Port 514: Syslog
Sending log messages to a central log server. Unauthenticated: anyone who can reach it can write fake logs. Keep it on a private network.
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Port Lookup
Port 514 at a glance
Port514
ProtocolUDP
ServiceSyslog
Open to the Internet?No, keep it on a private network
See What Is Listeningss -lntup | grep ':514 '
Test From Outsidenmap -sU -p 514 your-server
Block with UFWufw deny 514/udp
Block with nftablesnft add rule inet filter input udp dport 514 drop
Syslog uses UDP port 514. Sending log messages to a central log server.
Unauthenticated: anyone who can reach it can write fake logs. Keep it on a private network.
If ss shows something listening on port 514 on a public address, bind it to 127.0.0.1 or a private interface in the service's own configuration, and drop the port in the firewall as well.
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 514 used for?
Syslog. Sending log messages to a central log server.
Is it safe to open port 514?
No, keep it on a private network. Unauthenticated: anyone who can reach it can write fake logs. Keep it on a private network.
How do I check if port 514 is open?
On the server, ss -lntup | grep ':514 ' shows what is listening. From another machine, nmap -sU -p 514 your-server shows whether the firewall lets it through.
How do I block port 514?
With UFW: ufw deny 514/udp. With nftables, add a drop rule for dport 514 in your input chain.
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