Bruno Boni

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Bruno Boni

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To make the search efficient, first look for the exploit attempt, and then for the response. This two-step process works best because: The amount of traffic into the server is typically much less than out.

It is faster to search the traffic coming in. The exploit arrives on port , so is easy to filter on that port. The response can go out on any port number.

It it is therefore much faster to find the exploit than to find the response, so only look for the response, if you know the exploit has occurred.

This filter will identify heartbeat request packets where the ssl. If you see any results from this filter, then it is time to look at the heartbeat response.

So, back to your visualization! You could just stop there and look at everything sent to the attacker on any port, but depending on how much traffic that is, you might want to step through one vulnerable server at a time.

If slow and steady is your style, then you will also filter on the source IP address of the vulnerable server detected above, with destination port taken from the heartbeat request packet.

Now, launch Endace Packets and enter the same exploit response filter you used before: ssl. Now… What have I lost?

Overall size of the PDU will depend on how large the false payload size was in the exploit heartbeat request.

Time for Wireshark! What about workstations? The SSL heartbeat is symmetrical, so, in theory, an OpenSSL client can be attacked by a malicious server just as easily as a server can be attacked by a client.

This should be your next concern. Windows and Mac appear to be safe, but what about your Linux workstations? They have to go to a malicious website before you will see any exploit heartbeat requests coming to them.

Regards, Boni Bruno. Posted by Boni Bruno at PM 1 comment:. The EndaceProbe appliances, with 10Gb Ethernet 10GbE interfaces and 64TB of local storage, were deployed so that they could see, capture and record every packet on the network.

Between Tuesday at p. The dropped packet counter on the EndaceProbe recorded zero packet loss, so when I say that 72 billion packets traversed the network, I really mean 72 billion packets traversed the network and captured every single one to disk.

Those 72 billion packets translate to: 68GB of metadata that can be used to generate EndaceVision visualizations. Users of the network consumed more than GB of iTunes traffic 7th highest on the list of application usage and GB of bit torrent 10th highest on the list.

Whether vendors should be taking this as an insight into how interesting their presentations are is an interesting question in its own right!

The ability to see traffic spikes at such a low level of resolution is critical for understanding the behavior of the network and planning for the future.

With the wrong tools, you could easily be mistaken to thinking that a 1Gbps link would be sufficient to handle InteropNet traffic. In a few clicks, we were able to show that the problem was coming from a single user Silvio, we know who you are!

So, until next year, we bid Las Vegas farewell and head home for a well deserved rest. How long should I store packet captures?

How much storage should I provision to monitor a 10Gbps link? When is NetFlow enough, and when do I need to capture at the packet level?

These are questions network operations managers everywhere are asking, because unfortunately best practices for network data retention policies are hard to find.

Whereas CIOs now generally have retention policies for customer data, internal emails, and other kinds of files, and DBAs generally know how to implement those policies, the right retention policy for network capture data is less obvious.

The good news is that there are IT shops out there that are ahead of the curve and have figured a lot of this out.

Some common answers include: Respond faster to difficult network issues Establish root cause and long-term resolution Contain cyber-security breaches Optimize network configuration Plan network upgrades.

You may notice that the objectives listed above vary in who might use them: stakeholders could include Network Operations, Security Operations, Risk Management, and Compliance groups, among others.

While these different teams often operate as silos in large IT shops, in best-practice organizations these groups are cooperating to create a common network-history retention policy that cuts across these silos and in the most advanced cases, they have even begun to share network-history infrastructure assets, a topic we discussed here.

Some of your objectives may be met by keeping summary information — events, statistics, or flow records for example — and others commonly require keeping partial or full packet data as well.

Generally speaking, the items at the top of the list are smaller and therefore cheaper to keep for long periods of time; while the items at the bottom are larger and more expensive to keep, but much more general.

If you have the full packet data available you can re-create any of the other items on the list as needed; without the full packet data you can answer a subset of questions.

That leads to the first principle: keep the largest objects like full packet captures for as long as you can afford which is generally not very long, because the data volumes are so large , and keep summarized data for longer.

Next, you should always take guidance from your legal adviser. The choice here will depend on how tightly controlled your network is and on what level of privacy protection your users are entitled to.

For highly controlled networks with a low privacy requirement, such as banking, government or public utilities, full packet capture is the norm.

For consumer ISPs in countries with high privacy expectations, packet header capture may be more appropriate. General enterprise networks fall somewhere in between.

Whichever type of packet data is being recorded, the goal consistently stated by best-practice organizations is a minimum of 72 hours retention, to cover a 3-day weekend.

For the most tightly-controlled networks retention requirements may be 30 days, 90 days, or longer. GTP-C in mobile networks In addition to control plane traffic, in every network there are particular servers, clients, subnets, or applications that are considered particularly important or particularly problematic.

For both control-plane and network-specific traffic of interest, organizations are storing a minimum of 30 days of packet data. Some organizations store this kind of data for up to a year.

This flow data is useful for a wide variety of diagnosis and trending purposes. Best-practice here is to store at least days of flow data.

Samples and summaries: 2 years or more sFlow or sampled NetFlow, using or packet samples, can be useful for some kinds of trending and for detecting large-scale Denial of Service attacks.

Summary traffic statistics — taken hourly or daily, by link and by application — can also be helpful in understanding past trends to help predict future trends.

Because this data takes relatively little space, and because it is mostly useful for trending purposes, organizations typically plan to keep it for a minimum of two years.

One point to remember in maintaining history over periods of a year or longer is that network configurations may change, creating discontinuities.

Average vs Peak vs Worst-case? Should you size for 72 hours of typical traffic, or 72 hours of worst-case? The reasoning here is that when the network gets very highly loaded, someone will be dragged out of bed to fix it much sooner than 72 hours, so a long duration of history is not needed; but that person will want to be able to rewind to the onset of the event and will want to see a full record of what was happening immediately before and after, so having a system that records all traffic with zero drops is crucial.

Under worst-case load, when recording is most important, it could run at the full 10Gbps, which would fill storage 10 times as fast.

The good news is: best-practice here says you do not need to provision 10x the storage capacity, but you should be using a capture system that can record at the full 10Gbps rate.

That means that in a worst-case scenario your storage duration would be more like 7 hours than 70; but in that kind of scenario someone will be on the case in much less than 7 hours, and will have taken action to preserve data from the onset of the event.

Of course, the same considerations apply for other types of network history: systems need to be able to process and record at the worst-case data rate, but with reduced retention duration.

Other considerations The above discussion slightly oversimplifies the case; there are actually two more important considerations to keep in mind in sizing storage for network history.

Second, while we say above you should provision storage for typical load, most organizations actually use projected typical load, extrapolating the traffic trend out to months from design time.

How far ahead you look depends on how often you are willing to upgrade the disks in your network recording systems.

A three-year upgrade cycle is typical, but with disk capacity and costs improving rapidly there are situations where it can be more cost-effective to provision less storage up front and plan to upgrade every 24 months.

Implementing the policy When organizations first take on the challenge of standardizing network-history retention policy, they nearly always discover that their current retention regime is far away from where they think it needs to be.

Protocol validation is really a very effective way to address zero-day attacks, application attacks, worms, and numerous other attack vectors.

For example, let's say your web server receives a client request for an unknown method, before processing such a request, ask yourself what is an effective way to deal with unknown method attacks.

Would signatures be an appropriate solution? Maybe trapping the requests and creating an error on the web server would be a better solution — I would do this on the server side.

I would also argue, at least for network security devices, that inspecting the traffic for any method that exceeds a set number of alphanumeric characters this should be a configurable parameter would be a better way to go Say some unknown method is received over the network that is not a GET, HEAD, POST, PUT or whatever else you deem suitable for your web serving environment, instead of trying to come up with various signatures to combat an unknown method attack, simply allow a set number of methods and address the unknown methods by limiting them to say 15 characters.

Any unknown method attack that exceeds 15 characters in this example will not be allowed to the web servers. This will save on system resources, security analysis time, and provide a nice mechanism to address various protocol issues.

The unknown method attack I describe here is just one example I'm highlighting to show that protocol validation can capture any variant of an unknown method attack quickly and efficiently.

I've also designed systems for lawful intercept and hacked contracted hacker one of the largest digital asset management systems on the planet.

Lately I've been focusing on bigdata architectures, analytics and multi-cloud integration. These experiences, along with the colleagues and customer's I've been lucky enough to work with through the years, have provided me the skills required to safeguard some of our nations critical infrastructure and affect a paradigm shift in how information is analyzed, secured, distributed, monetized and consumed.

Feel free to contact me for demos, talks, or better yet, let's collaborate on building something fantastic! Welcome Services Portfolio About Contact.

Stay well! Joes CTF event. You can download the pcaps HERE. The network was left open for a week, but you will want to focus on Aug 4th and Aug 5th time frames in the pcaps Contact me.

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Aber was ist denn die Alternative? Samples and summaries: 2 years or more sFlow or sampled NetFlow, using or packet samples, can be useful for some kinds of trending and for detecting large-scale Denial of Service attacks. Many organizations have readily invested in various effective security technologies and personnel training to help improve security posture and minimize risk accordingly. Of course, the same considerations apply for other types of network history: systems need to be able to process and record at the worst-case data rate, but with reduced retention duration. Some Bruno Boni your objectives may be met by keeping summary information — events, statistics, or flow records for example — and others commonly Camp David Hannover keeping partial or full packet Casino In Duisburg as well. That will isolate the exploit attempts and responses. The exploit arrives on portso is easy to filter Jd Sports Dortmund that port. There are some nasty malicious PDF files read more… going around the Internet for which most Anti-Virus tools provide little or no detection. Implementing the policy When organizations first take on the challenge of standardizing network-history retention policy, they nearly always discover that their current retention regime is far away from where they think it needs to be. How much storage should I provision to monitor a 10Gbps link? Whether vendors should be taking this as an insight into how interesting their presentations are Siberia Spiel an interesting question in its Maria Himmelfahrt Feiertag In Hessen right! Valid heartbeat responses should also be less than 64 bytes. As a side note, Real-time NetFlow generation on dedicated appliances is proving to be a good solution Deutschland Italien Spielstatistik full recording options are not available due to privacy policy conflicts, these solutions can provide much better network visibility than legacy NetFlow implementations that Bruno Boni on network sampling, especially over 40G and G network environments. Leider verweigern Sie uns diese Einnahmen. Skl Los Dr. Javascript deaktiviert. Bruno Boni war ein italienischer Ruderer, der die olympische Bronzemedaille im Zweier ohne Steuermann gewann. Bei der Olympischen Ruderregatta auf der Themse bei Henley traten jeweils maximal drei Boote gegeneinander an. Bruno Boni – Wikipedia. Associazione Culturale Bruno Boni "Sindaco per Sempre", Brescia. Gefällt Mal. Gli scopi fondanti l'Associazione derivano dai principi di un comune. Tritt Facebook bei, um dich mit Bruno Boni und anderen Nutzern, die du kennst, zu vernetzen. Bruno Bonis Profilbild, Bild könnte enthalten: 1 Person, lächelnd. Creative Commons Attribution-ShareAlike 4. Sign in with Twitter. You are free: to share Mini Monopoly to copy, distribute and Wm 2021 Deutschland the work to remix — to adapt the work Under the following conditions: attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made.
Bruno Boni
Bruno Boni
Bruno Boni -boni bruno. Email me for speaking engagements, demonstrations, training, immersion days, workshops, anything to help you be more successful! Portfolio. 20+ Million Records A Second - Stream Processing with Kafka and Dell EMC Various Dell Technologies Publications I wrote. Bruno Boni, Actor: Virus. Bruno Boni is an actor, known for Hell of the Living Dead (). Bruno Boni de Oliveira Chief Marketing Officer / Partner at Eleven Financial Research New York, New York + connectionsTitle: Chief Marketing Officer / Partner .

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  1. Malagami

    Meiner Meinung nach ist es nicht logisch

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