D.O.S- Attack On Named

Aug 29, 2007

Well the last week my server has experimenting a big load on some hours of the day and every deay ....

all looks goods , few TIME_WAIT packages , few conections per ip , few process of httpd ....

when I check with a: tail -f /var/log/messages appears a lot of this lines

Aug 29 17:28:49 server kernel: Firewall: *UDP_IN Blocked* IN=eth1 OUT= MAC=ff:ff:ff:ff:ff:ff:00:11:2f:87:27:83:08:00 SRC=190.8.82.204 DST=255.255.255.255 LEN=75 TOS=0x00 PREC=0x00 TTL=128 ID=27592 PROTO=UDP SPT=8782 DPT=9777 LEN=55
Aug 29 17:28:54 server kernel: printk: 33 messages suppressed.
Aug 29 17:28:55 server kernel: Neighbour table overflow.
Aug 29 17:28:58 server last message repeated 3 times
Aug 29 17:29:23 server named[1949]: client 209.244.7.40#5302: error sending response: not enough free resources
Aug 29 17:29:27 server last message repeated 2 times
Aug 29 17:29:24 server kernel: Neighbour table overflow.
Aug 29 17:29:29 server named[1949]: client 209.244.7.40#5302: error sending response: not enough free resources
Aug 29 17:29:31 server named[1949]: client 209.244.7.40#5302: error sending response: not enough free resources
Aug 29 17:29:34 server kernel: Neighbour table overflow.
Aug 29 17:29:35 server last message repeated 3 times
Aug 29 17:29:35 server named[1949]: client 200.225.157.203#32841: error sending response: not enough free resources
Aug 29 17:29:35 server kernel: Neighbour table overflow.
Aug 29 17:29:35 server named[1949]: client 200.225.157.203#32841: error sending response: not enough free resources
Aug 29 17:29:36 server kernel: Neighbour table overflow.
Aug 29 17:29:36 server named[1949]: client 200.225.157.203#32841: error sending response: not enough free resources
Aug 29 17:29:36 server kernel: Neighbour table overflow.
Aug 29 17:29:36 server named[1949]: client 200.225.157.203#32841: error sending response: not enough free resources

this could be an atack? because appears a lot of differents ip and they try to access in differnts ports..

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Oct 26, 2009

After upcp suddently named failed and only works when I use /scripts/ulimitnamed

But now the server feel so slow because of became named-wrapper -u

How to revert back from named-wrapper -u named to /usr/sbin/named -u named?

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Nov 25, 2008

I see some errors about lame servers in messages log,and i noticed that look like adress of isp surfer domain beacuse i noticed domain of my isp listed also as lame name server.Here is example:

Nov 24 03:46:55 available9 named[7562]: lame server resolving '247.100.51.72.in-addr.arpa' (in '100.51.72.in-addr.arpa'?): 205.214.192.202#53
Nov 24 03:46:55 available9 named[7562]: lame server resolving '247.100.51.72.in-addr.arpa' (in '100.51.72.in-addr.arpa'?): 205.214.192.201#53
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Nov 24 03:46:56 available9 named[7562]: lame server resolving '247.100.51.72.in-addr.arpa' (in '100.51.72.in-addr.arpa'?): 205.214.192.201#53
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Nov 24 07:19:52 available9 named[7562]: FORMERR resolving 'host2.experienceexcept.com/AAAA/IN': 91.208.228.150#53
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Nov 24 07:19:52 available9 named[7562]: FORMERR resolving 'host1.experienceexcept.com/AAAA/IN': 91.208.228.150#53
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Mar 2, 2008

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i made that

DNS Functions
Adding an A entry for your hostname
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DNS Functions
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Oct 12, 2009

It has been a long time since I setup named, and I need some help as I'm just not getting it this time around. I'm running named on CentOS under Chroot

IP Space is; 216.201.80.96/28
Gateway is 216.201.80.97
Netmask is 255.255.255.240
Useable IP Space is 216.201.80.100 - 110

named.conf
---
key "rndckey" {
algorithm hmac-md5;
// secret is xx'ed out for this posting
secret "xxxxxxxxxxxxxx";
};

controls {
inet 127.0.0.1 allow { 127.0.0.1; } keys { "rndckey"; };
inet 216.201.80.101 allow { 216.201.80.101; } keys { "rndckey"; };
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options {
directory "/var/named";
pid-file "/var/run/named/named.pid";

recursion yes;

allow-recursion {
127.0.0.1;
216.201.80.101;
};
listen-on {
127.0.0.1;
216.201.80.101;
};
query-source address * port 53;

version "REFUSED";

allow-query {
127.0.0.1;
216.201.80.101;
};
};

server 216.201.80.101 {
keys { rndckey; };
};

zone "." IN {
type hint;
file "named.ca";
};

zone "cheapdatamining.com" IN {
type master;
file "data/cheapdatamining.com.zone";
allow-update { none; };
};

cheapdatamining.com.zone
--------------------------
$TTL 38400
@ IN SOA ns1.cheapdatamining.com. admin.cheapdatamining.com (
2008090335 ; Serial
10800 ; Refresh after 3 hours
3600 ; Retry after 1 hour
604800 ; Expire after 1 week
86400 ) ; Minimum TTL 1 day

cheapdatamining.com.INNS ns1.cheapdatamining.com.
cheapdatamining.com.INNSns2.cheapdatamining.com.
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ns2.cheapdatamining.com. IN A 216.201.80.102

resolv.conf on server.
--------------
search cheapdatamining.com
nameserver 216.201.80.101
nameserver 216.201.80.102

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Is this the correct setup?

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#

# ls /var/lock/subsys | grep named
#

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Starting named:
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[FAILED]
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Code:
root@saturn [~]# grep named /var/log/messages | tail -10
Apr 1 17:10:16 saturn named: failed
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Apr 1 17:14:28 saturn named: failed
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Aug 11, 2007

waht the solution to this problem?

[root@server etc]# service named restart
Stopping named: [FAILED]
Starting named:
Error in named configuration:
zone localdomain/IN: loaded serial 42
zone localhost/IN: loaded serial 42
zone 0.0.127.in-addr.arpa/IN: loaded serial 1997022700
zone 0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa/IN:
loaded serial 1997022700
zone 255.in-addr.arpa/IN: loaded serial 42
zone 0.in-addr.arpa/IN: loaded serial 42
zone server.mojaty4host.com/IN: loaded serial 2007070601
zone agr7.org/IN: loaded serial 2007070701
zone ahha1.com/IN: loaded serial 2007070701
zone i-artt.com/IN: loaded serial 2007070701
zone egyeye.com/IN: loaded serial 2007070701
zone mojaty.net/IN: loaded serial 2007070701
zone mgirlseduepmatir.com/IN: loaded serial 2007070701
zone mojaty.com/IN: loaded serial 2007070701
zone mojaty4host.com/IN: loaded serial 2007072800
zone omrnajd.com/IN: loaded serial 2007070701
zone sakervb.net/IN: loaded serial 2007070701
zone 5thdth.com/IN: loaded serial 2007070701
zone x454x.com/IN: loaded serial 2007070701
zone z5555z.com/IN: loaded serial 2007070701
zone domains.mojaty4host.com/IN: loaded serial 2007070801
zone server.mojaty4host.com.zz/IN: loaded serial 2007070801
zone voodafone.org/IN: loaded serial 2007071001
zone njoomcam.com/IN: loaded serial 2007071201
zone cokedown4host.com/IN: loaded serial 2007071301
zone q84cam.com/IN: loaded serial 2007071501
zone golden4web.com/IN: loaded serial 2007071501
zone tsmymat.com/IN: loaded serial 2007071601
zone chat.mojaty4host.com/IN: loaded serial 2007072501
zone reemando.com/IN: loaded serial 2007071701
zone khaleejstudent.com/IN: loaded serial 2007071701
zone amwaj3.com/IN: loaded serial 2007071701
zone academy-love.com/IN: loaded serial 2007071801
zone alrsamhost.net/IN: loaded serial 2007071801
zone new-lock.com/IN: loaded serial 2007071801
zone yutmah.com/IN: loaded serial 2007071801
zone ksa-stars.com/IN: loaded serial 2007071801
zone gold4shop.com/IN: loaded serial 2007071901
zone xhamsx.com/IN: loaded serial 2007071901
zone ithadyfans.com/IN: loaded serial 2007071901
zone banat-alriffa3.com/IN: loaded serial 2007071901
zone kingawy.net/IN: loaded serial 2007072201
zone ateaf-host.com/IN: loaded serial 2007072401
zone ns1.dr-nokia4host.com/IN: loaded serial 2007072301
zone ns2.dr-nokia4host.com/IN: loaded serial 2007072301
zone dr-nokia.org/IN: loaded serial 2007072501
zone k0s0a.com/IN: loaded serial 2007072701
zone hiarab4ever.net/IN: loaded serial 2007072801
zone ayam7.com/IN: loaded serial 2007072901
zone gulf-pixel.com/IN: loaded serial 2007080900
zone sa-club.com/IN: loaded serial 2007073101
zone sharjah1.org/IN: loaded serial 2007080201
zone al-doseri.net/IN: loaded serial 2007080301
zone alnouami.com/IN: loaded serial 2007080301
zone sharjah1.com/IN: loaded serial 2007080301
zone shababz.com/IN: loaded serial 2007080301
zone ahat-naif.com/IN: loaded serial 2007080501
zone al5yaal.net/IN: loaded serial 2007080508
zone cssarabia.com/IN: loaded serial 2007080501
zone hashlangroup.com/IN: loaded serial 2007080501
zone hot-w-groub.com/IN: loaded serial 2007080501
zone sa1tan.com/IN: loaded serial 2007080502
zone takinty.com/IN: loaded serial 2007080501
zone uaeksa.com/IN: loaded serial 2007080501
zone web2.mojaty4host.com/IN: loaded serial 2007080501
zone web3.mojaty4host.com/IN: loaded serial 2007080501
zone web4.mojaty4host.com/IN: loaded serial 2007080501
zone llwowll.com/IN: loaded serial 2007080601
zone ea4net.com/IN: loaded serial 2007080901
zone backup.com/IN: loaded serial 2007080901
zone 2qq7.com/IN: loaded serial 2007080901
zone 3kalam.net/IN: loaded serial 2007080901
zone 7laksa.net/IN: loaded serial 2007080901
zone 9habab.com/IN: loaded serial 2007080901
zone al-hidyaway.com/IN: loaded serial 2007080901
zone alkharjxp.com/IN: loaded serial 2007080901
zone alraass.com/IN: loaded serial 2007080901
zone alslbokhi.com/IN: loaded serial 2007080901
zone anamluae.com/IN: loaded serial 2007080901
zone b3z3.com/IN: loaded serial 2007080901
zone r3boob.net/IN: loaded serial 2007080901
zone banatcrazy.com/IN: loaded serial 2007080901
zone d3eenn.com/IN: loaded serial 2007080901
dns_master_load: /var/named/domoo3-7a2era.com.db:7: unexpected end of line
dns_master_load: /var/named/domoo3-7a2era.com.db:6: unexpected end of input
dns_master_load: /var/named/domoo3-7a2era.com.db:9: unexpected end of line
dns_master_load: /var/named/domoo3-7a2era.com.db:8: unexpected end of input
dns_master_load: /var/named/domoo3-7a2era.com.db:10: isc_lex_gettoken() failed:
unbalanced parentheses
dns_master_load: /var/named/domoo3-7a2era.com.db:10: unbalanced parentheses
zone domoo3-7a2era.com/IN: loading master file /var/named/domoo3-7a2era.com.db:
unexpected end of input
_default/domoo3-7a2era.com/IN: unexpected end of input
zone emprie-romance.com/IN: loaded serial 2007080901
zone essa-alharthy.com/IN: loaded serial 2007080901
zone fnon2.com/IN: loaded serial 2007080901
zone gahrr.com/IN: loaded serial 2007080901
zone hamsat14.com/IN: loaded serial 2007080901
zone hilali-fans.net/IN: loaded serial 2007080901
zone imam-shafie.com/IN: loaded serial 2007080901
zone jameiah.com/IN: loaded serial 2007080901
zone juvepersempre.com/IN: loaded serial 2007080901
zone l1n1.net/IN: loaded serial 2007080901
zone mjnonha.com/IN: loaded serial 2007080901
zone m-al7lween.com/IN: loaded serial 2007080901
zone qalak.com/IN: loaded serial 2007080901
zone qloob30.com/IN: loaded serial 2007080901
zone quraishat.com/IN: loaded serial 2007080901
zone raayse.com/IN: loaded serial 2007080901
zone romance-empire.com/IN: loaded serial 2007080901
zone roo7oman.com/IN: loaded serial 2007080901
zone rooo3h.net/IN: loaded serial 2007080901
zone roz-nada.com/IN: loaded serial 2007080901
zone seafx.com/IN: loaded serial 2007080901
zone shaagran.net/IN: loaded serial 2007080901
zone shwg.net/IN: loaded serial 2007080901
zone sqalb.com/IN: loaded serial 2007080901
zone stars6.com/IN: loaded serial 2007080901
zone v1111v.com/IN: loaded serial 2007080901
zone w998w.com/IN: loaded serial 2007080901
zone zkirt.com/IN: loaded serial 2007080901
zone a88888a.mojaty4host.com/IN: loaded serial 2007081001
zone acefhost.com/IN: loaded serial 2007081001
zone trtshly.com/IN: loaded serial 2007081001
zone n1n9.com/IN: loaded serial 2007062602
zone ya-gro7i.com/IN: loaded serial 2007081003
zone q-almjroh.com/IN: loaded serial 2007081001
zone u88p.com/IN: loaded serial 2007081001
zone dnadesh.net/IN: loaded serial 2007081001
zone 3atr.net/IN: loaded serial 2007081101
zone acefalmhrh.biz/IN: loaded serial 2007081101
zone al-trf.net/IN: loaded serial 2007081101
zone fn-fn.com/IN: loaded serial 2007081101
zone dl8l.com/IN: loaded serial 2007081101
zone sport-fifa.com/IN: loaded serial 2007081101
zone laamst.com/IN: loaded serial 2007081101
zone 3malka.com/IN: loaded serial 2007081101
zone acefalmhrh.net/IN: loaded serial 2007081101
zone aryweb.com/IN: loaded serial 2007081101
zone b77w.com/IN: loaded serial 2007081101
zone 500100100.net/IN: loaded serial 2007081101
zone soly-vb.com/IN: loaded serial 2007081101
zone rap-boyz.net/IN: loaded serial 2007081101
zone 3rb-islam.com/IN: loaded serial 2007081101
zone roz-vip.com/IN: loaded serial 2007081101
zone tknlujia-serv.com/IN: loaded serial 2007081101
zone gr7gr7.com/IN: loaded serial 2007081101
zone h-bnat.com/IN: loaded serial 2007081101
zone 2wgat.com/IN: loaded serial 2007081101
zone al5aleej.net/IN: loaded serial 2007081101
zone ala7asees.com/IN: loaded serial 2007081101
zone k7chat.com/IN: loaded serial 2007081101
zone 3albaal.com/IN: loaded serial 2007081101
zone alyakota.com/IN: loaded serial 2007081101
zone lootss.net/IN: loaded serial 2007081101
zone acef-des.com/IN: loaded serial 2007081101
zone almosabqat.com/IN: loaded serial 2007081101
zone hacker4ever.net/IN: loaded serial 2007081101
zone muza1.com/IN: loaded serial 2007081101
[FAILED]
[root@server etc]#

What is the solution to this problem

Tried where many do not benefit you to contact technical support cpanel

There can be no support slow unfortunately

I hope you benefit in solving this problem

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Code:
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192 processes: 185 sleeping, 7 running, 0 zombie, 0 stopped
CPU states: cpu user nice system irq softirq iowait idle
total 4.3% 0.0% 5.0% 0.3% 0.0% 89.2% 0.9%
cpu00 4.8% 0.0% 4.8% 0.0% 0.1% 89.3% 0.8%
cpu01 3.9% 0.0% 5.2% 0.7% 0.0% 89.0% 1.0%
Mem: 1023624k av, 966688k used, 56936k free, 0k shrd, 119500k buff
658244k actv, 130464k in_d, 16084k in_c
Swap: 1052248k av, 72096k used, 980152k free 496268k cached

PID USER PRI NI SIZE RSS SHARE STAT %CPU %MEM TIME CPU COMMAND
15 root 15 0 0 0 0 SW 0.8 0.0 2:23 1 kjournald
9182 named 15 0 3504 3504 2184 S 0.6 0.3 0:01 0 named
8301 apache 15 0 14564 11M 6832 S 0.5 1.1 0:00 0 httpd
1043 qmails 24 0 1196 1064 384 R 0.4 0.1 1:10 0 qmail-send
1047 qmailr 25 0 372 364 280 S 0.3 0.0 0:35 1 qmail-rspawn
30825 root 15 0 1140 1088 744 R 0.2 0.1 0:09 1 top
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7076 apache 15 0 13868 11M 6820 S 0.2 1.1 0:00 1 httpd
759 root 15 0 568 548 488 R 0.1 0.0 1:30 1 syslogd

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Starting named:
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zone netitsolution.com/IN: loaded serial 42
zone 8.168.192.in-addr.arpa/IN: has no NS records
localhost_resolver/8.168.192.in-addr.arpa/IN: bad zone
zone localdomain/IN: loaded serial 42
zone localhost/IN: loaded serial 42
zone 0.0.127.in-addr.arpa/IN: loaded serial 1997022700
zone 0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa/IN: loaded serial 1997022700
zone 255.in-addr.arpa/IN: loaded serial 42
zone 0.in-addr.arpa/IN: loaded serial 42

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Jun 30, 2007

Few days back i began to have problem with server overload, when i checked in /var/log/messages i found a lot of

Jun 28 14:17:59 secure named[3523]: client 200.48.225.146#59035: error sending response: host unreachable
Jun 28 14:17:59 secure named[3523]: client 200.51.211.5#32774: error sending response: host unreachable
Jun 28 14:17:59 secure named[3523]: client 202.55.145.3#32637: error sending response: host unreachable
Jun 28 14:17:59 secure named[3523]: client 66.245.177.163#3936: error sending response: host unreachable
Jun 28 14:17:59 secure named[3523]: client 202.59.163.2#32768: error sending response: host unreachable
Jun 28 14:17:59 secure named[3523]: client 216.247.37.56#24990: error sending response: host unreachable
Jun 28 14:17:59 secure named[3523]: client 194.18.168.184#39718: error sending response: host unreachable
Jun 28 14:17:59 secure named[3523]: client 64.226.28.70#45706: error sending response: host unreachable

all at the same hour,minutes and seconds, this that i wrote is an example (the ip's are reals) but like it i found a lot of more, and is in the same time that the server overload. the server is RHE and i have APF and BFA installed.

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Jun 21, 2007

last night i was looking for closing my Open DNS to close it ...

but it's seems that i keep playing in the file name
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but when i finish i didn't cp /named.conf

i type mv named.conf-back /etc/named.conf

and all my server now is down and the support sooo bad ...

they just told me some commands and it's didn't work

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Feb 17, 2007

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Waiting for named to restart.... . . . . . . . . . . finished.

named status named has failed, please contact the sysadmin (result was "named is not running"). Feb 17 15:01:40 bunny named: failed Feb 17 15:01:40 bunny named[10682]: starting BIND 9.2.4 -u named Feb 17 15:01:40 bunny named[10682]: using 2 CPUs Feb 17 15:01:40 bunny named[10682]: loading configuration from '/etc/named.conf' Feb 17 15:01:40 bunny named[10682]: listening on IPv4 interface lo, 127.0.0.1#53 Feb 17 15:01:40 bunny named[10682]: listening on IPv4 interface eth0, XX.XXX.XX.XXX#53 Feb 17 15:01:40 bunny named[10682]: listening on IPv4 interface eth0:0, XX.XXX.XX.XXX#53 Feb 17 15:01:40 bunny named[10682]: listening on IPv4 interface eth0:1, XX.XXX.XX.XXX#53 Feb 17 15:01:40 bunny named[10682]: listening on IPv4 interface eth0:2, XX.XXX.XX.XXX#53 Feb 17 15:01:40 bunny named[10682]: listening on IPv4 interface eth0:3, XX.XXX.XX.XXX#53 Feb 17 15:01:40 bunny named[10682]: /etc/rndc.key:1: configuring key 'rndc-key': bad base64 encoding Feb 17 15:01:40 bunny named[10682]: loading configuration: bad base64 encoding Feb 17 15:01:40 bunny named[10682]: exiting (due to fatal error) Feb 17 15:01:42 bunny named: uruchomienie named failed

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Feb 14, 2007

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Oct 28, 2009

I'd like to add geodns to BIND, so I need to modify named.conf. All that I will put into is a include of an acl file (for different IP ranges), and add a new view for existed domain.

My VPS use cPanel. What is the best way to handle this, as named.conf can be modify by cPanel? I can modify the template in /scripts/rebuilddnsconfig, but I don't know how to add a new view.

There's only one site in my VPS. But I use a few subdomains in DNS (legacy issues). Only one db file in /var/named/

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