Snort is an open source network intrusion detection and prevention system (NIDS/NIPS).

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Snort Sensor Placement

I have a snort sensor monitoring some of my network being fed from a mirrored port. This mirrored session only monitors traffic between the firewall and peering switch. Since this just sees traffic ...
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1answer
544 views

Outbound TFTP request to 255.255.255.255

Recently snort notified me that I have a user's computer on my network initiating an outbound TFTP request. The odd thing is the destination is 255.255.255.255 Anyone have a clue as to what this may ...
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1answer
4k views

Snort rules question [closed]

I just noticed my snort rules fired today on this, on a brand new ossim server I was testing. "shellcode x86 inc ebx noo" on with the source ip from Canada. The destination was my ossim server. Any ...
4
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1answer
2k views

Bench marking Snort and other IDS/IPS

I am looking for facts and figures of research or surveys done which have bench-marked Snort with other IDS/IPS on various parameters like overall performance, accuracy, speed, documentation, ...
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4answers
22k views

Testing Snort IDS installation

What is the easiest way to test Snort IDS after installing? Would using and writing a rule that captures all of the traffic work? alert ip any any -> any any ( msg: "ICMP packet detected!"; sid: ...
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2answers
5k views

How to connect sensors such as Snort to AlienVault SIEM?

I want to connect some sensors such as Snort and OSSEC to AlienVault SIEM. How can i do that?! Is it possible to send logs via syslog?
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2answers
1k views

Vulnerability scanner tools to use with Snort

We plan to add Snort with the firewall for our network to have improved security. The purpose, apart from protection from malicious traffic, is to customize Snort to detect and block specific traffic ...
2
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1answer
640 views

Classification of attacks in network specially in Snort IDS

What are the main classification of attacks in network and specially in Snort IDS?! Is it possible to power up the Snort by classifying the attack into for 5 main groups, for example; R2L, U2R etc. ...
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2answers
958 views

What IDS Do you recommend? [closed]

I am running a Debian Squeeze VPS and need a good IDS. I have used snort before and it was quite good but i am wandering if there are any other good ones out there. Preferably compatible with ...
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2answers
3k views

Snort false positive?

I've set up snort and am configuring it for my network. I have one vpn server making a connection to my dns/AD server. This connection sets off: GPL SHELLCODE x86 inc ebx NOOP The payload is as ...
2
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3answers
1k views

Reading Wireshark Result and Security Learning Recommendation

I am (not so) currently learning about security and right now I am learning about using Wireshark. I bumped into this video: ...
4
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1answer
565 views

SSL protocol issues on OS X and iOS

I have a PfSense box as a UTM, running snort among other things. I started noticing that when MacBooks and iPhones/iPods connect to my network, the snort log gets flooded with this message: ...
0
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1answer
113 views

Is there a Snort rule that equates to “something suspicious flagged from a client side application?”

The reasoning is what if an enterprise monitors snort alerts more-so than say syslog. Is there a specific pre-defined alert for 'client side app says something fishy is going on'?
4
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1answer
680 views

Help setting up Snort on Windows 7

I'm configuring Snort on Windows 7 with the help of this guy and I'm stuck at the following line in the config file: List of DNS servers on your network. I have multiple, how do I separate them? ...
4
votes
1answer
474 views

Logging True/False Negatives on Snort

I'm using Snort in a lab environmnet with artificially generated traffic. I'm looking to build a confusion matrix from known generated attacks. True Positives and False Positives are easy to parse ...
4
votes
2answers
1k views

Can you have 2 promiscuous (sniffing) ports on a single machine?

I'm wondering if you can actually have 2 (or more) promiscuous (sniffing) ports on a single machine, to monitor multiple network segments? And can you monitor them all with snort?
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3answers
6k views

Snort's great, but BASE isn't. What are some alternative front-ends?

BASE is an improvement over ACID, but it's easy to tell that it's maintained by someone who doesn't use it. There's no at-a-glance overview of network activity like you get with McAfee's NUBA IDS and ...