw deny 2684/udp
iptables
sudo iptables -A INPUT -p udp --dport 2684 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2684 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2684' -Direction Inbound -Protocol UDP -LocalPort 2684 -Action Block

Related ports

2681mpnjsomb2683ncdloadbalance2685mpnjsocl2686mpnjsomg

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