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ppp.8.m4 (31173) ppp.8.m4 (31272)
1.\" $Id: ppp.8,v 1.78 1997/11/11 22:58:12 brian Exp $
1.\" $Id: ppp.8,v 1.79 1997/11/14 20:07:39 brian Exp $
2.Dd 20 September 1995
3.Os FreeBSD
4.Dt PPP 8
5.Sh NAME
6.Nm ppp
7.Nd Point to Point Protocol (a.k.a. iijppp)
8.Sh SYNOPSIS
9.Nm

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1543means that the option will be requested by us.
1544.Dq Disable
1545means that the option will not be requested by us.
1546.Pp
1547.Dq Option
1548may be one of the following:
1549
1550.Bl -tag -width 20
2.Dd 20 September 1995
3.Os FreeBSD
4.Dt PPP 8
5.Sh NAME
6.Nm ppp
7.Nd Point to Point Protocol (a.k.a. iijppp)
8.Sh SYNOPSIS
9.Nm

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1543means that the option will be requested by us.
1544.Dq Disable
1545means that the option will not be requested by us.
1546.Pp
1547.Dq Option
1548may be one of the following:
1549
1550.Bl -tag -width 20
1551.It vjcomp
1552Default: Enabled and Accepted. This option decides if Van Jacobson
1553header compression will be used.
1551.It acfcomp
1552Default: Enabled and Accepted. ACFComp stands for Address and Control
1553Field Compression. Non LCP packets usually have very similar address
1554and control fields - making them easily compressible.
1554
1555
1555.It lqr
1556Default: Disabled and Accepted. This option decides if Link Quality
1557Requests will be sent. LQR is a protocol that allows
1558.Nm
1559to determine that the link is down without relying on the modems
1560carrier detect.
1561
1562.It chap
1563Default: Disabled and Accepted. CHAP stands for Challenge Handshake
1564Authentication Protocol. Only one of CHAP and PAP (below) may be
1565negotiated. With CHAP, the authenticator sends a "challenge" message
1566to its peer. The peer uses a one-way hash function to encrypt the
1567challenge and sends the result back. The authenticator does the same,
1568and compares the results. The advantage of this mechanism is that no
1569passwords are sent across the connection.

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1588
1589Some
1590.Em PPP
1591implementations use "MS-CHAP" rather than MD5 when encrypting the
1592challenge. Refer to the description of the
1593.Dq set encrypt
1594command for further details.
1595
1556.It chap
1557Default: Disabled and Accepted. CHAP stands for Challenge Handshake
1558Authentication Protocol. Only one of CHAP and PAP (below) may be
1559negotiated. With CHAP, the authenticator sends a "challenge" message
1560to its peer. The peer uses a one-way hash function to encrypt the
1561challenge and sends the result back. The authenticator does the same,
1562and compares the results. The advantage of this mechanism is that no
1563passwords are sent across the connection.

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1582
1583Some
1584.Em PPP
1585implementations use "MS-CHAP" rather than MD5 when encrypting the
1586challenge. Refer to the description of the
1587.Dq set encrypt
1588command for further details.
1589
1590.It lqr
1591Default: Disabled and Accepted. This option decides if Link Quality
1592Requests will be sent. LQR is a protocol that allows
1593.Nm
1594to determine that the link is down without relying on the modems
1595carrier detect.
1596
1597.It msext
1598Default: Disabled. This option allows the use of Microsoft's
1599.Em PPP
1600extensions, supporting the negotiation of the DNS and the NetBIOS NS.
1601Enabling this allows us to pass back the values given in "set ns"
1602and "set nbns".
1603
1596.It pap
1597Default: Disabled and Accepted. PAP stands for Password Authentication
1598Protocol. Only one of PAP and CHAP (above) may be negotiated. With
1599PAP, the ID and Password are sent repeatedly to the peer until
1600authentication is acknowledged or the connection is terminated. This
1601is a rather poor security mechanism. It is only performed when the
1602connection is first established.
1603

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1614When using PAP as the client, you need only specify
1615.Dq AuthName
1616and
1617.Dq AuthKey
1618in
1619.Pa /etc/ppp/ppp.conf .
1620PAP is accepted by default.
1621
1604.It pap
1605Default: Disabled and Accepted. PAP stands for Password Authentication
1606Protocol. Only one of PAP and CHAP (above) may be negotiated. With
1607PAP, the ID and Password are sent repeatedly to the peer until
1608authentication is acknowledged or the connection is terminated. This
1609is a rather poor security mechanism. It is only performed when the
1610connection is first established.
1611

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1622When using PAP as the client, you need only specify
1623.Dq AuthName
1624and
1625.Dq AuthKey
1626in
1627.Pa /etc/ppp/ppp.conf .
1628PAP is accepted by default.
1629
1622.It acfcomp
1623Default: Enabled and Accepted. ACFComp stands for Address and Control
1624Field Compression. Non LCP packets usually have very similar address
1625and control fields - making them easily compressible.
1630.It pred1
1631Default: Enabled and Accepted. This option decides if Predictor 1
1632compression will be used.
1626
1627.It protocomp
1628Default: Enabled and Accepted. This option is used to negotiate
1629PFC (Protocol Field Compression), a mechanism where the protocol
1630field number is reduced to one octet rather than two.
1631
1633
1634.It protocomp
1635Default: Enabled and Accepted. This option is used to negotiate
1636PFC (Protocol Field Compression), a mechanism where the protocol
1637field number is reduced to one octet rather than two.
1638
1632.It pred1
1633Default: Enabled and Accepted. This option decides if Predictor 1
1634compression will be used.
1635
1636.It msext
1637Default: Disabled. This option allows the use of Microsoft's
1638.Em PPP
1639extensions, supporting the negotiation of the DNS and the NetBIOS NS.
1640Enabling this allows us to pass back the values given in "set ns"
1641and "set nbns".
1642
1639.It vjcomp
1640Default: Enabled and Accepted. This option decides if Van Jacobson
1641header compression will be used.
1643.El
1642.El
1643
1644.Pp
1644The following options are not actually negotiated with the peer.
1645Therefore, accepting or denying them makes no sense.
1646
1647.Bl -tag -width 20
1645The following options are not actually negotiated with the peer.
1646Therefore, accepting or denying them makes no sense.
1647
1648.Bl -tag -width 20
1648.It proxy
1649Default: Disabled. Enabling this option will tell
1650.Nm
1651to proxy ARP for the peer.
1652
1653.It passwdauth
1654Default: Disabled. Enabling this option will tell the PAP authentication
1655code to use the password file (see
1656.Xr passwd 5 )
1657to authenticate the caller rather than the
1658.Pa /etc/ppp/ppp.secret
1659file.
1660
1649.It passwdauth
1650Default: Disabled. Enabling this option will tell the PAP authentication
1651code to use the password file (see
1652.Xr passwd 5 )
1653to authenticate the caller rather than the
1654.Pa /etc/ppp/ppp.secret
1655file.
1656
1657.It proxy
1658Default: Disabled. Enabling this option will tell
1659.Nm
1660to proxy ARP for the peer.
1661
1662.It throughput
1663Default: Disabled. Enabling this option will tell
1664.Nm
1665to gather thoroughput statistics. Input and output is sampled over
1666a rolling 5 second window, and current, best and total figures are
1667retained. This data is output when the relevent
1668.Em PPP
1669layer shuts down, and is also available using the
1670.Dq show
1671command. Troughput statistics are available at the
1672.Dq IPCP
1673and
1674.Dq modem
1675levels.
1676
1661.It utmp
1662Default: Enabled. Normally, when a user is authenticated using PAP or
1663CHAP, and when
1664.Nm
1665is running in
1666.Fl direct
1667mode, an entry is made in the utmp and wtmp files for that user. Disabling
1668this option will tell

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1677.It utmp
1678Default: Enabled. Normally, when a user is authenticated using PAP or
1679CHAP, and when
1680.Nm
1681is running in
1682.Fl direct
1683mode, an entry is made in the utmp and wtmp files for that user. Disabling
1684this option will tell

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