HTTPfy

Port 3624 (dist-upgrade)

IANA assigns port 3624 to dist-upgrade: Distributed Upgrade Port.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
dist-upgrade TCP Distributed Upgrade Port Jason Schoon -
dist-upgrade UDP Distributed Upgrade Port Jason Schoon -

Registry dates for this port: registered 2002-10.

Check what is listening on port 3624

Linux: is anything listening on TCP 3624?
sudo ss -tlnp 'sport = :3624'
Linux: UDP 3624
sudo ss -ulnp 'sport = :3624'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3624
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3624 '
Windows (Command Prompt)
netstat -ano | findstr :3624
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3624 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3624
From Windows
Test-NetConnection HOST -Port 3624
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3624

Block port 3624 in the firewall

ufw
sudo ufw deny 3624/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3624 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3624 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3624' -Direction Inbound -Protocol TCP -LocalPort 3624 -Action Block
ufw
sudo ufw deny 3624/udp
iptables
sudo iptables -A INPUT -p udp --dport 3624 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3624 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3624' -Direction Inbound -Protocol UDP -LocalPort 3624 -Action Block

Related ports

3622ff-lr-port3623haipe-discover3625volley3626bvcdaemon-port

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