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Port 4593 (ipt-anri-anri)

IANA assigns port 4593 to ipt-anri-anri: IPT (ANRI-ANRI).

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
ipt-anri-anri TCP IPT (ANRI-ANRI) - -
ipt-anri-anri UDP IPT (ANRI-ANRI) - -

Check what is listening on port 4593

Linux: is anything listening on TCP 4593?
sudo ss -tlnp 'sport = :4593'
Linux: UDP 4593
sudo ss -ulnp 'sport = :4593'
Linux / macOS: which process owns the port
sudo lsof -nP -i :4593
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':4593 '
Windows (Command Prompt)
netstat -ano | findstr :4593
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 4593 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 4593
From Windows
Test-NetConnection HOST -Port 4593
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 4593

Block port 4593 in the firewall

ufw
sudo ufw deny 4593/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 4593 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 4593 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 4593' -Direction Inbound -Protocol TCP -LocalPort 4593 -Action Block
ufw
sudo ufw deny 4593/udp
iptables
sudo iptables -A INPUT -p udp --dport 4593 -j DROP
nftables
sudo nft add rule inet filter input udp dport 4593 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 4593' -Direction Inbound -Protocol UDP -LocalPort 4593 -Action Block

Related ports

4591l3t-at-an4592hrpd-ith-at-an4594ias-session4595ias-paging

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