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I'm getting thousands of these a day, most times (99.99%) with internal sources, sometimes with an external source.Firmware is 17.1.3 MR3
In reply to FloSupport:
I am getting a million a day on every customer at 17.5.3 MR3 and the command in 133096 not present in console.
In reply to Eren Ertas:
Hi Eren Ertas
Apologies for this inconvenience.
Note that you can still input the command without having to tab auto-complete it: "set ips tcp_option detect_anomalies disable"
Please PM me if you continue to experience issues regarding these alerts.
Let me check and watch a while
I'm working around the same problems
No IPS on this firewall Rule ( 8 )
console> show ips_confconfig stream 1config maxsesbytes 0config stdsig 1config qnum 10config maxpkts 8config disable_tcpopt_experimental_drops 0config mmap 0config enable_appsignatures 1config mmapfilepath 1config failclose offconfig memmode 1var SEARCH_METHOD hyperscanvar SIP_STATUS enabledvar IGNORE_CALL_CHANNEL enabledvar TCP_POLICY windowsvar LOCAL_RULE local.rulesconfig cpulist 0:1var TCP_BLOCK nblockvar DETECT_ANOMALIES no
Errors when Sharing files
With IPS Service Stoped , the fole share works fine
Firmware Version (SFOS 17.5.1 MR-1)
It seems it's not resolved
Hey Eren Ertas
Would it be possible to please enable the support access tunnel on your appliance and PM me with the ID? I'd like to take a closer look at your reports.
In reply to rdebraga:
Your issue looks to be a different one, as the IPS signature being triggered is listed:
I would also request for you to enable the support access tunnel on your appliance and PM me with the ID for a closer look.
I have same issue on V17.5.3 MR-3.
New user here an i am seeing the same issue with speedtest.net when i test with the ips off my speedtest is 900 mb/s when i turn the ips on it drop to 240 mb/s. also i did do the disable command running latest version.
In reply to ShunzeLee:
Have you tried to troubleshoot by disabling this setting?
Full context here.
Thanks, it works after input the command.
Sophos didn't fix the bug on V17.5.3 MR-3...
I'm getting thousands upon thousands of these errors in my Sophos XG135 rev.3, it's showing nearly 50k just yesterday for an office of 7 people. I'm running 17.5.3 MR3. I can run the command on my console to disable the anomaly detection. But by doing so, am I disabling the ability to detect or use any IPS functionality?
In reply to Brad Hall:
Hey Brad Hall
Copy and paste from here:
This specific IPS signature has been disabled by default, starting with SFOS v17.1.4 MR-4 due to customers experiencing excessive false-positives.
These IPS signatures are triggered by TCP anomalies (includes RST packets received outside of window). This was causing some customers to experience valid RST packets being false-positively dropped.
Customers still experiencing excessive false-positives should raise a support case for further investigation. However, this setting can also be disabled via the console command (set ips tcp_option detect_anomalies disable) to allow the TCP anomaly decision to be made by the host client OS instead if desired.
Sorry for the late response.
Did the Console Command: set ips tcp_option detect_anomalies disable
Response: Already Configured
Since I was in the device. Updated firmware, Current Firmware: (SFOS 17.5.3 MR-3)
I will monitor the errors and report back (sooner this time).
FloSupport I ran the command listed. Viewed my Firewall this morning and I now have 0 "attacks/errors" showing. It appears this took care of the issue over the weekend. I'll monitor and report back if I see any further items regarding this issue.