Intrusion Detection Systems

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8
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2answers
207 views

Can you tell if an attack is successful by looking at IPS logs?

In my organization, we have an IPS behind a firewall. Each time a security event is triggered, I am left to wonder if the attack is really successful. For events that are set to drop in inline, we can ...
1
vote
1answer
195 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?
0
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2answers
1k 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
votes
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 ...
22
votes
3answers
18k views

Simple example auditd configuration?

Auditd was recommended in an answer to Linux command logging? The default install on Ubuntu seems to barely log anything. There are several examples that come with it (capp.rules, nispom.rules, ...
4
votes
1answer
303 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
723 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 ...
17
votes
5answers
7k views

Do you detect/react to DNS tunnelling?

I've just seen a talk about tunnelling TCP/IP over DNS requests, because port 53 UDP is usually open and unfiltered. What techniques exist to detect and block such tunnels, and have you ever seen that ...
4
votes
3answers
375 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 ...
4
votes
2answers
488 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 ...
6
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3answers
434 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 ...
4
votes
2answers
1k 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?
3
votes
1answer
334 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 ...
3
votes
1answer
226 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 ...
6
votes
1answer
660 views

Intrusion Prevention Logs

I received an email from a client with IDS logs. I was wondering if the following log has any real indications of the server being compromised. If there are certain things I can do to diagnose the ...
10
votes
3answers
6k views

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 ...
5
votes
1answer
762 views

Tools to identify and report hacking attempts originating inside reputable organizations?

Re: Should I report hacking attempts? - Server Fault Lots of people look at their own logs for attacks from the outside. But who regularly reports such attacks back to the source? I'm mainly ...
13
votes
2answers
6k views

How do Intrusion Detection Systems (IDS) work?

How do Intrusion Detection Systems (IDS) work? As I understand it, they monitor network traffic but what exactly do they look for? How can they tell apart regular activity from intrusions?
11
votes
3answers
429 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 ...
16
votes
3answers
977 views

What techniques and tools do you use to relate security events?

You have central logging going, detailed app logging/alerting (e.g. modsec), network based security alerting (e.g. snort), and whatever else feeding your observation deck. Do you have any cool ...
12
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2answers
440 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 ...
1
vote
1answer
167 views

What is your experience with AlertLogic?

Do you have any insight, or experience (good or bad) regarding AlertLogic? In what areas can they improve, what areas are they lagging in?
6
votes
3answers
752 views

How do I identify an unknown port/protocol that my IDS picks up?

Googling a port and protocol leads to a terse description at best, and a linkfarm in the average case. Most protocols on assorted, unknown high ports contain little or no plaintext, and often if the ...
7
votes
3answers
430 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 ...
6
votes
4answers
625 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 ...
5
votes
2answers
142 views

Managing a team of IDS experts; how would you orgainze your team?

Suppose you are managing a team of Intrusion Detection Experts: ...what are the functional areas of the IDS knowledge space would you group your team into? ...how would you structure your team? ...
9
votes
3answers
523 views

What FOSS software do you like to use to build intrusion detection stacks?

Start-ups and organizations with limited budgets that are security conscious are often encouraged to deploy intrusion detection stacks. Given that prevention will always fail, intrusion detection ...
22
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8answers
9k views

Can I detect web app attacks by viewing my Apache log file?

I occasionally get clients requesting I look at their access_log file to determine if any web attacks were successful. What tools are helpful to discern attacks?
11
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3answers
293 views

What are the pros/cons of using a threat detection system?

What are the pros/cons of using a threat detection system for a web app (like OWASP's AppSensor)? What does a properly implemented threat detection system do and how does it behave when it detects ...