REAL
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Provides an ALG for the RealAudio and RealVideo Protocol. The
REAL ALG processes Progressive Networks Audio (PNA) packets over the
TCP connection and looks for the control commands in the packet where
the port number is embedded. It performs NAT and opens gates for the
UDP data connection.
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Select the check box to enable the ALG.
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RTSP
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Provides an ALG for the Real-Time Streaming Protocol.
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Select the check box to enable the ALG.
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| Basic Internet
Protocols |
DNS
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Provides an ALG for the Domain Name System. The DNS ALG monitors
DNS query and reply packets and closes session if the DNS flag indicates
the packet is a reply message.
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Select the check box to enable the ALG.
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FTP
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Provides an ALG for the File Transfer Protocol. The FTP ALG
monitors PORT, PASV and 227 commands. It performs NAT of IP/port in
the message and gate opening on the device as necessary. The FTP ALG
supports FTP put and FTP get command blocking. When the FTP_NO_PUT
or FTP_NO_GET is set in the policy, the FTP ALG sends back a blocking
command and closes the associated opened gate when FTP STOR or FTP
RETR command is observed.
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Select the check box to enable the ALG.
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TFTP
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Provides an ALG for the Trivial File Transfer Protocol. The
TFTP ALG processes TFTP packet that initiate the request and opens
a gate to allow return packets from the reverse direction to the port
that sends the request.
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Select the check box to enable the ALG.
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TALK
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Provides an ALG for the TALK Protocol. The TALK protocol uses
UDP port 517 and port 518 for control channel connections. The talk
program consists of a server and a client. The server handles client
notifications and helps to establish talk sessions. There are two
types of talk servers: ntalk and talkd. The TALK ALG processes packets
of both ntalk and talkd formats. It also performs NAT and gate opening
as necessary.
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Select the check box to enable the ALG.
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RSH
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Provides an ALG for the Provides an ALG for the Remote Shell.
The RSH ALG handles TCP packets destined for port 514 and process
the RSH port command. The RSH ALG performs NAT on the port in the
port command and opens gates as necessary.
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Select the check box to enable the ALG.
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PPTP
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Provides an ALG for the Point-to-Point Tunneling Protocol. The
PPTP is a layer 2 protocol that tunnels PPP data across TCP/IP networks.
The PPTP client is freely available on Windows systems and is widely
deployed for building Virtual Private Networks (VPNs).
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Select the check box to enable the ALG.
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| Database
and Network Support Protocols |
SQL
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Provides an ALG for the Structured Query Language. The SQLNET
ALG processes SQL TNS response frame from the server side. It parses
the packet and looks for (HOST=ipaddress), (PORT=port) pattern and
performs NAT and gate opening on the client side for the TCP data
channel.
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Select the check box to enable the ALG.
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