Watchguard Firebox X20E Reference Manual

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Reference Guide 51Modem initialization stringsnocrtsctsDisable hardware flow control (that is, RTS/CTS) on the serial port. If neitherthe crtscts nor the nocrtscts option is given, the hardware flow control settingfor the serial port is left unchanged.noipdefaultDisables the default behavior when no local IP address is specified, which is todetermine (if possible) the local IP address from the hostname. With thisoption, the peer will have to supply the local IP address during IPCPnegotiation (unless it was specified explicitly on the command line or in anoptions file).nomagicDisable magic number negotiation. With this option, pppd cannot detect alooped-back line. This option should only be needed if the peer is buggy.nopersistExit once a connection has been made and terminated. This is the defaultunless the persist or demand option has been specified.novjccompDisable the connection-ID compression option in Van Jacobson-style TCP/IPheader compression. With this option, pppd will not omit the connection-IDbyte from Van Jacobson compressed TCP/IP headers, nor ask the peer to doso.silentPppd will not transmit LCP packets to initiate a connection until a valid LCPpacket is received from the peer (as for the ìpassiveî option with olderversions of pppd).xonxoffUse software flow control (that is, XON/XOFF) to control the flow of data onthe serial port.Modem initialization stringsThese parameters specify a chat session that occurs between the Firebox and themodem to properly initialize the modem. In most cases the default initializationswork with a wide variety of modems. The default initializations are known to workwith the list of approved modems.In the default initializations below, the parameters marked with ^ specify what theFirebox should expect back from the modem, and the portions marked with '_____'specify what is to be sent to the modem: