Watchguard Firebox X20E Reference Manual page 53

for nr or nt disables compression in the corresponding direction. Use
nodeflate or deflate 0 to disable Deflate compression entirely.
idle n
Specifies that pppd should disconnect if the link is idle for n seconds. The link
is idle when no data packets (that is, IP packets) are being sent or received.
Note: It is not advisable to use this option with the persist option without the
demand option. If the active-filter option is given, data packets that are
rejected by the specified activity filter also count as the link being idle.
ipcp-accept-local
With this option, pppd will accept the peer's idea of our local IP address, even
if the local IP address was specified in an option.
ipcp-accept-remote
With this option, pppd will accept the peer's idea of its (remote) IP address,
even if the remote IP address was specified in an option.
ipcp-max-configure n
Set the maximum number of IPCP configure-request transmissions to n
(default 10).
ipcp-max-failure n
Set the maximum number of IPCP configure-NAKs returned before starting to
send configure-rejects instead to n (default 10).
ipcp-max-terminate n
Set the maximum number of IPCP terminate-request transmissions to n
(default 3).
ipcp-restart n
Set the IPCP restart interval (retransmission time-out) to n seconds (default 3).
lcp-echo-failure n
If this option is given, pppd will presume the peer to be dead if n LCP echo-
requests are sent without receiving a valid LCP echo-reply. If this happens,
pppd will terminate the connection. Use of this option requires a non-zero
value for the lcp-echo interval parameter. This option can be used to enable
pppd to terminate after the physical connection has been broken (for example,
the modem has hung up) in situations where no hardware modem control
lines are available.
lcp-echo-interval n
If this option is given, pppd will send an LCP echo-request frame to the peer
every n seconds. Normally the peer should respond to the echo-request by
sending an echo-reply. This option can be used with the lcp-echo-failure
option to detect that the peer is no longer connected.
Reference Guide
Pppd requests Deflate compression in preference to BSD-
Compress if the peer can do either.
PPP initialization strings
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