Intrusion Detection System, a system for detecting and alerting based on behavior.

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2answers
34 views

Distinction of DPI and IDS

I'm currently reading about Intrusion Detection Systems (IDS) and noticed a huge variety of definitions for the term of Deep Packet Inspection. Especially the NIST shows three different techniques in ...
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1answer
10 views

(spp_sdf) SDF Combination Alerts in Snort

I'm testing Snort in IDS mode and have been receiving a few (spp_sdf) SDF Combination Alerts as below. Seems like it happens when I visit certain but not all https sites. Tried to google this alert ...
1
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1answer
37 views

Are snort rules applied per packet or per flow

I would like to understand if snort rules are applied for each packet in a flow between a source and destination separately? For instance, when packet 1 of the flow arrives at the IDS, all the rules ...
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1answer
43 views

snort rule to detect relay attempt not working

I am trying to detect a relay attempt on smtp server, but nothing gets logs when I test it out. The snort rule to detect a relay attempt which I tried using is: alert tcp $SMTP_SERVERS 25 -> ...
0
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0answers
17 views

Snort matching against single packets

For a specific task, I'd like to match snort rules against the first 1-2 packets of each flow in the network without waiting for the other subsequent flow packets. Can I do this with snort? If so, ...
0
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1answer
31 views

Do I need ossec for my personal home computer? [closed]

Do I really need a HIDS like ossec, or will using good passwords, using a firewall, an antivirus/antimalware program, and a rootkit scanner do the job well enough?
0
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0answers
45 views

Suricata IPS manual blocking/unblocking vs. snort and guardian

Does anyone have experience with using Suricata as an IPS? Im on Debian and I'd like to be able to manually block and unblock specific ip addresses (iptables). I've not used Suricata as I am currently ...
-1
votes
1answer
30 views

Which method is the best for IDS : heuristic or signature based? [closed]

In signature based IDS: it maintains a database of the signatures that might signal a particular type of the attack. Problems: New attack that has been specifically constructed in order to not ...
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0answers
18 views

Current Decryption Support for TLS [duplicate]

I've been locking things at clients down recently and ran into a side effect I hadn't really thought about were TLS traffic using DHE based ciphers can't be decrypted with SSLDump or Wireshark. I ...
4
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2answers
79 views

What is the difference between a HIDS/HIPS and an anti virus?

I have gone through what IDS/IPS's are. I understand the difference between a NIDS/NIPS and a HIDS/HIPS. But Host IDS and Host IPS sound like an antivirus software to me, is there a difference?
4
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1answer
208 views

Is it possible to detect DPI (Deep Packet Inspection)?

If one suspects one's packets are subject to DPI, how can it be detected?
5
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1answer
77 views

Using a single number instead of an IP address or a DNS name, which are concrete uses? [closed]

My question: I have read that using the single number equivalent (called the "binary equivalent" by the author) of the IP address instead of the actual IP address or the domain name can be used "to ...
1
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0answers
39 views

What kinds of features are useful for network security visualization? [closed]

I just want to know is network security visualization are practical for enterprise network administrators? (Which I am not) And if it is what kind of tools they uses and what kind of features they are ...
1
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2answers
64 views

How eavesdropping attack takes place in network

I am learning some concepts of network security and I have the following question: One case of eavesdropping attack is that an adversary somehow places himself inside a network to order to capture ...
3
votes
1answer
61 views

Detecting botnets that use HTTP instead of IRC

I know most bots use either IRC or HTTP to communicate with the C&C, and http unlike IRC can't be blocked. So if a botnet is using HTTP, how can this be prevented? Just theoretical!
3
votes
1answer
54 views

How to make Snort not log sensitive data from the sniffed traffic?

I have Snort in my network which I use for IDS and it is residing on a VM that receives all mirrored traffic from the switch. I am having a web applications that users use and they login, operate on ...
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0answers
24 views

Snort arpspoof preprocessor not giving alerts

I'm attempting to use Snort to detect a simple arpspoof attack on a test network I've set up. I have the following 4 ip addresses on this network. 192.168.1.1 Router 00:18:39:EC:F5:78 192.168.1.2 ...
0
votes
1answer
63 views

Suricata rule to block particular website question

I am writing rule for suricata which is going to block the possibility to enter one of the website for example xyz.com (instead of facebook, because with facebook there are some problems). I am doing ...
2
votes
3answers
70 views

Multiple SSL Inspection

I want to ask you if you think that doing SSL Inspection in proxy mode (Resign) could be a problem. The scenario is the following: 1 --> 2 --> 3 Client web browsing IPS device with SSL ...
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0answers
31 views

Snort rule to detect More Fragments fragbit not working

I have a Virtualbox setup with Snort running on a Windows 7 host and Kali Linux as the attacking machine, connected on an internal network. I'm investigating ways to get Snort to detect fragmentation ...
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0answers
44 views

Is EasyIDS obsolete?

I have found EasyIDS from Skynet Development recently but noticed that the latest change-log is from 2009. Does this mean it is obsolete and should not be used as it is not being kept up-to date?
0
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0answers
31 views

Switching from Snort rules to Emerging Threats. Is there a way to know which ET rule sid covers the same vulnerabilty as Snort rule sid?

Our company has been using the snort community rules and we have tuned our rule files over years to our specific needs. Now our company has decided to use Emerging Threats (ET) open rules. The ET ...
0
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1answer
46 views

fwsnort - How safe compared with Snort/Suricata

How safe is 'fwsnort' compared to a real Snort / Suricata instance? Whats the percentage of VRT / ET Rules, that fwsnort can actually use? I read somewhere from an older article its only ~ 60% - is ...
6
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1answer
352 views

How do I identify which PC made a suspicious DNS query?

Our IDS detected a suspicious DNS packet going to a Botnet (or similar). Since that DC is a recursive relay, how can we identify the client who made that request. (Windows DNS server)
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0answers
11 views

Adding Windows 7 VM as a log source/forcing the IDS inline

I'm investigating ways to add my Windows 7 VM as a log source or even run that traffic through my IDS VM and then out to the internet but I'm not entirely sure how to approach it. Does anybody have ...
1
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1answer
16 views

IDS device behaviour

Which of the following is a reasonable response from the ids when its detects ip packets where ip source address and port is the same as the destination IP address and port A. Allow the packet to be ...
1
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0answers
12 views

get session data (stream data) into Snort ids [closed]

Can any one point to me where (in the code) Snort are stored just before they send to httprespect or got written to the output files? Thanks.
2
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0answers
41 views

Priming an IDS/IPS for an impending attack

Is there a system which can put an IDS/IPS in "high alert" mode if there information about a suspected impending attack in the near future (obtained from an external system)? I would like to know if ...
2
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0answers
39 views

problem blocking TCP scans by setting up honeyd in virtual environment

I am creating a virtual environment where I have created three virtual machines, CentOS as an Apache Webserver CentOs as an Attacker machine FreeBSD with Honeyd to setup Honeypot I have ...
2
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0answers
45 views

Extra p0f v3 fingerprints files?

p0f v3 is a passive operating system detector. The latest release is 3.08b, dating to November, 2014. Given the releases of Windows 10, multiple Linux, Firefox and Chrome versions since then, the ...
20
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5answers
2k views

DoS in local network computer

I'm using Snort to study detection, and I wanted to simulate a DoS attack from the inside to another computer in my home network, but I have a question. If I start to flood the target computer with ...
-1
votes
1answer
116 views

Configuration audit for IPS/IDS [closed]

I have been given the task of configuration audit as my first task in my first job. As a challenge I have to find vulnerabilities by reading the logs of the PuTTy session and I do not have access to ...
0
votes
3answers
70 views

Difference between brute-force and dictionary-based in the mitigation process of the IPSs

I am working with Bro IDS and CIF ( cyber threat intelligence) using the Intel framework I am testing. How can I mitigate brute-force and dictionary-based attacks? I found that the mitigation ...
0
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1answer
50 views

Windows SQL Server Intrusion Detection [closed]

I'm looking into Snort to carry our basic intrusion detection, but finding it hard going. What other Intrusion Detection software is there that is good to use for SQL Server?
3
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1answer
35 views

Host Based Prevention System definition

I'm a little bit confused about what a host-based intrusion prevention system is. In order to better understand this concept, I'd like to introduce you a case. Let's say someone designed the ...
1
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1answer
59 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 ...
2
votes
1answer
92 views

SNORT sfportscan alert format [closed]

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 ?
2
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0answers
134 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 ...
1
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3answers
237 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 ...
1
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2answers
274 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 ...
3
votes
3answers
194 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 ...
1
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1answer
16 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 ...
0
votes
1answer
43 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 ...
0
votes
1answer
184 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 ...
3
votes
0answers
72 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! ...
0
votes
2answers
287 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 ...
0
votes
1answer
154 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 -> ...
0
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0answers
26 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 ...
1
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0answers
97 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 ...
0
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2answers
1k 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 ...