| enc.4 (166608) | enc.4 (171696) |
|---|---|
| 1.\" $OpenBSD: enc.4,v 1.22 2006/05/26 08:51:29 jmc Exp $ 2.\" 3.\" Copyright (c) 1999 Angelos D. Keromytis 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: --- 15 unchanged lines hidden (view full) --- 24.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31.\" | 1.\" $OpenBSD: enc.4,v 1.22 2006/05/26 08:51:29 jmc Exp $ 2.\" 3.\" Copyright (c) 1999 Angelos D. Keromytis 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: --- 15 unchanged lines hidden (view full) --- 24.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31.\" |
| 32.\" $FreeBSD: head/share/man/man4/enc.4 166608 2007-02-09 20:39:14Z brueffer $ | 32.\" $FreeBSD: head/share/man/man4/enc.4 171696 2007-08-02 08:04:48Z bz $ |
| 33.\" | 33.\" |
| 34.Dd June 16, 2006 | 34.Dd August 1, 2007 |
| 35.Dt ENC 4 36.Os 37.Sh NAME 38.Nm enc 39.Nd Encapsulating Interface 40.Sh SYNOPSIS 41To compile this driver into the kernel, 42place the following line in your 43kernel configuration file: 44.Bd -ragged -offset indent 45.Cd "device enc" 46.Ed 47.Sh DESCRIPTION 48The 49.Nm 50interface is a software loopback mechanism that allows hosts or 51firewalls to filter | 35.Dt ENC 4 36.Os 37.Sh NAME 38.Nm enc 39.Nd Encapsulating Interface 40.Sh SYNOPSIS 41To compile this driver into the kernel, 42place the following line in your 43kernel configuration file: 44.Bd -ragged -offset indent 45.Cd "device enc" 46.Ed 47.Sh DESCRIPTION 48The 49.Nm 50interface is a software loopback mechanism that allows hosts or 51firewalls to filter |
| 52.Xr fast_ipsec 4 | 52.Xr ipsec 4 |
| 53traffic using any firewall package that hooks in via the 54.Xr pfil 9 55framework. 56.Pp 57The 58.Nm 59interface allows an administrator 60to see outgoing packets before they have been processed by | 53traffic using any firewall package that hooks in via the 54.Xr pfil 9 55framework. 56.Pp 57The 58.Nm 59interface allows an administrator 60to see outgoing packets before they have been processed by |
| 61.Xr fast_ipsec 4 , | 61.Xr ipsec 4 , |
| 62or incoming packets after they have been similarly processed, via 63.Xr tcpdump 1 . 64.Pp 65The 66.Dq Li enc0 67interface inherits all IPsec traffic. 68Thus all IPsec traffic can be filtered based on 69.Dq Li enc0 , 70and all IPsec traffic could be seen by invoking 71.Xr tcpdump 1 72on the 73.Dq Li enc0 74interface. 75.Sh EXAMPLES 76To see all outgoing packets before they have been processed via | 62or incoming packets after they have been similarly processed, via 63.Xr tcpdump 1 . 64.Pp 65The 66.Dq Li enc0 67interface inherits all IPsec traffic. 68Thus all IPsec traffic can be filtered based on 69.Dq Li enc0 , 70and all IPsec traffic could be seen by invoking 71.Xr tcpdump 1 72on the 73.Dq Li enc0 74interface. 75.Sh EXAMPLES 76To see all outgoing packets before they have been processed via |
| 77.Xr fast_ipsec 4 , | 77.Xr ipsec 4 , |
| 78or all incoming packets after they have been similarly processed: 79.Pp 80.Dl "tcpdump -i enc0" 81.Sh SEE ALSO 82.Xr tcpdump 1 , 83.Xr bpf 4 , | 78or all incoming packets after they have been similarly processed: 79.Pp 80.Dl "tcpdump -i enc0" 81.Sh SEE ALSO 82.Xr tcpdump 1 , 83.Xr bpf 4 , |
| 84.Xr fast_ipsec 4 , | |
| 85.Xr ipf 4 , 86.Xr ipfw 4 , | 84.Xr ipf 4 , 85.Xr ipfw 4 , |
| 87.Xr pf 4 | 86.Xr ipsec 4 , 87.Xr pf 4 , 88.Xr tcpdump 8 |