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

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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 ...
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4answers
25k 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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1answer
1k views

How can an admin choose which Snort rules to enable?

The purpose is to configure Snort as an IDS to monitor network activity, and alert against the standard set of things an IDS should alert against--> buffer overflow attacks, injection attacks, port ...
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2answers
1k views

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 ...
5
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1answer
572 views

Snort alert log simple question

I am analyzing Snort alert log and cannot figure what [1:1071:6] means in 10/12-12:44:28.793118 [**] [1:1071:6] WEB-MISC .htpasswd access [**] [Classification: Web Application Attack] [Priority: 1] ...
5
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1answer
647 views

Setting up home lab with Snort and Vyatta - looking for resource recommendations or advice

I'm looking to turn a new desktop (Ubuntu 12.10-64bit) I built into a virtual home lab for testing and experimenting with various security things. The first setup I would like to try running is the ...
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2answers
1k views

Can installing Snort make me vulnerable?

I am using Ubuntu and am wondering if installing Snort on my host can make me more vulnerable?
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, ...
4
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4answers
609 views

Unicast ARP Requests: Considered Harmful?

I'm playing around with Snort's downloadable rules and I found one which is easy to activate: sending a unicast ARP request. Okay, so I start injecting ARP requests, making sure the destination is not ...
4
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3answers
443 views

Log Attacks in Different Files using Snort

How can I log attacks separately using snort. I basically want to log attacks invoked from different files separately. Like if I have 2 files, ddos.rules and log.rules, then I want logs generated from ...
4
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1answer
594 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 ...
4
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2answers
2k 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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147 views

Taking action for exploit attempts

Just recently I see I have had about 40 hits in one second for the following Snort rule- signature id 1:16008, which corresponds to the CVE-2007-6239: "... allows remote attackers to cause a denial of ...
4
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1answer
688 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
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1answer
496 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
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2answers
5k views

Snort (IDS) Don't show Port Scans

I have install Snort & acidbase by this instruction and access it through this local address 127.0.0.1/acidbase/base_main.php The problem is after scan it with nmap by this command sudo ...
4
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1answer
611 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: ...
3
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1answer
282 views

What is the danger of the “FTP RNFR ././ attempt”?

I am analysing an old attack and I got a scenario which does not really make sense to me. The attacker connects to the ftp service and runs a bunch "FTP RNFR ././ attempt". This is caught by snort as ...
3
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1answer
1k views

Are Kismet (on OpenWRT) and Snort IDS (on a linux server) compatitble?

I'm trying to develop an IDS/IPS system project to include these elements: A router running OpenWRT running Kismet drone (Attitude Adjustment 12.09rc1) A Linux server (Running Kismet server + client) ...
2
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2answers
360 views

Enterprise IDS - Deployment & Uses

I am investigating deploying the Snort IDS for an enterprise environment. This environment consists of a NOC that manages several servers, mainly internal but some internet facing. There are several ...
2
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1answer
603 views

How to add wildcards to snort rule ip address?

Is it possible to add wildcards or something that would function like them to a snort rule IP address? For example: If I'd like to detect source-ip of: 192.168.*.9 Where the third octet can be ...
2
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1answer
592 views

Open source or common implementations for reverse proxy web application security

I realize there is already a question similar to this one, but this is somewhat of a follow-up. I understand that a reverse proxy server by itself is hardly useful as a web app security measure ...
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1answer
249 views

Snort Rule Writing (Alert Fires But Traffic Does Not Match *Intended* Rule)

I have the following rule: alert tcp $HOME_NET any > $EXTERNAL_NET any (msg:"This should not happen"; flow:established,to_server; content:"GET "; depth:4; content:"Set-Cookie:"; http_header; ...
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1answer
4k views

Snort/IDS detect and alert on possible DoS/DDoS attack?

As per the title, I'm attempting to configure Snort to detect and alert on a incoming Denial of Service attack. Looking at the rulesets, which are primarily signature based rules, I can't see a ...
2
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1answer
863 views

COMMUNITY SIP TCP/IP message flooding directed to SIP proxy

I have installed Snort IDS and most alarm is: "COMMUNITY SIP TCP/IP message flooding directed to SIP proxy" And i use home DSL Internet connection , should i be worried about this alarm ? I have ...
2
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1answer
630 views

snort ignores packets with matching src/dest IP address

This is my rule: alert udp 192.168.1.1 4000 -> 192.168.1.1 7000 (msg:"This rule doesn't work"; sid:1234567;) I am running snort against a precaptured packet file where there are UDP packets that ...
2
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1answer
173 views

Swatch installation's issue to detect intrusion

I have installed snort and I want to use the swatch tool to send me an email when it detects something going wrong. I am using OSX and I followed the installation guide: ...
2
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1answer
2k views

Snort & Logging

I am looking for some support on using Snort in Windows 7. My experience so far is using WireShark, so this is new territory to me. I would like to use Snort to perform a trace, which, after it ...
2
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1answer
706 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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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: ...
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0answers
286 views

Security Onion:snorby alerts shows all local nerwork source IP(public and private)

I have just installed Security Onion distro based on ubuntu. This distro does a great job of combining multiple tools like snort/suricata,sguil,snorby,elsa,bro ids,squert. In my Security Onion ...
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0answers
194 views

Snort Parallelization Techniques and its effect on DDOS detection capability

I want to ask a query about snort parallelization. 1) Can snort detection rate remains same for all attacks after parallelisation? 2) As the parallelisation of netowrk traffic in each core is based ...
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3answers
2k views

Using an IPS as an alternative to mod_security

I am considering deploying mod_security as an addition to our web infrastructure. I am worried about the increased load however as these servers get a lot of hits. I am considering using IPS's such ...
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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
643 views

What type of data does Snort log?

This is new to me, but what types of data does Snort log for Network Intrusion Detection? I am guessing time stamp, source IP address, destination IP address, source port, destination port, protocol. ...
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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 ...
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3answers
88 views

Is there any hardware solution for IDS?

Are there any products that let you see and set IDS [Intrusion detection system] on router or any another hardware that is connected to the router? All the ones I have found of them are Operating ...
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2answers
196 views

How to detect Snort on the network?

Does anyone know how to fingerprint an IPS ? is there any tool available to do the job? I want to detect snort in my network . Would appreciate any kind of help.
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1answer
396 views

Block Packets in snort

In rules Configuration of snort , this is allowed: alert tcp any any -> any any (msg:"HTTP Connection"; react:block;) however when i write this is allowed: alert icmp any any -> any any (msg:"HTTP ...
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1answer
835 views

Snort, add TCP retransmission rule

Can somebody help me with adding rule for packet retransmission. I found some documentation about the snort rules, but I am confused how to use it. The rules which catches the packet retransmission ...
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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 ...
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2answers
1k 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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0answers
13 views

I want to filter Snort rules by date written

I would like the ability to look at Snort rules that were written in specific date ranges only given a collection of .rules files from either Sourcefire or Emerging Threats. Is this possible?
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0answers
150 views

Snort sfportscan does not log in unified2 file format

I'm running Snort version 2.9.6.0 and I'm not able to log events from the sfportscan preprocessor using the unified2 file format. This is the conf (actually is the default one): preprocessor ...
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0answers
224 views

Snort not showing dropped/blocked packets

This question is about SNORT- I m basically trying to detect PING FLOOD attack. I have included the rule**(drop icmp any any -> any any (itype:8; threshold, track by_src, count 20, ...
1
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1answer
488 views

Are there any test cases to ensure the “web-attacks.rules” snort file works correctly?

I have set up an free evaluation Confluence Server on my local host and have configured "snort.conf" to point to my localhost as "HOME_NET" environment variable. I tried to test the ICMP rule by ...
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1answer
477 views

How to write Snort rules based on MAC address?

I would like to create Snort rules based on MAC addresses instead of IP addresses. Most devices on the network are DHCP assigned, and I would like to ignore certain traffic (ex: Dropbox) for some ...
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2answers
169 views

Can't understand SNORT rule pcre option syntax “?P=name”

While trying to understand some SNORT rule lines, I came across the following syntax that I could not figure. Could not find any description in the manual (though admittedly I've not read it all ...
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3answers
101 views

IDS in combination with vulnerability scanner

I'm planning to set up a server environment with high security requirements on which i want to install an intrusion detection system (snort). Additionally, I think of running a vulnerability scanner ...
0
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1answer
187 views

IDS false positive rates

Are there any industry accepted standards for the false positive rates for a Network IDS based on Snort? Is there a way to check the false positive rates in a deployed IDS? (ideally without looking at ...