Snort mailing list archives
rule explanation
From: Sharif Uddin <Sharif.Uddin () spectrumasa com>
Date: Tue, 9 Sep 2014 09:35:09 +0000
Hello I am trying to understand these rules, is there a page where it describes each and every rule? If I google the rule I don't get any explanation of the rule other than suppress or disable them? I have so far suppressed the following which has reduced the alerts a lot. #(http_inspect) SIMPLE REQUEST suppress gen_id 119, sig_id 32, track by_src, ip $HOME_NET #(http_inspect) UNKNOWN METHOD suppress gen_id 119, sig_id 31, track by_src, ip $HOME_NET #(http_inspect) INVALID CONTENT-LENGTH OR CHUNK SIZE suppress gen_id 120, sig_id 8, track by_src, ip $HOME_NET #(http_inspect) NO CONTENT-LENGTH OR TRANSFER-ENCODING IN HTTP RESPONSE suppress gen_id 120, sig_id 3, track by_src, ip $HOME_NET #(http_inspect) DOUBLE DECODING ATTACK suppress gen_id 119, sig_id 2, track by_src, ip $HOME_NET #(http_inspect) HTTP RESPONSE GZIP DECOMPRESSION FAILED suppress gen_id 120, sig_id 6, track by_src, ip $HOME_NET #(http_inspect) IIS UNICODE CODEPOINT ENCODING suppress gen_id 119, sig_id 7, track by_src, ip $HOME_NET #(http_inspect) BARE BYTE UNICODE ENCODING suppress gen_id 119, sig_id 4, track by_src, ip $HOME_NET #(http_inspect) JAVASCRIPT OBFUSCATION LEVELS EXCEEDS 1 suppress gen_id 120, sig_id 9, track by_src, ip $HOME_NET #(http_inspect) JAVASCRIPT WHITESPACES EXCEEDS MAX ALLOWED suppress gen_id 120, sig_id 10, track by_src, ip $HOME_NET #(http_inspect) UNESCAPED SPACE IN HTTP URI suppress gen_id 119, sig_id 33, track by_src, ip $HOME_NET #(http_inspect) U ENCODING suppress gen_id 119, sig_id 3, track by_src, ip $HOME_NET #stream5: Reset outside window suppress gen_id 129, sig_id 15, track by_src, ip $HOME_NET #suppress gen_id 129, sig_id 15, track by_dst, ip 10.20.30.40/29 #stream5: Bad segment, overlap adjusted size less than/equal 0 suppress gen_id 129, sig_id 5, track by_src, ip $HOME_NET #suppress gen_id 129, sig_id 5, track by_dst, ip 10.20.30.40/29 Now I get average 34 alerts per hour and would like to know some explanations regarding them. See screenshot. [cid:image001.png@01CFCC19.B9193780] Sharif Uddin Development/Support Engineer ------------------- Spectrum Geo Ltd Dukes Court, Duke Street Woking, Surrey GU21 5BH UNITED KINGDOM Tel: +44 (0) 1483 730201 Fax: +44 (0) 1483 762620 www.spectrumasa.com<http://www.spectrumasa.com/> IMPORTANT - This message and any attached files contain information intended for the exclusive use of the party or parties to whom it is addressed and may contain information that is proprietary, privileged, confidential and/or exempt from disclosure under applicable law. If you are not an intended recipient, you are hereby notified that any viewing, copying, disclosure or distribution of this information may be subject to legal restriction or sanction. Please notify the sender immediately and delete the original message without making any copies. Copyright in this email and any attachments belong to Spectrum Geo Limited. We cannot guarantee the security or confidentiality of email communications. We do not accept any liability for losses or damages that you may suffer as a result of your receipt of this email. Email communication with Spectrum Geo Ltd., may be monitored as permitted by UK legislation. Spectrum Geo Limited, is a limited company registered in England and Wales. Registered number: 1979422. Registered office: 95 Aldwych, London WC2B 4JF.
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