diff options
Diffstat (limited to 'sbin/ifconfig/ifconfig.8')
| -rw-r--r-- | sbin/ifconfig/ifconfig.8 | 33 |
1 files changed, 31 insertions, 2 deletions
diff --git a/sbin/ifconfig/ifconfig.8 b/sbin/ifconfig/ifconfig.8 index 52efd5a2038..003fb9ba4ac 100644 --- a/sbin/ifconfig/ifconfig.8 +++ b/sbin/ifconfig/ifconfig.8 @@ -1,4 +1,4 @@ -.\" $OpenBSD: ifconfig.8,v 1.193 2010/04/02 21:16:24 deraadt Exp $ +.\" $OpenBSD: ifconfig.8,v 1.194 2010/04/06 14:12:10 stsp Exp $ .\" $NetBSD: ifconfig.8,v 1.11 1996/01/04 21:27:29 pk Exp $ .\" $FreeBSD: ifconfig.8,v 1.16 1998/02/01 07:03:29 steve Exp $ .\" @@ -31,7 +31,7 @@ .\" .\" @(#)ifconfig.8 8.4 (Berkeley) 6/1/94 .\" -.Dd $Mdocdate: April 2 2010 $ +.Dd $Mdocdate: April 6 2010 $ .Dt IFCONFIG 8 .Os .Sh NAME @@ -1103,6 +1103,7 @@ authentication. .Bk -words .Ar inet6-interface .Op Oo Fl Oc Cm anycast +.Op Oo Fl Oc Cm autoconfprivacy .Op Cm eui64 .Op Cm pltime Ar n .Op Oo Fl Oc Cm tentative @@ -1115,6 +1116,34 @@ The options are as follows: Set the IPv6 anycast address bit. .It Fl anycast Clear the IPv6 anycast address bit. +.It Cm autoconfprivacy +Enable privacy extensions for stateless IPv6 address autoconfiguration +(RFC 4941) on the interface. +The purpose of these extensions is to prevent tracking of individual +devices which connect to the IPv6 internet from different networks +using stateless autoconfiguration. +The interface identifier often remains constant and provides the lower +64 bits of an autoconfigured IPv6 address, facilitating tracking of +individual devices (and hence, potentially, users of these devices) +over long periods of time (weeks to months to years). +When these extensions are active, random interface identifiers are used +for autoconfigured addresses. +Autoconfigured addresses are also made temporary, which means that they +will automatically be replaced regularly. +Temporary addresses are deprecated after 24 hours. +Once a temporary address has been deprecated, a new temporary address +will be configured upon reception of a router advertisement indicating +that the prefix is still valid. +Deprecated addresses will not be used for new connections as long as a +non-deprecated address remains available. +Temporary addresses become invalid after one week, at which time they +will be removed from the interface. +Address lifetime extension through router advertisements is ignored +for temporary addresses. +.It Fl autoconfprivacy +Disable IPv6 autoconf privacy extensions on the interface. +Currently configured addresses will not be removed until they become +invalid. .It Cm eui64 Fill the interface index .Pq the lowermost 64th bit of an IPv6 address |