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Port 7003 (afs3-vlserver)

IANA assigns port 7003 to afs3-vlserver: volume location database.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
afs3-vlserver TCP volume location database - -
afs3-vlserver UDP volume location database - -

Check what is listening on port 7003

Linux: is anything listening on TCP 7003?
sudo ss -tlnp 'sport = :7003'
Linux: UDP 7003
sudo ss -ulnp 'sport = :7003'
Linux / macOS: which process owns the port
sudo lsof -nP -i :7003
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':7003 '
Windows (Command Prompt)
netstat -ano | findstr :7003
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 7003 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 7003
From Windows
Test-NetConnection HOST -Port 7003
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 7003

Block port 7003 in the firewall

ufw
sudo ufw deny 7003/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 7003 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 7003 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 7003' -Direction Inbound -Protocol TCP -LocalPort 7003 -Action Block
ufw
sudo ufw deny 7003/udp
iptables
sudo iptables -A INPUT -p udp --dport 7003 -j DROP
nftables
sudo nft add rule inet filter input udp dport 7003 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 7003' -Direction Inbound -Protocol UDP -LocalPort 7003 -Action Block

Related ports

7001Cassandra TLS / WebLogic7002afs3-prserver7004afs3-kaserver7005afs3-volser

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