FortiMail open ports
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When operating in its default configuration, FortiMail does not accept TCP or UDP connections on any port except port1 and port2 network interfaces, which accept:
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Incoming ports |
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Purpose |
Protocol/Port |
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Admin by Console or PC |
SSH, Telnet, HTTP, SSH, Console |
TCP/443 or TCP/80 or TCP/22 or TCP/23 |
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Email Client |
Quarantine View/Retrieve |
TCP/80 or TCP/443 or TCP/110 |
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SMTP or SMTPS |
TCP/25 or TCP/465 |
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POP3 or POP3S |
TCP/110 or TCP/995 (server mode only) |
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IMAP or IMAPS |
TCP/143 or TCP/993 (server mode only) |
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WebDAV and CalDAV |
TCP/8008 |
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FortiMail |
Base port for HA heartbeat signal |
UDP/20000 |
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Synchronization control |
UDP/20001 |
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File synchronization |
TCP/20002 |
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Data synchronization |
TCP/20003 |
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Checksum synchronization |
TCP/20004 |
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HA service monitoring (remote SMTP) |
TCP/25 |
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HA service monitoring (remote HTTP) |
TCP/80 |
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HA service monitoring (remote POP3) |
TCP/110 |
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HA service monitoring (remote IMAP) |
TCP/143 |
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Clear Text Central Quarantine |
TCP/514 |
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SSL Central Quarantine |
TCP/6514 |
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SNMP Poll |
TCP/161 |
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AV Push |
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AV Push |
UDP/9443 |
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External Email Server |
SMTP or SMTPS |
TCP/25 or 465 |
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Storage: iSCI, NFS |
TCP/3260 (iSCI), TCP/2049 (NFS) |
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Config Backup |
SFTP / FTP |
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Mail Data Backup |
NFS, SMB/CIFS, SSH, external USB (direct connected), iSCSI |
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Protected Email Server |
SMTP or SMTPS |
TCP/25 or 465 |
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Outgoing ports |
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|---|---|---|
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Purpose |
Protocol/Port |
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OFTP |
UDP/514 |
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SNMP Traps |
UDP/162 |
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AV/AS Query |
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AS Rating |
UDP/53 or 8888, 8889 |
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AV/AS Update |
TCP/443 |
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FortiMail |
Base port for HA heartbeat signal |
UDP/20000 |
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Synchronization control |
UDP/20001 |
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File synchronization |
TCP/20002 |
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Data synchronization |
TCP/20003 |
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Checksum synchronization |
TCP/20004 |
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HA service monitoring (remote SMTP) |
TCP/25 |
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HA service monitoring (remote HTTP) |
TCP/80 |
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HA service monitoring (remote POP3) |
TCP/110 |
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HA service monitoring (remote IMAP) |
TCP/143 |
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Clear Text Central Quarantine |
TCP/514 |
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SSL Central Quarantine |
TCP/6514 |
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External Email Server |
SMTP or SMTPS |
TCP/25 or TCP/465 |
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Protected Email Server |
SMTP or SMTPS |
TCP/25 or TCP/465 |
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POP3 Auth |
TCP/110 |
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IMAP Auth |
TCP/143 |
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Others |
Dyn DNS |
TCP/80 * |
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DNS, RBL |
UDP/53 |
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NTP |
UDP/123 |
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Alert Email |
TCP/25 |
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LDAP or LDAPS |
TCP/389 or TCP/636 |
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RADIUS Auth |
TCP/1812 |
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NAS |
TCP/21, TCP/22, TCP/2049 |
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OCSP (for PKI user) |
TCP/80, or defined by certificate |
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FortiSandbox / FortiSandbox Cloud |
Communication |
TCP/443, TCP/514 |
* FortiMail generates outbound traffic and sends an HTTP SYN request via TCP/80. The Fortinet RSS Feed widget provides a convenient display of the latest security advisories and discovered threats from Fortinet. Also, if an email message contains a shortened URI that redirects to another URI, it would cause FortiMail to send an HTTP SYN request to the shortened URI to get the redirected URI.
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FortiMail uses the following URLs to access the FortiGuard Distribution Network (FDN):
Furthermore, FortiMail performs these queries and updates listed below using the following ports and protocols:
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