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

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2
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1answer
33 views

Ideas on how I can fragment captured network traffic?

I am trying to create a lab environment where I can analyze common IDS solutions (starting with Snort specifically) and their ability to reassemble fragmented IP trains. I have a collection of ...
0
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0answers
34 views

problem with my snort rule

I have written this rule but when I try to reload Snort it is failing. I have commented out the rule and reloaded snort; it is working so I know it's the rule. alert tcp any any -> any 5466 ...
1
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1answer
47 views

Snort even though working properly does not report majority of rules

I have installed Snort 2.9.7.0 and it does not detect majority of attacks, such as nmap port scans, downloading exe files, opening documents containing keyword "root". I use Snort together with ...
1
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0answers
34 views

Snort rule for outgoing attacks [closed]

I have a pcap file captured from a user PC. I need to analyze whether it has initialized a DOS attack to any server. alert tcp any any -> any 8080 (msg:"DOS flood denial of service attempt"; ...
0
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1answer
65 views

How to run a snort rule over pcap file

I have a pcap file, and what I wanted to know is how can I apply the Snortrule below which I've already written within the rules folder in my log folder: alert icmp any any -> any any (msg:"TCP ...
0
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0answers
30 views

What is a Packet Identifier (pid) used for?

I'm trying to analyze a pcap file using snort using the following command: snort -r file.pcap I got the output which had n number of packets and at the top i had this Packet Identifier pid=14782. ...
1
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0answers
114 views

How can I find threats/attacks from a PCAP - Wireshark, Snort [closed]

I have a pcap file and I am trying to analyze it using Snort and Wireshark. When I tried the command, which I had showed below, in Ubuntu I was provided with various output such as the date, time, ...
0
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0answers
36 views

SNORT only alerting on inbound traffic [migrated]

I am trying to raise an alert when someone is setting up a connection to PORT 25 (tcp), whatever source or destination. For this i came up with this simple rule: alert tcp any any -> any 25 ...
1
vote
1answer
61 views

What could this set of IDS alerts be (DDNS deaftone.com darktech.org chatnook.com, …)?

Below is a screeny of my Squert GUI showing the Snort events. Notice they all happen at the same exact time. I cannot figure out what the source of it could be. Any ideas? Edit: It looks like the ...
0
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1answer
57 views

Using OpenAppID without Snort

Cisco Security introduced open source application detection and control mechanism which called "OpenAppID". Which can be checked in the link Lets say I have a sniffer application for myself; if I ...
2
votes
1answer
129 views

Snort IDS for Amazon deployment

Is Snort a good choice for monitoring network and web application traffic on Amazon EC2? If not, why and what IDS would you suggest? Is Snort a good choice to monitor for XSS, Sql Injection, attempt ...
1
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0answers
37 views

Snort only detect local issues [on hold]

I have installed two physical machines with KVM virtualization using Red Hat as OS ( h1 and h2). In h1 I have installed the virtual machines w1 and db1 In h2 the virtual machines w2 , db1 and ids. ...
0
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0answers
35 views

Possible to run snort without modifiers?

Is there anyway (e.g some command line argument) with which we can tell snort to run and perform detection but without caring for the rule modifiers if there are any ? e.g alert tcp any any -> ...
1
vote
2answers
37 views

Separate normal traffic [closed]

Is there any tool or method to separate normal traffic and malicious traffic from pcap? For example : if malicious traffic detected with snort i need to store those packets .only if malicious traffic ...
2
votes
1answer
36 views

I want to filter Snort rules by date written [on hold]

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?
0
votes
1answer
55 views

Where does Snort log the messages when using a pcap file?

When you're using Snort for real-time monitoring the messages are logged to /var/log/snort/alerts. However, when you load a pcap file, where do you see if any packet triggered a rule? Because they ...
0
votes
1answer
99 views

Snort Rule Comparison

As far as I read, Emerging threats and VRT Snort rules are available freely, and also Pro (fee based). Is there any comparision, or anything to suggest choose one over another? What are the benefits ...
4
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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?
0
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3answers
137 views

Is there any hardware solution for IDS? [closed]

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 ...
0
votes
1answer
186 views

How can I test a DoS attack against snort?

I need to set up an scenario where an attacker DoS attacks port 80 of an server while snort and others users try to connect to port 80 at the same time. Something like this: 1000 connections to port ...
0
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1answer
76 views

What does this Snort rule do? [closed]

Rule-4: alert udp $EXTERNAL_NET any -> $HOME_NET 3333 (msg:"ET EXPLOIT Wireshark ENTTEC DMX Data Processing Code Execution Attempt 1"; content:"|45 53 44 44|"; depth:4; content:"|04|"; ...
0
votes
1answer
126 views

SNORT alert for Trufflehunter SFVRT 3:29312:1

I am seeing this Snort alert show up multiple times a day, but my Google-foo is failing me, as I can not find any information about this alert on the internet. Can anyone point me in the direction ...
0
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2answers
313 views

honeyd is still a good alternative?

I've been investigating to deploy a honeypot for research purpose, Honeyd seems like the most popular and adequate option to my needs, but it seems too old, the last version of this software was ...
0
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2answers
306 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 ...
0
votes
1answer
354 views

What shoud I do for solving this problem ? Problem is about SNORT [closed]

Snort, daq and WinPcap are installed. The rule files are located at a convenient place. How can I solve this problem? A clue is the ERROR line: Missing/incorrect dynamic engine lib specifier.
0
votes
1answer
38 views

Multi flows snort rule

Is it possible to write a snort rule that match on 2 different flows? For instance on a communication from host-a <--> host-b that happen at the same time as a communication on host-a <--> ...
0
votes
1answer
349 views

Are my Snort rules correct?

I am trying to do a Snort demo and I though it would be nice to detect a real threat. I picked the sasser worm and the jolt/teardrop dos attacks for the demo; no particular reason. Out of the three ...
4
votes
4answers
1k 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 ...
1
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2answers
241 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.
1
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0answers
73 views

Barnyard2 Can't pull xref from unified2 format

I have snort configured to log unified2 in my snort.conf file and am using barnyard2 to parse the unified2 results. It works, except I can seem to figure out to pull the event reference (xref) out of ...
0
votes
3answers
127 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 ...
1
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0answers
171 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 ...
2
votes
1answer
295 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; ...
-1
votes
1answer
224 views

Snort / PulledPork event filter via modifysid.conf not filtering traffic [closed]

I'm using SecurityOnion with Snort/PulledPork/Snorby. I am getting multiple "ET POLICY Pandora Usage" alerts a minute for the same source and destination. I want to threshold these to get 1 alert per ...
4
votes
3answers
513 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 ...
0
votes
1answer
543 views

How to use an OR condition with the content of a snort rule

I understand that if you specify multiple contents then the rule triggers only if ALL the content conditions are satisfied. But I want to create a rule that will trigger even if any one of the ...
0
votes
1answer
67 views

How to log packets which are allowed by SNORT?

Suppose i have not written rule for a type of attack in SNORT; It is obvious that it wont show any alerts. I wanna develop a system wherein i capture packets that SNORT allows n do further processing ...
1
vote
1answer
552 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 ...
1
vote
0answers
310 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, ...
5
votes
1answer
744 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] ...
0
votes
1answer
215 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 ...
0
votes
1answer
38 views

Handle snort's rules remotely [closed]

I have multiple snort sensors in my network and i would like to handle the rules of each one remotely. Is there any software that do that ? thanks in advance
-3
votes
1answer
553 views

Web GUI for Snort + ModSecurity [closed]

I'm trying to find a suitable (or easily modifiable) web GUI for snort + modsecurity logs. As far as I know, Splunk can do that by installing the snort and modsecurity plugins. Is there any other ...
3
votes
1answer
329 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 ...
2
votes
0answers
322 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 ...
2
votes
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 ...
0
votes
1answer
70 views

How to specify a Snort rule connection duration?

Is it even possible to specify into a snort rule the duration of a connection? For example: in this format Hour, Minute, Second H, M, S = 0, 2, 1 If a connection that has the duration of 2 minutes ...
2
votes
1answer
655 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
votes
1answer
907 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 ...
4
votes
2answers
6k 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 ...