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freebsd-skq/share/man/man4/enc.4

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Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
.\" $OpenBSD: enc.4,v 1.22 2006/05/26 08:51:29 jmc Exp $
.\"
.\" Copyright (c) 1999 Angelos D. Keromytis
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\"
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\" 3. All advertising materials mentioning features or use of this software
.\" must display the following acknowledgement:
.\" This product includes software developed by Angelos D. Keromytis.
.\" 4. The name of the author may not be used to endorse or promote products
.\" derived from this software without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
.\"
.\" $FreeBSD$
.\"
Update man page to reflect latest work on enc(4): - added sysctls to if_enc(4) to control whether the firewalls or bpf will see inner and outer headers or just inner headers for incoming and outgoing IPsec packets. - if_enc work with IPv6 now as well. Reviewed by: brueffer
2007-11-28 22:35:48 +00:00
.Dd November 28, 2007
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
.Dt ENC 4
.Os
.Sh NAME
.Nm enc
.Nd Encapsulating Interface
.Sh SYNOPSIS
- Convert to our new SYNOPSIS style - Correct tcpdump reference
2006-06-27 12:48:15 +00:00
To compile this driver into the kernel,
place the following line in your
kernel configuration file:
.Bd -ragged -offset indent
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
.Cd "device enc"
- Convert to our new SYNOPSIS style - Correct tcpdump reference
2006-06-27 12:48:15 +00:00
.Ed
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
.Sh DESCRIPTION
The
.Nm
interface is a software loopback mechanism that allows hosts or
firewalls to filter
Remove the last entries to fast_ipsec. Merge in parts of the old fast_ipsec.4 man page to ipsec.4 and start updating ipsec.4 man page. Reviewed by: brueffer, sam (slightly earlier versions), bmah Approved by: re (bmah)
2007-08-02 08:04:48 +00:00
.Xr ipsec 4
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
traffic using any firewall package that hooks in via the
.Xr pfil 9
framework.
.Pp
The
.Nm
Update man page to reflect latest work on enc(4): - added sysctls to if_enc(4) to control whether the firewalls or bpf will see inner and outer headers or just inner headers for incoming and outgoing IPsec packets. - if_enc work with IPv6 now as well. Reviewed by: brueffer
2007-11-28 22:35:48 +00:00
interface allows an administrator to see incoming and outgoing packets
before and after they will be or have been processed by
.Xr ipsec 4
via
Correct references to tcpdump(1). PR: 108980 Submitted by: Yonatan
2007-02-09 20:39:14 +00:00
.Xr tcpdump 1 .
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
.Pp
The
Revise markup.
2006-09-30 15:14:49 +00:00
.Dq Li enc0
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
interface inherits all IPsec traffic.
Thus all IPsec traffic can be filtered based on
Revise markup.
2006-09-30 15:14:49 +00:00
.Dq Li enc0 ,
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
and all IPsec traffic could be seen by invoking
Correct references to tcpdump(1). PR: 108980 Submitted by: Yonatan
2007-02-09 20:39:14 +00:00
.Xr tcpdump 1
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
on the
Revise markup.
2006-09-30 15:14:49 +00:00
.Dq Li enc0
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
interface.
Update man page to reflect latest work on enc(4): - added sysctls to if_enc(4) to control whether the firewalls or bpf will see inner and outer headers or just inner headers for incoming and outgoing IPsec packets. - if_enc work with IPv6 now as well. Reviewed by: brueffer
2007-11-28 22:35:48 +00:00
.Pp
What can be seen with
.Xr tcpdump 1
and what will be passed on to the firewalls via the
.Xr pfil 9
framework can be independently controlled using the following
.Xr sysctl 8
variables:
.Bl -column net.enc.out.ipsec_filter_mask 0x00000000 0x00000000
.It Sy "Name Defaults Suggested"
Put parentheses around a few macros to prevent mdoc warnings.
2010-08-16 21:26:47 +00:00
.It "net.enc.out.ipsec_bpf_mask 0x00000003 0x00000001"
.It "net.enc.out.ipsec_filter_mask 0x00000001 0x00000001"
.It "net.enc.in.ipsec_bpf_mask 0x00000001 0x00000002"
.It "net.enc.in.ipsec_filter_mask 0x00000001 0x00000002"
Update man page to reflect latest work on enc(4): - added sysctls to if_enc(4) to control whether the firewalls or bpf will see inner and outer headers or just inner headers for incoming and outgoing IPsec packets. - if_enc work with IPv6 now as well. Reviewed by: brueffer
2007-11-28 22:35:48 +00:00
.El
.Pp
For the incoming path a value of
.Li 0x1
means
.Dq Li before stripping off the outer header
and
.Li 0x2
means
.Dq Li after stripping off the outer header .
For the outgoing path
.Li 0x1
means
.Dq Li with only the inner header
and
.Li 0x2
means
.Dq Li with outer and inner headers .
.Bd -literal
incoming path |------|
---- IPsec processing ---- (before) ---- (after) ----> | |
| Host |
<--- IPsec processing ---- (after) ----- (before) ---- | |
outgoing path |------|
.Ed
.Pp
Most people will want to run with the suggested defaults for
.Cm ipsec_filter_mask
and rely on the security policy database for the outer headers.
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
.Sh EXAMPLES
Update man page to reflect latest work on enc(4): - added sysctls to if_enc(4) to control whether the firewalls or bpf will see inner and outer headers or just inner headers for incoming and outgoing IPsec packets. - if_enc work with IPv6 now as well. Reviewed by: brueffer
2007-11-28 22:35:48 +00:00
To see the packets the processed via
Remove the last entries to fast_ipsec. Merge in parts of the old fast_ipsec.4 man page to ipsec.4 and start updating ipsec.4 man page. Reviewed by: brueffer, sam (slightly earlier versions), bmah Approved by: re (bmah)
2007-08-02 08:04:48 +00:00
.Xr ipsec 4 ,
Update man page to reflect latest work on enc(4): - added sysctls to if_enc(4) to control whether the firewalls or bpf will see inner and outer headers or just inner headers for incoming and outgoing IPsec packets. - if_enc work with IPv6 now as well. Reviewed by: brueffer
2007-11-28 22:35:48 +00:00
adjust the
.Xr sysctl 8
variables according to your need and run:
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
.Pp
Revise markup.
2006-09-30 15:14:49 +00:00
.Dl "tcpdump -i enc0"
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
.Sh SEE ALSO
- Convert to our new SYNOPSIS style - Correct tcpdump reference
2006-06-27 12:48:15 +00:00
.Xr tcpdump 1 ,
Add a pseudo interface for packet filtering IPSec connections before or after encryption. There are two functions, a bpf tap which has a basic header with the SPI number which our current tcpdump knows how to display, and handoff to pfil(9) for packet filtering. Obtained from: OpenBSD Based on: kern/94829 No objections: arch, net MFC after: 1 month
2006-06-26 22:30:08 +00:00
.Xr bpf 4 ,
.Xr ipf 4 ,
.Xr ipfw 4 ,
Remove the last entries to fast_ipsec. Merge in parts of the old fast_ipsec.4 man page to ipsec.4 and start updating ipsec.4 man page. Reviewed by: brueffer, sam (slightly earlier versions), bmah Approved by: re (bmah)
2007-08-02 08:04:48 +00:00
.Xr ipsec 4 ,
.Xr pf 4 ,
.Xr tcpdump 8
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