RE: How do I stop all alerts generated by 'ssp_stre am4'? (snort 1.9.0 )

[Bryce Stenberg <bryce () hrnz co nz>]

Hi Chad,

Thanks for that info.

I don't know how I missed the 'disable_evasion_alerts' when upgrading, and I
never did (and still don't) know what the ttl_limit was about.  But used
them and all running well now. Thanks.

Bryce Stenberg.

> -----Original Message-----
> From: Kreimendahl, Chad J [mailto:Chad.Kreimendahl () umb com]
> Sent: Tuesday, 22 October 2002 3:52 a.m.
> To: Bryce Stenberg; snort-users () lists sourceforge net
> Subject: RE: [Snort-users] How do I stop all alerts generated by
> 'ssp_stream4'? (snort 1.9.0 )
>
>
>
> These two options to stream4 should solve both of those:
>
> disable_evasion_alerts, ttl_limit 0
>
> -----Original Message-----
> From: Bryce Stenberg [mailto:bryce () hrnz co nz] 
> Sent: Sunday, October 20, 2002 4:23 PM
> To: 'snort-users () lists sourceforge net'
> Subject: [Snort-users] How do I stop all alerts generated by
> 'ssp_stream4'? (snort 1.9.0 )
>
>
> Hi All,
>
> I have a problem with my logs filling with unwanted alerts from
> 'spp_stream4'.
> I'm using Snort 1.9.0 on Windows NT4 sp6 servers.
> I do want packets reassembled but I don't want any alerts.
> My 'snort.conf' settings relating to stream4 are:
>       
>       # stream4: stateful inspection/stream reassembly for Snort:
>       preprocessor stream4: noinspect
>       
>       # tcp stream reassembly directive:
>       preprocessor stream4_reassemble: both, ports all, noalerts
>
>
> My logs are filling with the likes of:
>
> [**] [111:18:1] (spp_stream4) Multiple Acked Packets (possible
> fragroute)
> [**]
> 10/21-10:08:41.883332 192.168.0.7:1257 -> 192.168.0.240:6400
> TCP TTL:128 TOS:0x0 ID:17792 IpLen:20 DgmLen:73 DF
> ***AP*** Seq: 0x9D744AC5  Ack: 0x610FCA  Win: 0x2054  TcpLen: 20
>
> OR:
>
> [**] [111:16:1] (spp_stream4) TCP CHECKSUM CHANGED ON RETRANSMISSION
> (possible fragroute) detection [**]
> 10/21-10:01:11.151709 192.168.0.6:139 -> 192.168.0.23:2898
> TCP TTL:128 TOS:0x0 ID:45791 IpLen:20 DgmLen:1500 DF
> ***A**** Seq: 0xC4F73351  Ack: 0x1FAC281A  Win: 0x2238  TcpLen: 20
>
>
> Does anyone know what I'm doing wrong here or what I'm missing please?
> (I am assuming the above log entries do tie in to the stream4 settings
> in
> snort.conf).
> I run no rules files except one - local.rules which is only 
> looking for
> specific outgoing text.
>
>
> Thanks,
>   Bryce Stenberg.
>      Harness Racing New Zealand computer department,
>      emailto:bryce () hrnz co nz


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