ComputerSurge/bind9
3
0
Fork 0
Code Pull Requests 1 Activity

[v9_10] DDoS mitigation features

Browse Source 
3938.	[func]		Added quotas to be used in recursive resolvers
			that are under high query load for names in zones
			whose authoritative servers are nonresponsive or
			are experiencing a denial of service attack.

			- "fetches-per-server" limits the number of
			  simultaneous queries that can be sent to any
			  single authoritative server.  The configured
			  value is a starting point; it is automatically
			  adjusted downward if the server is partially or
			  completely non-responsive. The algorithm used to
			  adjust the quota can be configured via the
			  "fetch-quota-params" option.
			- "fetches-per-zone" limits the number of
			  simultaneous queries that can be sent for names
			  within a single domain.  (Note: Unlike
			  "fetches-per-server", this value is not
			  self-tuning.)
			- New stats counters have been added to count
			  queries spilled due to these quotas.

			These options are not available by default;
			use "configure --enable-fetchlimit" (or
			--enable-developer) to include them in the build.

			See the ARM for details of these options. [RT #37125]
This commit is contained in:
Evan Hunt
2015-07-08 22:55:31 -07:00
parent 4b6accc40b
commit 83d0b1ab69
49 changed files with 2373 additions and 119 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
bin/tests/system/fetchlimit/ns3/named.args Normal file
View File

@@ -0,0 +1,2 @@
# Don't specify '-T clienttest' as it consumes lots of memory with this test
-D ns3 -m record,size,mctx -c named.conf -d 99 -g -U 4

45
bin/tests/system/fetchlimit/ns3/named1.conf Normal file
View File

@@ -0,0 +1,45 @@
/*
* Copyright (C) 2014 Internet Systems Consortium, Inc. ("ISC")
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
controls { /* empty */ };
options {
query-source address 10.53.0.3;
notify-source 10.53.0.3;
transfer-source 10.53.0.3;
port 5300;
directory ".";
pid-file "named.pid";
listen-on { 10.53.0.3; };
listen-on-v6 { none; };
recursion yes;
notify yes;
fetches-per-server 400;
};
key rndc_key {
secret "1234abcd8765";
algorithm hmac-sha256;
};
controls {
inet 10.53.0.3 port 9953 allow { any; } keys { rndc_key; };
};
zone "." {
type hint;
file "root.hint";
};

45
bin/tests/system/fetchlimit/ns3/named2.conf Normal file
View File

@@ -0,0 +1,45 @@
/*
* Copyright (C) 2014 Internet Systems Consortium, Inc. ("ISC")
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
controls { /* empty */ };
options {
query-source address 10.53.0.3;
notify-source 10.53.0.3;
transfer-source 10.53.0.3;
port 5300;
directory ".";
pid-file "named.pid";
listen-on { 10.53.0.3; };
listen-on-v6 { none; };
recursion yes;
notify yes;
fetches-per-zone 40;
};
key rndc_key {
secret "1234abcd8765";
algorithm hmac-sha256;
};
controls {
inet 10.53.0.3 port 9953 allow { any; } keys { rndc_key; };
};
zone "." {
type hint;
file "root.hint";
};

45
bin/tests/system/fetchlimit/ns3/named3.conf Normal file
View File

@@ -0,0 +1,45 @@
/*
* Copyright (C) 2014 Internet Systems Consortium, Inc. ("ISC")
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
controls { /* empty */ };
options {
query-source address 10.53.0.3;
notify-source 10.53.0.3;
transfer-source 10.53.0.3;
port 5300;
directory ".";
pid-file "named.pid";
listen-on { 10.53.0.3; };
listen-on-v6 { none; };
recursion yes;
notify yes;
recursive-clients 400;
};
key rndc_key {
secret "1234abcd8765";
algorithm hmac-sha256;
};
controls {
inet 10.53.0.3 port 9953 allow { any; } keys { rndc_key; };
};
zone "." {
type hint;
file "root.hint";
};

19
bin/tests/system/fetchlimit/ns3/root.hint Normal file
View File

@@ -0,0 +1,19 @@
; Copyright (C) 2014 Internet Systems Consortium, Inc. ("ISC")
;
; Permission to use, copy, modify, and/or distribute this software for any
; purpose with or without fee is hereby granted, provided that the above
; copyright notice and this permission notice appear in all copies.
;
; THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
; REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
; AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
; INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
; LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
; OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
; PERFORMANCE OF THIS SOFTWARE.
; $Id$
$TTL 999999
. IN NS a.root-servers.nil.
a.root-servers.nil. IN A 10.53.0.1