Re: Snort live IDS/IPS mode

Dear abrar,

Thanks for your email.  I believe you will find what you are looking for here: https://www.snort.org/documents/

Check out some of the install guides and they will help you look for dependancies.
— 
Joel Esler

> On Oct 15, 2023, at 5:17 PM, abrar khan via Snort-users <[email protected]> wrote:
> 
> So there was typo in the interface should be en0. However even after fixing that typo i get this error
> root@snort3:/home/snorty# snort3/bin/snort -c /home/snorty/snort3/etc/snort/snort.lua -q -Q --daq afpacket -i en0 -A cmg
> Couldn't construct a DAQ instance: create_instance: Could not find index for device en0 (-1)
> 
> I running snort3 using the following docker image ciscotalos/snort3. Does this image already include daq library? or in order to use daq i need to install the snort 3 from tarball instead?
> 
> Thank you,
> Abrar Khan
> On Thursday, October 12, 2023 at 11:30:20 AM CDT, Nordine Lahmar <[email protected]> wrote:
> 
> 
> Hello,
> 
> 
> The command you've provided is indeed structured correctly for running Snort in live IDS/IPS mode. However, the error message you're encountering, Couldn't construct a DAQ instance: create_instance: Could not find index for device eno0 (-1), is indicating a problem with the network interface specified (eno0). 
> The Data Acquisition library (DAQ) is unable to find or recognize this interface, which is crucial for Snort to capture network traffic in live mode.
> 
> Here are some steps you might follow to troubleshoot and resolve this issue:
> 
> Verify Network Interface:
> 
> Ensure that eno0 is the correct name of the network interface you want to use. You can list all available network interfaces on your system with the command ip link show or ifconfig.
> 
> Check Permissions:
> 
> Ensure that Snort has the necessary permissions to access the network interface. Running as root should provide these permissions, but it's still worth checking.
> 
> Check DAQ Installation:
> Ensure that the Data Acquisition library (DAQ) is installed and configured correctly.
> Check Interface Up:
> Ensure that the network interface eno0 is up and functioning correctly using the command ifconfig eno0 up or ip link set eno0 up.
> 
> Check for Typos:
> Double-check the command for typos or incorrect paths. Ensure that the path to snort.lua and other files are correct, and that there are no typos in the network interface name or other options.
> 
> Check Snort Configuration:
> Review the Snort configuration file snort.lua to ensure it's configured correctly for your environment.
> Check DAQ Module:
> 
> Make sure that the afpacket DAQ module is available and functioning correctly. You might need to install or reconfigure it if necessary.
> 
> Check Logs and Documentation:
> Review Snort and system logs for additional error messages or clues. The documentation for Snort and the DAQ library may also have useful troubleshooting information.
> Update or Reinstall:
> 
> If all else fails, you might consider updating or reinstalling Snort and/or the DAQ library to ensure you have the latest versions and that all components are correctly installed and configured.
> 
> Following these steps may help you identify and fix the issue preventing Snort from running in live IDS/IPS mode on your system.
> 
> Le jeu. 12 oct. 2023, 17:14, abrar khan via Snort-users <[email protected] <mailto:[email protected]>> a écrit :
> When i have logged in as root and run the command i still see the same error message
> root@snort3:/home/snorty/snort3# bin/snort -c /home/snorty/snort3/etc/snort/snort.lua -q -Q --daq afpacket -i eno0 -A cmg
> Couldn't construct a DAQ instance: create_instance: Could not find index for device eno0 (-1)
> root@snort3:/home/snorty/snort3# 
> 
> Is the above command the correct commands to run snort in live IDS/IPS mode? 
> 
> Thank you,
> Abrar Khan
> 
> On Wednesday, October 11, 2023 at 02:32:55 PM CDT, Joel Esler <[email protected] <mailto:[email protected]>> wrote:
> 
> 
> Need to be root?
> 
> 
> — 
> Sent from my iPhone
> 
>> On Oct 11, 2023, at 15:12, abrar khan via Snort-users <[email protected] <mailto:[email protected]>> wrote:
>> 
> 
>> 
>> Hello,
>> I am on mac running ventura 13.0 and pulled down ciscotalos/snort3 image. I am trying to run this command logged in as snorty but i am getting an error.
>> 
>> snorty@snort3:~$ snort -c /home/snorty/snort3/etc/snort/snort.lua -q -Q --daq afpacket -i eno0 -A cmg
>> Couldn't construct a DAQ instance: create_instance: Could not open the PF_PACKET socket: Operation not permitted (-1)
>> 
>> What do you i need change in order run snort live ?
>> 
>> Thank you,
>> Abrar Khan
>> 
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