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Port 3632 (distcc)

IANA assigns port 3632 to distcc: distributed compiler.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
distcc TCP distributed compiler
Defined TXT keys: None Martin Pool -
distcc UDP distributed compiler
Defined TXT keys: None Martin Pool -

Registry dates for this port: registered 2002-11.

Check what is listening on port 3632

Linux: is anything listening on TCP 3632?
sudo ss -tlnp 'sport = :3632'
Linux: UDP 3632
sudo ss -ulnp 'sport = :3632'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3632
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3632 '
Windows (Command Prompt)
netstat -ano | findstr :3632
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3632 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3632
From Windows
Test-NetConnection HOST -Port 3632
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3632

Block port 3632 in the firewall

ufw
sudo ufw deny 3632/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3632 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3632 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3632' -Direction Inbound -Protocol TCP -LocalPort 3632 -Action Block
ufw
sudo ufw deny 3632/udp
iptables
sudo iptables -A INPUT -p udp --dport 3632 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3632 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3632' -Direction Inbound -Protocol UDP -LocalPort 3632 -Action Block

Related ports

3630cs-remote-db3631cs-services3633wacp3634hlibmgr

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