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Gleb Smirnoff 2ce85919bb Add net.inet.ip.source_address_validation 
Drop packets arriving from the network that have our source IP
address.  If maliciously crafted they can create evil effects
like an RST exchange between two of our listening TCP ports.
Such packets just can't be legitimate.  Enable the tunable
by default.  Long time due for a modern Internet host.

Reviewed by:		donner, melifaro
Differential revision:	https://reviews.freebsd.org/D32914
2021-11-12 09:00:33 -08:00
.cirrus-ci Cirrus-CI: add some timing info on pkg install failure 2021-08-04 15:02:00 -04:00
.github CI: don't install abigail-tools 2021-09-02 10:02:27 -07:00
bin echo(1): Replace errexit() with err(3) 2021-11-09 22:12:19 +01:00
cddl zfs: merge openzfs/zfs@ec64fdb93 (master) into main 2021-10-21 15:06:06 +02:00
contrib Awk: Add error file 2021-11-06 16:24:36 -06:00
crypto ssh: enable FIDO/U2F keys 2021-11-04 13:01:44 -04:00
etc awk: Move to using two sets of tests 2021-11-05 08:53:36 -06:00
gnu libdialog: Bump shared library version to 10. 2021-10-27 09:30:24 -07:00
include Add sched_getcpu() 2021-11-10 21:18:54 +02:00
kerberos5 pkgbase: Create a FreeBSD-kerberos package 2021-09-07 10:23:14 +02:00
lib x86: provide userspace implementation of sched_getcpu() where possible 2021-11-10 21:18:54 +02:00
libexec rtld: style adjustments 2021-11-06 06:40:18 +02:00
release release: Remove unused variables in azure Makefile 2021-11-04 16:42:38 +08:00
rescue Retire synchronous PPP kernel driver sppp(4). 2021-10-22 11:41:36 -07:00
sbin Fix regression to verbose behavior introduced in 68bff4a07e. 2021-11-11 12:11:25 -08:00
secure ssh: enable FIDO/U2F keys 2021-11-04 13:01:44 -04:00
share Add net.inet.ip.source_address_validation 2021-11-12 09:00:33 -08:00
stand efi(8): Fix a typo in a source code comment 2021-11-07 14:07:24 +01:00
sys Add net.inet.ip.source_address_validation 2021-11-12 09:00:33 -08:00
targets Retire obsolete iscsi_initiator(4) 2021-10-26 16:17:35 -04:00
tests pf tests: Test PR259689 2021-11-10 11:27:22 +01:00
tools stress2: Added two test scenarios for future gunion(8) 2021-11-11 10:11:49 +01:00
usr.bin sockstat(1): Update Synopsis section 2021-11-10 15:22:06 -05:00
usr.sbin wpa: Fix WITHOUT_WPA_SUPPLICANT_EAPOL build 2021-11-11 19:03:05 -08:00
.arcconfig Remove history.immutable from .arcconfig 2021-04-13 12:36:25 +01:00
.arclint arc lint: ignore /tests/ in chmod 2017-12-19 03:38:06 +00:00
.cirrus.yml Cirrus-CI: add a manually triggered arm64 task 2021-09-14 15:12:55 -04:00
.clang-format clang-format: Add bitset loop macros 2021-09-21 12:08:01 -04:00
.gitattributes Add a basic clang-format configuration file 2019-06-07 15:23:52 +00:00
.gitignore gitignore: Add .clangd and .ccls-cache 2021-06-04 16:56:08 +08:00
COPYRIGHT copyrights: Happy New Year 2021 2020-12-31 10:29:44 -05:00
LOCKS LOCKS: update current locks 2018-06-09 03:08:04 +00:00
MAINTAINERS [skip ci] volunteer to maintain POSIX AIO 2021-05-30 17:21:12 -06:00
Makefile Revert "Fix native-xtools build" 2021-08-03 10:00:28 -07:00
Makefile.inc1 Remove arm/linux from sysent toplevel target 2021-11-10 21:18:53 +02:00
Makefile.libcompat ncurses: fix libcompat (lib32 for example) building 2021-10-04 14:16:32 +02:00
Makefile.sys.inc AUTO_OBJ: For all top-level targets enforce using an OBJDIR. 2017-12-05 21:29:47 +00:00
ObsoleteFiles.inc libdialog: Bump shared library version to 10. 2021-10-27 09:30:24 -07:00
README.md Whitespace cleanup 2021-03-12 19:57:58 +08:00
RELNOTES Add notes about vt beeping 2021-11-04 09:15:38 -06:00
UPDATING Add in the commit revision to the UPDATING file for the CC changes 2021-11-11 06:39:20 -05:00

README.md

FreeBSD Source:

This is the top level of the FreeBSD source directory.

FreeBSD is an operating system used to power modern servers, desktops, and embedded platforms. A large community has continually developed it for more than thirty years. Its advanced networking, security, and storage features have made FreeBSD the platform of choice for many of the busiest web sites and most pervasive embedded networking and storage devices.

For copyright information, please see the file COPYRIGHT in this directory. Additional copyright information also exists for some sources in this tree - please see the specific source directories for more information.

The Makefile in this directory supports a number of targets for building components (or all) of the FreeBSD source tree. See build(7), config(8), FreeBSD handbook on building userland, and Handbook for kernels for more information, including setting make(1) variables.

Source Roadmap:

Directory Description
bin System/user commands.
cddl Various commands and libraries under the Common Development and Distribution License.
contrib Packages contributed by 3rd parties.
crypto Cryptography stuff (see crypto/README).
etc Template files for /etc.
gnu Various commands and libraries under the GNU Public License. Please see gnu/COPYING and gnu/COPYING.LIB for more information.
include System include files.
kerberos5 Kerberos5 (Heimdal) package.
lib System libraries.
libexec System daemons.
release Release building Makefile & associated tools.
rescue Build system for statically linked /rescue utilities.
sbin System commands.
secure Cryptographic libraries and commands.
share Shared resources.
stand Boot loader sources.
sys Kernel sources.
sys/arch/conf Kernel configuration files. GENERIC is the configuration used in release builds. NOTES contains documentation of all possible entries.
tests Regression tests which can be run by Kyua. See tests/README for additional information.
tools Utilities for regression testing and miscellaneous tasks.
usr.bin User commands.
usr.sbin System administration commands.

For information on synchronizing your source tree with one or more of the FreeBSD Project's development branches, please see FreeBSD Handbook.