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Port 7004 (afs3-kaserver)

IANA assigns port 7004 to afs3-kaserver: AFS/Kerberos authentication service.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
afs3-kaserver TCP AFS/Kerberos authentication service - -
afs3-kaserver UDP AFS/Kerberos authentication service - -

Check what is listening on port 7004

Linux: is anything listening on TCP 7004?
sudo ss -tlnp 'sport = :7004'
Linux: UDP 7004
sudo ss -ulnp 'sport = :7004'
Linux / macOS: which process owns the port
sudo lsof -nP -i :7004
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':7004 '
Windows (Command Prompt)
netstat -ano | findstr :7004
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 7004 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 7004
From Windows
Test-NetConnection HOST -Port 7004
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 7004

Block port 7004 in the firewall

ufw
sudo ufw deny 7004/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 7004 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 7004 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 7004' -Direction Inbound -Protocol TCP -LocalPort 7004 -Action Block
ufw
sudo ufw deny 7004/udp
iptables
sudo iptables -A INPUT -p udp --dport 7004 -j DROP
nftables
sudo nft add rule inet filter input udp dport 7004 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 7004' -Direction Inbound -Protocol UDP -LocalPort 7004 -Action Block

Related ports

7002afs3-prserver7003afs3-vlserver7005afs3-volser7006afs3-errors

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