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Port 2842 (l3-hawk)

IANA assigns port 2842 to l3-hawk.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
l3-hawk TCP l3-hawk Dolores Scott 2 -
l3-hawk UDP l3-hawk Dolores Scott 2 -

Check what is listening on port 2842

Linux: is anything listening on TCP 2842?
sudo ss -tlnp 'sport = :2842'
Linux: UDP 2842
sudo ss -ulnp 'sport = :2842'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2842
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2842 '
Windows (Command Prompt)
netstat -ano | findstr :2842
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2842 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2842
From Windows
Test-NetConnection HOST -Port 2842
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2842

Block port 2842 in the firewall

ufw
sudo ufw deny 2842/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2842 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2842 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2842' -Direction Inbound -Protocol TCP -LocalPort 2842 -Action Block
ufw
sudo ufw deny 2842/udp
iptables
sudo iptables -A INPUT -p udp --dport 2842 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2842 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2842' -Direction Inbound -Protocol UDP -LocalPort 2842 -Action Block

Related ports

2840l3-exprt2841l3-ranger2843pdnet2844bpcp-poll

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