Re: controlling open sessions

[Russ Combs <rcombs () sourcefire com>]

On Fri, Jan 7, 2011 at 12:37 PM, Lawrence R. Hughes, Sr. <
lhughes () safemedia com> wrote:

>  Hi,
>
> We have too many open sessions for 2.8.6.1, is there a way to controll them
> via snort.conf?

Can you clarify what you mean by open sessions and how you might control
them?

Is it so many that Snort is pruning sessions or is the issue that you have
hosts running out of ports or what?


> Here is a snippet of our stream5 config (notice the aggressive pruning we
> are doing):
>
>
> # Target-Based stateful inspection/stream reassembly. For more inforation,
> see README.stream5
>
> preprocessor stream5_global: memcap 1073741824, max_tcp 1048576, track_tcp
> yes, max_udp 131072, track_udp yes, track_icmp no, flush_on_alert yes
>
> preprocessor stream5_tcp: policy linux, use_static_footprint_sizes,
> max_queued_bytes 4194304, max_queued_segs 5242, \
>
> # overlap_limit 4, small_segments 3 bytes 150, \
>
> timeout 30, dont_store_large_packets, dont_reassemble_async, require_3whs
> 5, \
>
> 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 6665 6666 6667 6668 6669 \
>
> 7000 32770 32771 32772 32773 32774 32775 32776 32777 32778 32779, \
>
> ports both 80 311 443 465 563 591 593 636 901 989 992 993 994 995 1220 1414
> 2301 2381 2809 3128 3702 6907 7702 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 8028 8080 8118 8123 8180 8243 8280 8888 9443
> 9999 11371
>
> preprocessor stream5_udp: timeout 30
>
> Thanks,
>
> Larry
>
>
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that requires sensitive data to be transmitted over the Web.   Learn how to 
best implement a security strategy that keeps consumers' information secure 
and instills the confidence they need to proceed with transactions.
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