Fortinet 50A user manual 150, Gre

Services			Firewall configuration
	Table 18: FortiGate predefined services (Continued)
	Service name	Description	Protocol	Port
	GRE	Generic Routing Encapsulation. A protocol		47
		that allows an arbitrary network protocol to be
		transmitted over any other arbitrary network
		protocol, by encapsulating the packets of the
		protocol within GRE packets.
	AH	Authentication Header. AH provides source		51
		host authentication and data integrity, but not
		secrecy. This protocol is used for
		authentication by IPSec remote gateways set
		to aggressive mode.
	ESP	Encapsulating Security Payload. This service		50
		is used by manual key and AutoIKE VPN
		tunnels for communicating encrypted data.
		AutoIKE key VPN tunnels use ESP after
		establishing the tunnel using IKE.
	AOL	AOL instant messenger protocol.	tcp	5190-5194
	BGP	Border Gateway Protocol routing protocol.	tcp	179
		BGP is an interior/exterior routing protocol.
	DHCP-Relay	Dynamic Host Configuration Protocol (DHCP)	udp	67
		allocates network addresses and delivers
		configuration parameters from DHCP servers
		to hosts.
	DNS	Domain name service for translating domain	tcp	53
		names into IP addresses.
			udp	53
	FINGER	A network service that provides information	tcp	79
		about users.
	FTP	FTP service for transferring files.	tcp	21
	GOPHER	Gopher communication service. Gopher	tcp	70
		organizes and displays Internet server
		contents as a hierarchically structured list of
		files.
	H323	H.323 multimedia protocol. H.323 is a	tcp	1720, 1503
		standard approved by the International
		Telecommunication Union (ITU) that defines
		how audiovisual conferencing data is
		transmitted across networks.
	HTTP	HTTP is the protocol used by the word wide	tcp	80
		web for transferring data for web pages.
	HTTPS	HTTP with secure socket layer (SSL) service	tcp	443
		for secure communication with web servers.
	IKE	IKE is the protocol to obtain authenticated	udp	500
		keying material for use with ISAKMP for
		IPSEC.
	IMAP	Internet Message Access Protocol is a	tcp	143
		protocol used for retrieving email messages.
	Internet-Locator-	Internet Locator Service includes LDAP, User	tcp	389
	Service	Locator Service, and LDAP over TLS/SSL.
	IRC	Internet Relay Chat allows people connected	tcp	6660-6669
		to the Internet to join live discussions.
	L2TP	L2TP is a PPP-based tunnel protocol for	tcp	1701
		remote access.

150 Fortinet Inc.