Port 2082 cPanel · TCP

What runs on port 2082

cPanel's plaintext web interface. Use 2083 (TLS) instead; most hosts redirect automatically. cPanel's other ports: 2086/2087 for WHM, 2095/2096 for webmail.

Software that uses it: cPanel

Should port 2082 be open?

Disable it. This is a legacy or insecure protocol. The recommendation is not to firewall it but to turn the service off and use the modern replacement.

• If your host still answers on 2082 without redirecting, open a ticket.

Check port 2082

# on the host: is anything listening, and which process?
ss -ltnp 'sport = :2082'
sudo lsof -i :2082

# from another machine: is it reachable?
nc -zv host 2082
nmap -p 2082 host
curl -v telnet://host:2082      # raw TCP connect test, Ctrl-C to leave

A port that answers from the internet when it should not is the finding; nmap from a machine outside your network (or a VPS) is the honest test, because scans from inside the LAN pass the firewall you are trying to verify.

Allow or block port 2082

# ufw (Ubuntu/Debian)
sudo ufw allow from 10.0.0.0/8 to any port 2082 proto tcp
sudo ufw deny 2082/tcp

# nftables
nft add rule inet filter input ip saddr 10.0.0.0/8 tcp dport 2082 accept
nft add rule inet filter input tcp dport 2082 drop

# iptables (legacy)
iptables -A INPUT -p tcp --dport 2082 -s 10.0.0.0/8 -j ACCEPT
iptables -A INPUT -p tcp --dport 2082 -j DROP

# firewalld
sudo firewall-cmd --permanent --add-rich-rule='rule family=ipv4 source address=10.0.0.0/8 port port=2082 protocol=tcp accept'

Replace 10.0.0.0/8 with the networks that need access. Allowing by source address is the rule that matters; "allow 2082" with no source is just "open".

Putting it behind nginx

server {
    listen 443 ssl;
    server_name app.example.com;
    location / {
        proxy_pass http://127.0.0.1:2082;
        proxy_set_header Host $host;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto https;
    }
}

Then make the application listen on 127.0.0.1:2082 only. Test which location block a request hits with the nginx location tester.

Related ports

• 2083 cPanel (TLS)
• 2087 WHM (TLS) — cPanel root panel
• 443 HTTPS — Web over TLS; UDP for HTTP/3 (QUIC)

Part of the port number reference. Ports are 16-bit numbers; see also the subnet calculator and the packet decoder, which shows ports inside TCP and UDP headers.

Questions