Re: Snort Stream5 Support

[Joel Esler <jesler () sourcefire com>]

Either call your test.rule from snort.conf with an include statement, or place the contents of your test.rule in the 
bottom of snort.conf

I recommend the first option.

--
Joel Esler
Senior Research Engineer, VRT
OpenSource Community Manager
Sourcefire

On May 22, 2012, at 11:36 AM, Turnbough, Bradley E. wrote:

> Ah…. That would make sense.  So then I can’t consider my rules to be additive to what’s in snort.conf already.  
> Bummer…..
>  
> Any way around that?  I’d rather not place any configs in snort.conf. 
>  
>  
>  
> From: Russ Combs [mailto:rcombs () sourcefire com] 
> Sent: Tuesday, May 22, 2012 10:31 AM
> To: Turnbough, Bradley E.
> Cc: snort-users () lists sourceforge net
> Subject: Re: [Snort-users] Snort Stream5 Support
>  
> Looks like the conf you are telling snort to use is /tmp/test.rule which, per your cat output, does not include the 
> stream5 config, etc.
>
> On Tue, May 22, 2012 at 10:22 AM, Turnbough, Bradley E. <bturnbough () belcan com> wrote:
> Very new to snort.
>  
> I seem to be having some issues with getting Stream5 support up and running.  Here is the rule:
>  
> [root@hostname]# cat /tmp/test.rule
> log tcp any any ->  xx.xx.xx.xx/29 23
> alert tcp any any -> xx.xx.xx.xx/29 22 (\
> msg:"Potential SSH Brute Force";\
> flow:to_server;\
> flags:S;\
> threshold:type threshold, track by_src, count 3, seconds 60;\
> classtype:attempted-dos;\
> sid:2001218;\
> rev:4;\
> resp:rst-all;\
> )
>  
> Using the following options to startup:
>  
> snort -d -i eth0 -c /tmp/test.rule -l /tmp/log
>  
> Produces a nasty error:
>  
> Running in IDS mode
>  
>         --== Initializing Snort ==--
> Initializing Output Plugins!
> Initializing Preprocessors!
> Initializing Plug-ins!
> Parsing Rules file "/tmp/test.rule"
> Tagged Packet Limit: 256
> Log directory = /tmp/log
>  
> +++++++++++++++++++++++++++++++++++++++++++++++++++
> Initializing rule chains...
> ERROR: /tmp/test.rule(11): Stream5 must be enabled to use the 'to_server' option.
> Fatal Error, Quitting..
>  
>  
>  
> Review of the snort.conf file, it appears I DO have Stream5 support enabled:
>  
> preprocessor stream5_global: track_tcp yes, \
>    track_udp yes, \
>    track_icmp no, \
>    max_tcp 262144, \
>    max_udp 131072, \
>    max_active_responses 2, \
>    min_response_seconds 5
> preprocessor stream5_tcp: policy windows, detect_anomalies, require_3whs 180, \
>    overlap_limit 10, small_segments 3 bytes 150, timeout 180, \
>     ports client 21 22 23 25 42 53 79 109 110 111 113 119 135 136 137 139 143 \
>         161 445 513 514 587 593 691 1433 1521 2100 3306 6070 6665 6666 6667 6668 6669 \
>         7000 8181 32770 32771 32772 32773 32774 32775 32776 32777 32778 32779, \
>     ports both 80 81 311 443 465 563 591 593 636 901 989 992 993 994 995 1220 1414 1830 2301 2381 2809 3128 3702 4343 
> 5250 7907 7001 7145 7510 7802 7777 7779 \
>         7801 7900 7901 7902 7903 7904 7905 7906 7908 7909 7910 7911 7912 7913 7914 7915 7916 \
>         7917 7918 7919 7920 8000 8008 8014 8028 8080 8088 8118 8123 8180 8243 8280 8800 8888 8899 9080 9090 9091 9443 
> 9999 11371 55555
> preprocessor stream5_udp: timeout 180
>  
>  
>  
> Why am I getting the error?
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