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Port 2808 (j-lan-p)

IANA assigns port 2808 to j-lan-p: J-LAN-P.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
j-lan-p TCP J-LAN-P Takeshi Sahara -
j-lan-p UDP J-LAN-P Takeshi Sahara -

Check what is listening on port 2808

Linux: is anything listening on TCP 2808?
sudo ss -tlnp 'sport = :2808'
Linux: UDP 2808
sudo ss -ulnp 'sport = :2808'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2808
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2808 '
Windows (Command Prompt)
netstat -ano | findstr :2808
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2808 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2808
From Windows
Test-NetConnection HOST -Port 2808
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2808

Block port 2808 in the firewall

ufw
sudo ufw deny 2808/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2808 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2808 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2808' -Direction Inbound -Protocol TCP -LocalPort 2808 -Action Block
ufw
sudo ufw deny 2808/udp
iptables
sudo iptables -A INPUT -p udp --dport 2808 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2808 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2808' -Direction Inbound -Protocol UDP -LocalPort 2808 -Action Block

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