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Port 48048 (juka)

IANA assigns port 48048 to juka: Juliar Programming Language Protocol.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference
juka TCP Juliar Programming Language Protocol Juliar -

Registry dates for this port: registered 2018-02-16, last modified 2019-03-08.

Check what is listening on port 48048

Linux: is anything listening on TCP 48048?
sudo ss -tlnp 'sport = :48048'
Linux / macOS: which process owns the port
sudo lsof -nP -i :48048
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':48048 '
Windows (Command Prompt)
netstat -ano | findstr :48048
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 48048 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 48048
From Windows
Test-NetConnection HOST -Port 48048

Block port 48048 in the firewall

ufw
sudo ufw deny 48048/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 48048 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 48048 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 48048' -Direction Inbound -Protocol TCP -LocalPort 48048 -Action Block

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