Intrusion Detection Systems

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6
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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 ...
2
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1answer
262 views

IDS/WAF scenario for 2 web servers

I'm running 2 web servers on 2 different physical hosts at home. They handle both HTTP and HTTPS traffic. I want to protect against web application attacks, but don't want to spend money for ...
1
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1answer
1k views

Is a honeypot an IDS or an IPS or something else? Is it an offensive or a defensive technique? Is it still effective?

I'd like to know where a Honeypot falls into the scheme of security, and if it is still an effective tool?
14
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7answers
2k views

Tripwire - Is it security Theater?

Tripwire type intrusion detection systems supposedly protect your system from rootkits, by monitoring the checksums of important binaries for changes. Let's say I have tripwire configured to run ...
3
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2answers
183 views

Is this enough for an NIDS

I am doing my senior project on network intrusion detection system (ethernet networks) and I am having a bit of trouble deciding if I have added enough features. Currently the system detects the ...
2
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2answers
256 views

Security model for datacenters

I have several datacentres and now I want to plan security for it, so it's resilient to external attacks. I need to make a security model which will cover my web servers, auth servers, log servers, ...
4
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2answers
818 views

Detect changes in /boot when using full disk encryption

When running a fully encrypted linux system using dm-crypt, the /boot partition has to be unencrypted to boot, as far as I know. I've setup a server that can be unlocked remotely by connecting to a ...
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 ...
5
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2answers
2k 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 ...
2
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4answers
487 views

Writing exploit code that bypasses IPS detection

Suppose that Network IPS/IDS can detect an exploit, however, the application server itself is still vulnerable to that exploit. If I modify the exploit code, are there IPS/IDS which will still ...
2
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2answers
735 views

How are signatures for IPS determined

For example , how do Snort's VRT team or some one who gives us the signatures, determine them at all ? I would be more interested to know , how are the traffic patterns analyzed against some known ...
1
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0answers
219 views

AD authentication with high amount of ICMP traffic [closed]

We have an IPS in place and it's constantly triggering ICMP / Ping flood signatures between workstations and AD server; or AD to workstation. I understand that ICMP is used for AD authentication. ...
4
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1answer
664 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 ...
1
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1answer
231 views

SNMP trap by legitimate program?

Is there any way to tell if this SNMP trap is something created by a legitimate program? Update: Hex Dump 0000000: 30 82 00 ec 02 01 00 04 06 70 75 62 6c 69 63 a4 82 00 dd 06 82 00 09 2b 06 ...
3
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2answers
585 views

C&C domains used by Flame/Skywiper trojan

I'm trying to figure out if any of our clients have been infected by the recent trojan/worm Flame. I have access to our proxy logs, so I want to search for any requests made to the "known" C&C ...
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, ...
1
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1answer
178 views

WEB long basic authorization string/Buffer Over Flow

I have a external user getting a weird error in the middle of using my website. The user authenticates, post a search for information, and then with the address of the search results page they get a ...
0
votes
1answer
136 views

Tracing The Source Of IDS/IPS Alerts

This may be more of a routing question than a security one but I am asking for the reason of security. I monitor an IPS on a remote network and there have been high alerts triggered recently that ...
1
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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 ...
3
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3answers
273 views

Is there an IDS based on process patterns?

After reading what Metasploit is able to do my grey hairs got even more. From my understanding current attack methods are being done without tampering with any file in a filesystem - thus rendering ...
1
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3answers
225 views

will all instrusion dectection will become host-based? [closed]

Will all intrusion detection become host-based once all network packets have been encrypted?
3
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1answer
369 views

tripwire report - inode number

I am investigating Tripwire and have stumbled upon something about which I am unsure. In a tripwire report generated after I modified hosts.deny to include an extra #, I noticed the inode number ...
7
votes
3answers
449 views

Popularity of Anomaly based IDSes

I've been reading quite some time about anomaly/behavior based IDSes for Web servers. I understand the downsides: possible high false positives, learning phase, constant training. My question is how ...
4
votes
1answer
671 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: ...
2
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2answers
1k views

Is traffic sent by Mouse Without Borders encrypted?

Some of our users have installed Mouse Without Borders and I wanted to know if it is possible to intercept the traffic being sent between the two computers and read it in some meaningful manner. I was ...
2
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1answer
371 views

Stateful Signatures in an IPS

I am researching IPS devices and their signatures both stateful and stateless. The test network I am looking to implement the IPS in has asymmetric traffic so stateful inspection would be nearly ...
0
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1answer
118 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'?
5
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2answers
10k views

Detecting the presence of wifi devices

Is it possible, with a normal wifi adapter, to detect present wifi devices in the surrounding? Let's say, is it possible to detect an Iphone with wifi switched on in the range of my wifi adapter? ...
5
votes
2answers
1k views

How effective is an IDS at catching targeted attacks

I have recently become very familiar with IBM Site Protector. As I understand things, Site Protector is in the top tier of IPS/IDS systems, used by some of the largest Fortune 500 companies. I was ...
1
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1answer
276 views

Can HIPS software practically be considered a form of MAC

Host Intrusion Prevention Software can restrict applications from taking certain actions regardless if they have the privileged to do so as assigned by the operating system. Given that with the use ...
0
votes
1answer
395 views

Rules for log analysis in an IDS

I am working on an IDS which has brought into the view of log analysis basically. I have to detect an intruder if there are any user behaviour anomalies present in the logs. I am having problems ...
1
vote
1answer
575 views

types of intrusions on host [closed]

I am implementing an IDS and just want to know that what are the possibilities with which the intrusion can occur.I am just doing a literature survey over the atacks possible so I want to know that ...
12
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9answers
21k views

Tracking down a rogue access point

Over the course of about a month we have received multiple reports of a rogue access point attempting to intercept traffic. I suspect an attacker is using a wifi pineapple, or similar hardware ...
2
votes
3answers
387 views

Implementation of an IDS

I am starting my final year project and I have decided to make an Intrusion Detection System, but I am a little confused where to start. I have read some papers and those have been pointing out the ...
2
votes
2answers
849 views

How can an IPS\IDS detect SQLi \ XSS (or other application layer) attacks?

I've been thinking about how an IPS works, and as far as I know it inspects the packets on the TCP\IP layer. How can it detect attacks on higher levels without harming the user experience? How does ...
5
votes
1answer
1k views

Blacklist IP addresses based on number of 404s in Apache

I'm getting a lot of hackers spamming my domain with requests for files that just don't exist. This is eating up a lot of my allotted bandwidth and I'd like to blacklist these IP addresses. Is there ...
4
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1answer
523 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 ...
13
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2answers
472 views

Detecting website attack attempts

I am currently trying to implement some recommendations from OWASP AppSensor Project and I'd like to respond to attacker, when he tries to break into my website. Is there any resource ...
6
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4answers
653 views

Is Stonesoft's “advanced evasion technique” a major problem?

A month ago, Stonesoft (an IDS constructor from Finland) has launched an alert about Advanced Evasion Techniques. With these techniques, they claim to be capable of launching attacks on a network ...
1
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1answer
202 views

OSSEC New Install: Scan and analyse full log?

When OSSEC is installed and started, it starts analyzing configured logs starting the date it was installed. Is there a way to have it scan and analyze the full logs?
1
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1answer
2k views

Power friendly home router, firewall, IDS/IPS setup?

For those that like to manage their own firewall and run IDS/IPS on their home networks, I'm curious - what are you using and is it power friendly? I used to have a shelf full systems doing various ...
0
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2answers
2k views

How do we protect our server from anonymous hacker? [duplicate]

Possible Duplicates: Hardening Linux Server How to best defend against Targeted Attacks? I read this news: Anonymous hacker group hits Apple, publishes data My question: How do we ...
9
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6answers
1k views

Applications of probability/statistics in IT security?

What are some areas of computer security that utilizes statistical modeling? I ask b/c I'm a studying statistics at school and have become interested after reading a few papers.. some of the areas ...
4
votes
2answers
517 views

Has anyone else seen commands embedded in an ICMP echo request?

My IPS recently detected a type 8 ICMP packet (echo request) with an unusual payload. The echo request command a fragment of a command that looked like part of a route add. Here's a PCAP of the ICMP ...
4
votes
1answer
314 views

Attacks against HIDS software running on the same machine

I am interested in the attacks that could be used to compromise or disable HIDS software such as Tripwire or Samhain. I understand that ideally checks should be run periodically and the database ...
5
votes
3answers
822 views

Best practice for creating an initial IPS policy

I see that most IPS available in the market comes with a basic pre-defined policy which administrators can base on when creating their initial IPS policy. However, these policy may be insufficient and ...
4
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3answers
391 views

Information gathering before deploying a Network IPS

I understand that most NIPS these days have either rules or signatures built in to them and perhaps gathering information prior to deployment may help in fine-tuning the rules / signature once the IPS ...
6
votes
3answers
504 views

How can an IPS be fingerprinted?

I'm not trying to solve a current technical problem but I came across this and have been wondering how it's done. Intrusion Prevention Systems are supposed to let all network traffic pass through and ...
11
votes
3answers
459 views

Do any of you who are *really* dealing with APT have any recommended intelligence feeds for SIEM/IDS/etc?

This question about Advanced Persistent Threats (APT) was posted by Rich Mogull on twitter. I copied it here because I'm curious too. Rich posted these follow-up tweets: And by APT I mean real ...
3
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1answer
267 views

Checkpoint NGX IPS & NAT

how does CheckPoint R65/R70 handle IPS violations of outbound traffic from hosts that are NAT'ed? Is it necessary to include the NAT'ed IP in the exceptions list or is it sufficient to include the ...