Intrusion Detection Systems

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Bluecoat sc-filter-result: DENIED but s-action: ALLOWED [migrated]

I have a bluecoat server which sometimes creates rows which don't make sense: { ... "sc-filter-result": "DENIED", "s-action": "ALLOWED" } How is it possible to be both DENIED and ALLOWED?
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1answer
32 views

Use of server and root certificate in ssl termination and inspection

I'm researching vendors which allow SSL termination and inspection, I came across Cisco CWSA technology, the technology was somewhat easy to understand the stuff which really boggled my mind was the ...
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1answer
22 views

SNORT sfportscan alert format

How can I modify the output alert from sfportscan ? Ex : output alert_csv: /var/log/snort/portscan.log timestamp,src,dst,dstport,msg OBS: I can set output for default alert file with this method ?
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0answers
46 views

Help locate “snot” IPS/IDS testing tool? [closed]

It seems this great tool has been lost to internet backlog somewhere. I cannot locate it anywhere. The description of tools provided is http://www.securityfocus.com/tools/category/112 If someone on ...
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3answers
116 views

Large amount of foreign IPs hitting out firewall, is this automated scans or are we under attack?

I just got put in charge of a network. In the logs on our firewall I noticed that we had a large amounts of machines trying to connect to port 53 as well as about a dozen other ports. Are these ...
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2answers
188 views

Can I connect to a network without being detected? [closed]

Some people use software like whoisonmywifi and so on. Is there a way to bypass this software? I think it pings all IP addresses like 192.168.1.0/24 so it will ping all addresses. Can I disable ...
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3answers
101 views

Browser as Honey-Pot, is there?

I'm watching all this movement around Metasploit project, the great number of different exploitation plugins, and thousands of exploit packs. Now, it is real truth, anyone could configure his own ...
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1answer
14 views

Query on IPS reports

In the IPS reports i see multiple counts of the same exploit from the same source ip. I wonder why would someone continue to attempt exploiting a vulnerability when he must have realized in the first ...
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1answer
36 views

Nil events in IPS reports today [closed]

The IPS reports have one or two events minimum every day so far. But today there were no events, both in DC1 and DC2 reports. I am wondering if this possible? How come on a particular day nobody ...
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1answer
58 views

Intrusion Detection System and Network Intrusion Detection Systems [duplicate]

IDS (Intrusion Detection System), NIDS (Network Intrusion Detection System) What's the difference between IDS and NIDS? Can i use more than one IDS and NIDS at the same time? Or both IDS and NIDS ...
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0answers
55 views

I'm looking for a decent book on network and infrastructure security [closed]

I'm currently looking for a decent book on network and infrastructure security (especially in the enterprise context). Could you point me to one or two recent books, please? Thanks a lot in advance! ...
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2answers
58 views

How to make sense of, and act on, Snort Rules?

I am a relatively new Snort user with years of sys admin experience. I feel that I must be missing something, because I find Snort rules to be completely undocumented and incomprehensible. Because of ...
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1answer
66 views

Snort - Rule: Alert all php requests

I am trying to understand writing rules for snort. Further goal is detection of sql injections like here. I've read the documentation of snort rules and created this rule: alert tcp any any -> ...
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0answers
18 views

Security Data Analytics - Classical Measurements/Metrics

for my new Job I have to prepare information about how Security Data Analysis is actually use in practice. So my question is if someone can provide me with measurements/metrics/queries (don't really ...
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0answers
38 views

How to test OSSEC HIDS using a linux dataset containing raw system call traces?

I have been tasked to test effectiveness of OSSEC HIDS (by effectiveness I mean detection rate it achieves as well as false positives rate) when a dataset of raw system call traces are used. The ...
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2answers
168 views

NIDS/NIPS vs HIDS/HIPS

Can we interchangeably deploy a HIDS or HIPS instead of a NIDS/NIPS, what would be the risks, for example you have Symanetec EPS modules with HIPS policies enabled how are they different from a ...
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71 views

Host-based security architecture for web server network

I am begining with network security and after studying for a while about often used technologies I got to this architecture for my home server (sorry it is not in english). I considered 3 basic ...
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2answers
62 views

Security devices other than firewall and IDS [closed]

I was just studying about firewalls and IDS/IPS and had a doubt. Are these the only two major security devices that a company invests in? or are there other equipment and security controls?
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3answers
670 views

Can the IPS technology in a UTM prevent a DDoS attack?

Does a Unified Threat Management appliance (UTM) with Intrusion Prevention (IPS) enabled have the ability to prevent a DDoS attack? I have read some articles and none of them have a perfect ...
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1answer
81 views

Snort: Arpspoof preprocessor events not showing up in BASE UI

I have followed this guide to install Snort, using Barnyard2, BASE, IIS, and MySql. My Snort is up & running and loads of events are being logged. After weeding out some false positives, I wanted ...
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0answers
109 views

Snort alerts analysis (web interface) [closed]

I have a question about Snort (or maybe any other IDS/IPS, any working solutions would be ok). The goal is to set up some web interface providing a way to view the whole TCP stream packets of each ...
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1answer
34 views

Call For papers format help [closed]

I’m intending to submit a personal project for a “call for papers” for an upcoming Con. I have a really interesting topic that I wanted to submit for the talk. I was hoping to gain some feed back on ...
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1answer
117 views

Can Snort be configured as HIDS?

I need to give a presentation regarding Snort and Security Auditing. I have recently learned to configure Snort as a NIDS. I want to know is there any way I can configure Snort as an HIDS? If I am ...
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2answers
74 views

Detecting malicious domains/URLs [closed]

Do state of the art commercial URL threat intelligence feeds ( for example, one's by Symantec, Intel-security etc) miss malicious domains? (i.e. domains serving malware,exploit code & phishing ...
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4answers
685 views

Evading IDS in exploit development

In the context of buffer overflow exploit development, I was asked: Discuss how your exploit may be modified to evade an Intrusion Detection System. I'm not asking for my homework to be done, but ...
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3answers
89 views

IDS over HTTPS connection

I am designing an anomaly-based intrusion detection system in java. It basically consists of a sniffer that identifies HTTP header fields and then analyze them according to a previous configured XML ...
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1answer
134 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 ...
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1answer
202 views

Is it possible to detect a keylogger, when placed? [duplicate]

Can you detect a keylogger when it is placed? Would it be possible to do that via a keyboard removed event, expecting the keyboard is not removed regularly? So that you for example get a pop-up/alert ...
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0answers
75 views

Decrypt TLS from an IDS

So I am trying to figure out what the packet payload is off of a possible TLS HeartBleed alert from my IDS. I have read that Wireshark is able to do it with some certain keys, but isn't that in real ...
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167 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 ...
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1answer
62 views

Customize an Intrusion Detection System for serial communication

Most of the Intrusion detection Systems I know of is for IP Communication. But, lets assume that I have serial communication, i.e. CAN or RS485. On this serial Communication there are customized ...
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1answer
65 views

network IDS capabilities for attack detection [closed]

Is a Network Intrusion Detection System (NIDS) (pattern matching, protocol analysis or behavior analysis) able to detect buffer overflow in the network traffic?
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1answer
204 views

Setting up own enterprise SOC

the other day I was talking with a service provider (MSSP) who have experience with operating SOC (security operations centre) 24x7. Their price was rather steep (in the millions range). I don't ...
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1answer
58 views

Using snort with cloudflare? [closed]

How might Snort or another IDS system work with Cloudflare? Essentially, the originating IP would be CloudFlare's, therefore a proactive IPS might be difficult to install. I understand that ...
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3answers
156 views

Why Bash Shellshock vulnerability cannot be detected at webservers in advance?

There are lots of posts regarding the shellshock vulnerability. I can understand the vulnerability in detail. However, I'm curious about why any Intrusion detection system or host-based tools (e.g., ...
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1answer
85 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 ...
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1answer
542 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 ...
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43 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 -> ...
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1answer
112 views

Recommendations for installing OSSIM

I'm an apprentice in web security and I was assigned with the task of researching about OSSIM. Bear with my infinite ignorance as I take my questions to the stack exchange gurus. What I know so far: ...
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2answers
174 views

List of security products for my network [closed]

We are building and environment where mostly open source and trial versions would be used first before we purchase any product. I need your recommendation on the tools required to build a network that ...
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182 views

OSSEC not detecting deleted files?

I have configured 3 VMs: ossec server and two agents in CentOS 6 and Windows 2k8 R2. I have completed the setup and FIM and Log Management works smoothly. It also reports the new files. However, it ...
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2answers
982 views

What are the difference between IPS and WAF in terms of DDoS?

I have heard about both Web Application Firewalls (WAF) and Intrusion Prevention Systems (IPS). Which is better in preventing a Distributed Denial of Service (DDoS) attack and why?
2
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1answer
53 views

I want to filter Snort rules by date written [closed]

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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2answers
129 views

IDS across seperate AWS accounts

I have 2 separate AWS accounts and I would like to a Vuln scanner/IDS on one to scan another. One environment is a regular AWS account and the other is in AWS Gov Cloud. Due to limitations within ...
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1answer
331 views

How to detect/mitigate UDP port scan using OpenBSD and pf

One of our OpenBSD firewalls experienced a flood of UDP traffic from a compromised host within our internal network. The traffic was exchanged between the compromised internal host and a single ...
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3answers
741 views

Why do we need IDS/IPS if a firewall is present?

Why do we need IDS/IPS if a firewall is present?
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1answer
76 views

Why does IBM's Intrusion Detection System Show Local IPs instead of Public IPs for the Source of an Attack?

Security Intern here given the assignment to find the IP address of an attacker using IBM's IDS. The event or attack in question is entitled X509_Weak_Signature_Algorithm, and from what I ...
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1answer
187 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 ...
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171 views

Anomaly intrusion detection

Anyone know which opensource network IDSs are using anomaly techniques? My project is to compare them, so if you could give me some hints, that would be much appreciated. Currently, I am looking at ...
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111 views

HIDS that can detect attacks, take immediate action locally, and then report to a central service for re-broadcasting to other systems?

I've been researching this for a bit now and cannot find what I want. So I'm to the point where I'm weighing my options as to how I can proceed. Background I'd like to setup a HIDS that has the ...