Various language fixes. From FreeBSD.
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.\" $NetBSD: faith.4,v 1.10 2003/09/07 16:22:27 wiz Exp $
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.\" $NetBSD: faith.4,v 1.11 2010/01/09 09:19:18 mbalmer Exp $
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.\" $KAME: faith.4,v 1.10 2001/06/30 00:42:48 itojun Exp $
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.\"
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.\" Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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@ -53,15 +53,15 @@ and
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subcommands.
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.Pp
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Special action will be taken when IPv6 TCP traffic is seen on a router,
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and routing table suggests to route it to
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and the routing table suggests to route it to the
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.Nm
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interface.
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In this case, the packet will be accepted by the router,
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regardless of list of IPv6 interface addresses assigned to the router.
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The packet will be captured by an IPv6 TCP socket, if it has
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regardless of the list of IPv6 interface addresses assigned to the router.
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The packet will be captured by an IPv6 TCP socket, if it has the
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.Dv IN6P_FAITH
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flag turned on and it has matching address/port pairs.
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In result,
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flag turned on and matching address/port pairs.
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As a result,
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.Nm
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will let you capture IPv6 TCP traffic to some specific destination addresses.
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Userland programs, such as
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@ -73,43 +73,42 @@ to get the IPv6 destination address specified by the client,
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and perform application-specific address mapping to relay IPv6 TCP to IPv4 TCP.
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.Pp
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.Dv IN6P_FAITH
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flag on IPv6 TCP socket can be set by using
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flag on a IPv6 TCP socket can be set by using
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.Xr setsockopt 2 ,
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with level equals to
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with level
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.Dv IPPROTO_IPV6
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and optname equals to
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and optname
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.Dv IPv6_FAITH .
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.Pp
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To handle error reports by ICMPv6, some of ICMPv6 packets routed to
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To handle error reports by ICMPv6, some ICMPv6 packets routed to an
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.Nm
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interface will be delivered to IPv6 TCP, as well.
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.Pp
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To understand how
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.Nm
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can be used, take a look at source code of
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can be used, take a look at the source code of
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.Xr faithd 8 .
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.Pp
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As
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As the
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.Nm
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interface implements potentially dangerous operation,
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great care must be taken when configuring
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.Nm
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interface.
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To avoid possible misuse,
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interface implements potentially dangerous operations,
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great care must be taken when configuring it.
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To avoid possible misuse, the
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.Xr sysctl 8
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variable
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.Li net.inet6.ip6.keepfaith
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must be set to
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.Li 1
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prior to the use of the interface.
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prior to using the interface.
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When
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.Li net.inet6.ip6.keepfaith
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is
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.Li 0 ,
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no packet will be captured by
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no packets will be captured by the
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.Nm
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interface.
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.Pp
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The
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.Nm
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interface is intended to be used on routers, not on hosts.
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.\"
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@ -126,5 +125,5 @@ interface is intended to be used on routers, not on hosts.
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.%D June 2001
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.Re
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.Sh HISTORY
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The FAITH IPv6-to-IPv4 TCP relay translator was first appeared in
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The FAITH IPv6-to-IPv4 TCP relay translator first appeared in the
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WIDE hydrangea IPv6 stack.
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