SPPPCONTROL(8)          OpenBSD System Manager's Manual         SPPPCONTROL(8)

NAME
     spppcontrol - display or set parameters for an sppp interface

SYNOPSIS
     spppcontrol [-v] ifname [parameter[=value]] [...]

DESCRIPTION
     The sppp(4) driver might require a number of additional arguments or op-
     tional parameters besides the settings that can be adjusted with
     ifconfig(8). These are things like authentication protocol parameters,
     but also other tunable configuration variables.  The spppcontrol utility
     can be used to display the current settings, or adjust these parameters
     as required.

     For whatever intent spppcontrol is being called, at least the parameter
     ifname needs to be specified, naming the interface for which the settings
     are to be performed or displayed.  Use ifconfig(8) or netstat(1) to see
     which interfaces are available.

     If no other parameter is given, spppcontrol will just list the current
     settings for ifname and exit.  The reported settings include the current
     PPP phase the interface is in, which can be one of the names dead,
     establish, authenticate, network, or terminate. If an authentication pro-
     tocol is configured for the interface, the name of the protocol to be
     used, as well as the system name to be used or expected will be dis-
     played, plus any possible options to the authentication protocol if ap-
     plicable.  Note that the authentication secrets (sometimes called keys)
     are not being returned by the underlying system call, and are thus not
     displayed.

     If any additional parameter is supplied, superuser privileges are re-
     quired, and the command works in `set' mode.  This is normally done qui-
     etly, unless the option -v is also enabled, which will cause a final
     printout of the settings as described above once all other actions have
     been taken.  Use of this mode will be rejected if the interface is cur-
     rently in any other phase than dead. Note that you can force an interface
     into dead phase by calling ifconfig(8) with the parameter `down'.

     The currently supported parameters include:

           authproto=protoname
                   Set both, his and my authentication protocol to protoname.
                   The protocol name can be one of `chap', `pap', or `none'.
                   In the latter case, the use of an authentication protocol
                   will be turned off for the named interface.  This has the
                   side effect of clearing the other authentication-related
                   parameters for this interface as well (i.e., system name
                   and authentication secret will be forgotten).

           myauthproto=protoname
                   Same as above, but only for my end of the link.  I.e., this
                   is the protocol when remote is authenticator, and I am the
                   peer required to authenticate.

           hisauthproto=protoname
                   Same as above, but only for his end of the link.

           myauthname=name
                   Set my system name for the authentication protocol.

           hisauthname=name
                   Set his system name for the authentication protocol.  For
                   CHAP, this will only be used as a hint, causing a warning
                   message if remote did supply a different name.  For PAP,
                   it's the name remote must use to authenticate himself (in
                   connection with his secret).

           myauthsecret=secret
                   Set my secret (key, password) for use in the authentication
                   phase.  For CHAP, this will be used to compute the response
                   hash value, based on remote's challenge.  For PAP, it will
                   be transmitted as plain text together with the system name.
                   Don't forget to quote the secrets from the shell if they
                   contain shell metacharacters (or whitespace).

           myauthkey=secret
                   Same as above.

           hisauthsecret=secret
                   Same as above, to be used if we are authenticator and the
                   remote peer needs to authenticate.

           hisauthkey=secret
                   Same as above.

           callin  Require remote to authenticate himself only when he's call-
                   ing in, but not when we are caller.  This is required for
                   some peers that do not implement the authentication proto-
                   cols symmetrically (like Ascend routers, for example).

           always  The opposite of callin. Require remote to always authenti-
                   cate, regardless of which side is placing the call.  This
                   is the default, and will not be explicitly displayed in
                   `list' mode.

           norechallenge
                   Only meaningful with CHAP.  Do not re-challenge peer once
                   the initial CHAP handshake was successful.  Used to work
                   around broken peer implementations that can't grok being
                   re-challenged once the connection is up.

           rechallenge
                   With CHAP, send re-challenges at random intervals while the
                   connection is in network phase.  (The intervals are cur-
                   rently in the range of 300 through approximately 800 sec-
                   onds.)  This is the default, and will not be explicitly
                   displayed in `list' mode.

EXAMPLES
     # spppcontrol bppp0
     bppp0:  phase=dead
             myauthproto=chap myauthname="uriah"
             hisauthproto=chap hisauthname="ifb-gw" norechallenge

     Display the settings for bppp0.  The interface is currently in dead
     phase, i.e., the LCP layer is down, and no traffic is possible.  Both
     ends of the connection use the CHAP protocol, my end tells remote the
     system name `uriah', and remote is expected to authenticate by the name
     `ifb-gw'. Once the initial CHAP handshake was successful, no further CHAP
     challenges will be transmitted.  There are supposedly some known CHAP se-
     crets for both ends of the link which are not being shown.

     # spppcontrol bppp0 \
             authproto=chap \
             myauthname=uriah myauthsecret='some secret' \
             hisauthname=ifb-gw hisauthsecret='another' \
             norechallenge

     A possible call to spppcontrol that could have been used to bring the in-
     terface into the state shown by the previous example.

SEE ALSO
     netstat(1), sppp(4), ifconfig(8)

     B. Lloyd, and W. Simpson, PPP Authentication Protocols, RFC 1334.

     W. Simpson, Editor, The Point-to-Point Protocol (PPP), RFC 1661.

     W. Simpson, PPP Challenge Handshake Authentication Protocol (CHAP), RFC
     1994.

HISTORY
     The spppcontrol utility appeared in FreeBSD 3.0.

AUTHORS
     The program was written by Joerg Wunsch, Dresden.

OpenBSD 3.0                    October 11, 1997                              3
