[Snort-users] [snort-user] rule unable to detect port specific DoS attack

Mayur Patil ram.nath241089 at ...11827...
Tue Sep 3 14:15:06 EDT 2013


Hello Joel Sir,

   After googling I got that this attack TCP based.

  Seeking for guidance,

  Thanks!!



On Tue, Sep 3, 2013 at 8:48 PM, Mayur Patil <ram.nath241089 at ...11827...>wrote:

> P.S. I forgot to add --flood within attack command.
>
>
> On Tue, Sep 3, 2013 at 8:48 PM, Mayur Patil <ram.nath241089 at ...11827...>wrote:
>
>> Hello Joel Sir,
>>
>>      attack is from command line and Command is
>>
>>      [root at ...16515...]# hping3 --rand-source <ip> -p 514 -S -L 0
>>
>>     from hping.org site,
>>
>> It supports TCP, UDP, ICMP and RAW-IP protocols
>>>
>>
>>    so I am confused between it .
>>
>>     Please guide me where I am mistaken !
>> *
>> --
>> *
>> *Cheers,
>> *
>> *Mayur*
>>
>> On Tue, Sep 3, 2013 at 8:41 PM, Joel Esler <jesler at ...1935...> wrote:
>>
>>> On Sep 3, 2013, at 1:44 AM, Mayur Patil <ram.nath241089 at ...11827...>
>>> wrote:
>>>
>>> Hello All,  I have used rule
>>>
>>>  alert tcp any any -> $HOME_NET 514 (msg:"DOS flood denial of service
>>>  attempt";flow:to_server; detection_filter:track by_dst, count 50,
>>> seconds 1;
>>>  metadata:service syslog; classtype:attempted-dos; sid:25101; rev:1;)
>>>
>>>
>>>   which generates alert for at random ports which are not on my
>>> lists..fine
>>>
>>>    But if I write port-specific it does not logging into alert file
>>>    alert tcp [192.168.21.1,192.168.21.2] any -> $HOME_NET 514 (msg:"DOS
>>>   flood denial of service attempt";flow:to_server;
>>> detection_filter:track by_dst,
>>>   count 50, seconds 1; metadata:service syslog;
>>> classtype:attempted-dos;
>>>   sid:25101; rev:1;)
>>>
>>>
>>>   what I done is as follows:
>>>
>>>   I am attaching here the output of pcap file generated by wireshark.
>>>
>>>      1. I run snort in NIDS mode
>>>
>>>          snort -c /etc/snort/snort.conf -l /var/log/snort
>>>
>>>      2. Then I start capture of packets on eth0 interface.
>>>
>>>      3. I perform DoS flood attack output of which generated I am
>>> attaching here
>>>
>>>          http://fpaste.org/36432/
>>>
>>>      Seeking for guidance,
>>>
>>>      Please help,
>>>
>>>      Thanks!!
>>>
>>>
>>>
>>> Is the traffic TCP or UDP?
>>>
>>> --
>>> *Joel Esler*
>>> Senior Research Engineer, VRT
>>> OpenSource Community Manager
>>> Sourcefire
>>>
>>
>>
>>
>> --
>> *Yours Sincerely,
>> Mayur* S. Patil,
>> ME COMP ENGG,
>> MITCOE,
>> Pune.
>>
>> Contact :
>> * * <https://www.facebook.com/mayurram>  <https://twitter.com/RamMayur>
>> <https://plus.google.com/u/0/107426396312814346345/about>
>> <http://in.linkedin.com/pub/mayur-patil/35/154/b8b/>
>> <http://stackoverflow.com/users/1528044/rammayur> *
>> <https://myspace.com/mayurram>* <https://github.com/ramlaxman>
>>
>>
>>
>>
>
>
> --
> *Yours Sincerely,
> Mayur* S. Patil,
> ME COMP ENGG,
> MITCOE,
> Pune.
>
> Contact :
> * * <https://www.facebook.com/mayurram>  <https://twitter.com/RamMayur>
> <https://plus.google.com/u/0/107426396312814346345/about>
> <http://in.linkedin.com/pub/mayur-patil/35/154/b8b/>
> <http://stackoverflow.com/users/1528044/rammayur> *
> <https://myspace.com/mayurram>* <https://github.com/ramlaxman>
>
>
>
>


-- 
*Yours Sincerely,
Mayur* S. Patil,
ME COMP ENGG,
MITCOE,
Pune.

Contact :
* * <https://www.facebook.com/mayurram>  <https://twitter.com/RamMayur>
<https://plus.google.com/u/0/107426396312814346345/about>
<http://in.linkedin.com/pub/mayur-patil/35/154/b8b/>
<http://stackoverflow.com/users/1528044/rammayur> *
<https://myspace.com/mayurram>* <https://github.com/ramlaxman>
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