- Do not claim that ipfw is the only firewall package available
in FreeBSD. Approved by: trhodes (mentor), keramida (mentor)
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2020-12-20 02:59:44 +00:00
svn path=/head/; revision=165721
@ -12,7 +12,7 @@
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.\"
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.\"
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.\" $FreeBSD$
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.Dd August 17, 1999
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.Dd January 1, 2007
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.Dt BLACKHOLE 4
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.Os
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.Sh NAME
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@ -58,12 +58,11 @@ It could potentially also slow down someone who is attempting a denial
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of service attack.
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.Sh WARNING
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The TCP and UDP blackhole features should not be regarded as a replacement
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for
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.Xr ipfw 8
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as a tool for firewalling a system.
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In order to create a highly secure system,
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.Xr ipfw 8
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should be used for protection, not the blackhole feature.
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for firewall solutions.
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Better security would consist of the
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.Nm
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.Xr sysctl 8
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MIB used in conjuction with one of the available firewall packages.
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.Pp
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This mechanism is not a substitute for securing a system.
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It should be used together with other security mechanisms.
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@ -71,7 +70,9 @@ It should be used together with other security mechanisms.
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.Xr ip 4 ,
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.Xr tcp 4 ,
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.Xr udp 4 ,
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.Xr ipf 8 ,
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.Xr ipfw 8 ,
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.Xr pfctl 8 ,
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.Xr sysctl 8
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.Sh HISTORY
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The TCP and UDP
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