Port 80: HTTP
Unencrypted web traffic. Keep it open to redirect visitors to HTTPS and for Let's Encrypt HTTP-01 validation.
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Port Lookup
Port 80 at a glance
Port80
ProtocolTCP
ServiceHTTP
Open to the Internet?Yes, if you run this service publicly
See What Is Listeningss -lntup | grep ':80 '
Test From Outsidenc -zv your-server 80
Block with UFWufw deny 80/tcp
Block with nftablesnft add rule inet filter input tcp dport 80 drop
HTTP uses TCP port 80. Unencrypted web traffic.
Keep it open to redirect visitors to HTTPS and for Let's Encrypt HTTP-01 validation.
Open port 80 only on servers that run HTTP, and keep the software patched: public services are scanned within minutes of going online.
Other Ports
20 FTP Data21 FTP22 SSH23 Telnet25 SMTP53 DNS67 DHCP Server80 HTTP110 POP3123 NTP143 IMAP161 SNMP389 LDAP443 HTTPS445 SMB465 SMTPS514 Syslog587 Mail Submission853 DNS over TLS993 IMAPS995 POP3S1194 OpenVPN1433 Microsoft SQL Server1900 SSDP / UPnP2049 NFS2083 cPanel (SSL)2087 WHM (SSL)3306 MySQL / MariaDB3389 RDP3478 STUN / TURN5060 SIP5432 PostgreSQL5900 VNC6379 Redis8006 Proxmox VE8080 HTTP Alternate8443 HTTPS Alternate11211 Memcached25565 Minecraft27017 MongoDB51820 WireGuard
Questions
What is port 80 used for?
HTTP. Unencrypted web traffic.
Is it safe to open port 80?
Yes, if you run this service publicly. Keep it open to redirect visitors to HTTPS and for Let's Encrypt HTTP-01 validation.
How do I check if port 80 is open?
On the server, ss -lntup | grep ':80 ' shows what is listening. From another machine, nc -zv your-server 80 shows whether the firewall lets it through.
How do I block port 80?
With UFW: ufw deny 80/tcp. With nftables, add a drop rule for dport 80 in your input chain.
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