Snort mailing list archives
DNS Packets
From: Mikey van der Worp <mvdworp () utelisys com>
Date: Mon, 3 Jun 2013 14:57:45 +0200
Hi there I've got several rules.. But non of them are working properly.. "How to detect a DNS Query Reply -> OK".. This is something i've created a couple of days ago... Doesn't work as it should be.. This detects "all querys".. Even when its refused... Help please! == EXAMPLE == var DNS_SERVERS [192.168.1.1] var HOME_NETWORK [192.168.0.1/24] alert udp $HOME_NETWORK,!$DNS_SERVERS 53 -> !$DNS_SERVERS any (msg: " DNS Query resolved by unknown host."; priority:3; sid:10000000002;) == EXAMPLE == DEBUG DATA === 06/03-14:17:03.732308 50:3D:E5:AF:F1:80 -> 00:00:5E:00:01:50 type:0x800 len:0x149 127.0.0.1:53 -> 145.100.**.**:32559 UDP TTL:63 TOS:0x0 ID:34600 IpLen:20 DgmLen:315 Len: 287 23 EF 81 80 00 01 00 05 00 04 00 04 03 77 77 77 #............www 10 67 6F 6F 67 6C 65 61 64 73 65 72 76 69 63 65 .googleadservice 73 03 63 6F 6D 00 00 01 00 01 C0 0C 00 05 00 01 s.com........... 00 00 00 2B 00 1A 06 70 61 67 65 61 64 01 6C 0B ...+...pagead.l. 64 6F 75 62 6C 65 63 6C 69 63 6B 03 6E 65 74 00 doubleclick.net. C0 36 00 01 00 01 00 00 01 2C 00 04 4A 7D 84 9B .6.......,..J}.. C0 36 00 01 00 01 00 00 01 2C 00 04 4A 7D 84 9A .6.......,..J}.. C0 36 00 01 00 01 00 00 01 2C 00 04 4A 7D 84 9D .6.......,..J}.. C0 36 00 01 00 01 00 00 01 2C 00 04 4A 7D 84 9C .6.......,..J}.. C0 3D 00 02 00 01 00 05 40 13 00 0D 03 6E 73 32 .=......@....ns2 06 67 6F 6F 67 6C 65 C0 21 C0 3D 00 02 00 01 00 .google.!.=..... 05 40 13 00 06 03 6E 73 34 C0 A0 C0 3D 00 02 00 .@....ns4...=... 01 00 05 40 13 00 06 03 6E 73 31 C0 A0 C0 3D 00 ...@....ns1...=. 02 00 01 00 05 40 13 00 06 03 6E 73 33 C0 A0 C0 .....@....ns3... C7 00 01 00 01 00 02 9D 11 00 04 D8 EF 20 0A C0 ............. .. 9C 00 01 00 01 00 02 9D 11 00 04 D8 EF 22 0A C0 .............".. D9 00 01 00 01 00 02 9D 11 00 04 D8 EF 24 0A C0 .............$.. B5 00 01 00 01 00 02 9D 11 00 04 D8 EF 26 0A .............&. Sincerely yours, Mikey
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Current thread:
- DNS Packets Mikey van der Worp (Jun 03)
- Re: DNS Packets Joel Esler (Jun 03)
- Re: DNS Packets Mikey van der Worp (Jun 03)
- Re: DNS Packets Michal Purzynski (Jun 03)
- [SPAM] Re: DNS Packets rmkml (Jun 03)
- Re: [SPAM] Re: DNS Packets Joel Esler (Jun 03)
- Re: [SPAM] Re: DNS Packets waldo kitty (Jun 03)
- [SPAM] Re: DNS Packets rmkml (Jun 03)
- Re: DNS Packets Joel Esler (Jun 03)