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Port 2799 (icon-discover)

IANA assigns port 2799 to icon-discover: ICON Discover.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
icon-discover TCP ICON Discover Alexander Falk -
icon-discover UDP ICON Discover Alexander Falk -

Check what is listening on port 2799

Linux: is anything listening on TCP 2799?
sudo ss -tlnp 'sport = :2799'
Linux: UDP 2799
sudo ss -ulnp 'sport = :2799'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2799
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2799 '
Windows (Command Prompt)
netstat -ano | findstr :2799
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2799 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2799
From Windows
Test-NetConnection HOST -Port 2799
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2799

Block port 2799 in the firewall

ufw
sudo ufw deny 2799/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2799 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2799 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2799' -Direction Inbound -Protocol TCP -LocalPort 2799 -Action Block
ufw
sudo ufw deny 2799/udp
iptables
sudo iptables -A INPUT -p udp --dport 2799 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2799 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2799' -Direction Inbound -Protocol UDP -LocalPort 2799 -Action Block

Related ports

2797esp-encap2798tmesis-upshot2800acc-raid2801igcp

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