Signature tuning

Similar Questions

• Common practice in the Signature Tuning

  Hello

  I wonder if anyone know or recommend, what signatures to tune in when a customer asks to signature tuning. There are approximately 3000 + signatures, so that we start with, and is there a common/best practices for tuning of signature.

  Appreciate your expertise.

  Mike

  Mike, I wish that I had an easy answer for you, but like most things in life it takes hard work.

  Signature development is something that should happen after an analysis of the event.

  You can start by choosing your heavy weight and looking at why these events are fireing.

  Ask yourself, are these events that I want to see? Are they REAL intrusions of are they false positivies? Are they usable?

  You can then disable signatures that provide no value to you, put down the severity of those that you can not do anything to the subject but still want to know (for example scanning for example) and to build filters for guests you know trigger signatures that you want to keep active (as if you were running a scanner vulneribility in your network).

  After the time you would have all of the signatures and filters that fit the environment, in that the probe has been placed.

  It is hard work and you must watch your packet captures to see what is happening, but it's how signatures are tuned.

  -Bob

• The syntax appropriate - Src-Addr filter IPS Signature Tuning

  Anyone know what the proper syntax to set the Src and Dest addresses in a Signature? I try to set the default value varies from Private IP as addresses of CBC in signature 3030 and get errors about the syntax.

  I have tried ip/netmask and set the netmask 255.255.0.0 as and so forth.

  Use a hyphen. So to filter all the 192.168.0.0/16 address:

  192.168.0.0 - 192.168.255.255

• IPS in data center

  4270 IPS connected to the distribution in the data center, each with each 6509, now the question is how to be redundancy/failover works in inline and out-of-use of the band.

  Yes, and especially any configuration change you need to do (such as signature tuning) must be made each individual sensor unless you have the CSM. This is quite annoying, your signature, it seems you work for a gold partner, message to Cisco, to stop the lame marketing stuff "we don't need regular tipping STP/ECLB enough" and ask them to provide an adequate failover.

  Cordially :)

  Farrukh

• Question about hamid 3325 - anyone know the value of RegexString?

  While trying to answer the question "what caused this fire signature?" regarding hamid 3325, I decided to use the signature tuning utility to try to understand.

  Unfortunately, other than knowing that this signature using the "TCP. Engine for the STRING' and it appears for ports 139 and 445, I do not know what exactly in the payload was originally signed to the fire.

  Does anyone have the exact value of the RegexString for hamid 3325?

  Thank you

  MCpl Alex Arndt

  ID of engineering

  WING

  The current regex is:

  \xFF\x53\x4D\x42\x32.*\x00\x01.*\x08\x01

  This will change in the update of signature S53 pending tests more.

• Outsourced nOOb Question ID box

  Currently, we outsource our ID box, at a cost of $300 per month.

  The area ID is OpenBSD, which I know a little. My questions are, the price seems high, and what should I know to set up my own box IDS?

  TIA!

  You don't need to know much about the underlying instrument used effectively operating system the ID.

  The knowledge needed to use the ID are related to the treatment of the events of signatures, tuning the IDS in your environment and in response to significant events indicated by the sensor.

  A GUI is anchored in the ID that allows the Web in the sensor to manage. An event viewer is available for download for to look you at events like the sensor reports to them.

  In the city, I have work, demonstrate us the sensors every two weeks to our interested customers. You can contact your local Cisco Office and see if there will be demos in the coming months, you could attend to familiarize yourself with the device.

  Hope this helps,

  Peter

• How you manage your signatures

  What you do with your signatures that are false positives and fire? Do you use event action filters or you turn off the signature? In some cases, I can see where it would be good to disable this signature. As if you have a DNS box which is patched and are not sensitive to a feat to get noticed by IPS - given that your system is patched and no other boxes are sensitive to the exploit so it seems logical to disable the signature, Yes? But the event action filters set up for signatures as GIS-3030, which, in most cases, it does raise that when the source is outside your network. I want just to make sure Im on the right track. Anyone know of a good site that treats of best practice, administration and policies IPS?

  Also how much is will monitor your network internal?

  Thank you

  When I'm troubleshooting a new alert I can usually 'connect pair packages' if I can put more context autour the alert itself. Although they get correlated in MARCH I use CSM for tuning the sensors and signatures. I'll cross-launch to IDM to pull down of the packet capture, recording descriptive names a little in case I need to see again them later. I also use a large engine netflow (mazu networks) of reporting to see where the PC suspect that happened and then use the tools online as dnsstuff.com, spamhaus DROP lists, Dshield, to see if the IP address is on a block list. This tool (as well as Arbor Networks, Lancope, etc.) also make their own behavior analysis network non-based on signatures and sometimes (not always) something with correlate here also.

  After that I get enough information I try to deal with the actions on the sensor itself. Sometimes it takes to fall back on a rule of drop of MARCH, just to rule out false positives or handle specific cases, but I think that its best to maintain the alert occurs first place. Having too many filters gets ugly fast.

  You should also be left Cisco Intellishield's service; each sig IPS subscription gives you access to detailed information on the IPS sigs and vulnerabilities that have encouraged the GIS in the first place (for free). Excellent service. I was able to disable a bunch of sigs using it alone.

  Good luck.

• Prevent or stop the attack without signature or signature disabled

  Hi IPS Expert,.

  Our IPS is always set as based signature and anomaly detection is not enabled.

  Is there a guideline that you can recommend to stop/prevent the attack without signature or signature is disabled.

  I understand that if the signature is not enabled, it will also create event or alert.

  This means that we will not have any idea when to stop.

  Kind regards

  Jhun

  Jhun-

  There are several reasons for which a signature can be disabled by default, but usually they are not active for a good reason.

  Signatures have a natural life span, they are created, tuned to detect variants of the vulnerability / initial attack. Later in their lives, once that vulnerability has been mostly fixed or patched, they can be disabled. Once they become rather old to have little use for all they retired.

  Other reasons a signature can be disabled, but that signature translates into a high rate of false positives. If you have someone perform analysis on the events that generates your IPS, you will waste their time and their talent with no productive events. It is the most common reason that a signature is disabled in an active sensor.

  The last reason, maybe you want a signature (or a family of signatures) disabled, it is that they do not violate security policy you. If your organization allows peer-to-peer file sharing they that you wouldn't need signatures to stop this activity.

  -Bob

• Well, it seems we could never be rid of errors, this time, the signature of the formidable problem: event name: BlueScreen

   

  Just replaced main hd, reloaded win7 and spent the last days of torque tuning system and now the 2nd today a system crash: blue screen.  thought with a new disk and memory, which was bad, new W7 and meticulously careful re - build I have no breaks down for awhile.  Any thoughts on this, and of course, all the solutions?

   

  Signature of the problem:

  Problem event name: BlueScreen

  OS version: 6.1.7601.2.1.0.256.4

  Locale ID: 1033

  More information about the problem:

  BCCode: 19

  BCP1: 00000003

  BCP2: 8579FDE8

  BCP3: 8551FDE8

  BCP4: 8579FDE8

  OS version: 6_1_7601

  Service Pack: 1_0

  Product: 256_1

  Files helping to describe the problem:

  C:\Windows\Minidump\022313-22125-01.dmp

  C:\Users\INTL1\AppData\Local\Temp\WER-34265-0.SysData.XML

  Read our privacy statement online:

  http://go.Microsoft.com/fwlink/?LinkId=104288&clcid=0x0409

  If the online privacy statement is not available, please read our offline privacy statement:

  C:\Windows\system32\en-US\erofflps.txt

  Hi Al Adams,.

  Welcome to Microsoft Community where you can find the answers related to Windows.

  As a pet the description provided, looks like you are facing a hard time with the Windows 7 operating system.

  BCCode: 0 x 19 00000019: this could be drivers programs antivirus/antispyware/security and other materials are also likely causes. Update of the great drivers and BIOS would be the best plan of attack. If we must also try to uninstall your antivirus/security as a test.

  Note: Changing the BIOS / semiconductor (CMOS) to complementary metal oxide settings can cause serious problems that may prevent your computer from starting properly. Microsoft cannot guarantee that problems resulting from the configuration of the BIOS/CMOS settings can be solved. Changes to settings are at your own risk.

  I suggest you to use Driver Verifier to identify issues with Windows drivers for advanced users:

  http://support.Microsoft.com/kb/244617

  Using Driver Verifier: http://msdn.microsoft.com/en-us/library/ff554113(v=VS.85).aspx

  See the steps in the following Microsoft article and check.

  Resolve stop (blue screen) error in Windows 7
  http://Windows.Microsoft.com/en-us/Windows7/resolving-stop-blue-screen-errors-in-Windows-7

  Notes:

  Running chkdsk on the drive if bad sectors are found on the disk hard when chkdsk attempts to repair this area if all available on which data can be lost.

  When you perform the system restore to restore the computer to a previous state, programs and updates that you have installed are removed.

  Before you perform the upgrade on the spot, I would recommend you to back your files using windows backup.

  Keep us informed on the status of the issue.

  If you need Windows guru, do not hesitate to post your questions and we will be happy to help you.

• No longer edit a signature in Mail

  After the upgrade to Sierra, I can change my mail custom signatures are no longer. Any change I return mail is started.

  Strange, it works for me.

  You might want to try to leave Mail, opening an Applications > utilities > Terminal and paste the following command:

  ~/Library/Containers/com.apple.mail/ ~/Desktop MV

  Reset. Your signature changes persist now? If so, you can trash the folder that has been moved to your desktop for more security.

• My signatures "Apple Mail" have all gone

  My Apple Mail signatures are gone!  I don't know how it happened.  When I look in mail preferences, all the signatures for all of my email accounts are now gone.  I have 8 setup of email accounts and had 10 registered signatures.

  Of course, along with millions of others, I give why apple cannot provide even a decent email client. But this issue is actually of rhetoric. For this post, I'd be completely satisfied to receive help to solve my immediate problem.

  Thanks for any help you can provide.

  macOS version 10.12 Sierra

  MacBook Pro (retina, 15 inches, mi 2014)

  2.5 GHz Intel Core i7

  16 GB 1600 MHz DDR3

  NVIDIA GeForce GT 750M 2048 MB

  Intel Pro Iris 1536 MB

  Re: rules of mail and missing signatures

  Hello!

  Try this out. Could help.

• Definition crashes when I try to change mail signature

  I had this problem until I upgraded to 10.0.2. Understood that the upgrade would be useful, but no dice. Details: a few weeks ago we moved our company's location, so I tried to change my signature in settings-> Mail, but whenever I type in signature field settings crashes and I get to my home screen. (Also, side-wth!) There is no mobile site for us at support.apple.com? Further evidence of the lameness of Apple).

  Have what troubleshooting you tried? Troubleshooting user steps include reboot, reset, restore from backup, restore to factory; tests after each stage.

  I'm not sure what you're referring in your statement «there is no mobile site for us at support.apple.com» Which you speak as 'we '? And, as you do not discuss Apple here, this is a user to user support site. If you want to share some thoughts with Apple, which must be done through their comments site, not here. http://www.Apple.com/feedback

• Mail signature does not stick!

  HI - no matter how many times I redo my Mail (on my Macbook Pro in early 2011) signature, my signature keeps back to an old signature (this not happen whenever I have emailed, but periodically, and then when he does, I can't go back to the new signature without re-creating a new signature).  It is an image with a link behind it to a Web site.  Help!? How can I get rid of the old signature for good?

  Finder > go > go to folder, copy and paste:

  ~/Library/Mail/v3/MailData/signatures/

  You can use quick look to view the content of each file.  Remove the offender.

  If you use iCloud drive:

  ~/Library/Mobile\ documents/com ~ apple ~ mail/data/V3/MailData/Signatures.

• IOS10 email for signature markup does not work now.  Help, please!

  I used much markup of the email for signing off e-docs.  However, I found that it does not work now after the upgrade to iOS10.  After set up my signature recorded and distributed, the beneficiaries, said the e-docs they received was not my signature signed on them (which was in previous iOS).

  That it would be much appreciated if someone could help solve this problem.  Thank you.

  It might be a bug in iOS 10.  It might be helpful to reach out to the Apple support for him noting if this is a bug.

• Installation of macOS Sierra results in the error message "load installer has no signature verification.

  I tried to do a clean install of Sierra several times and each time Setup reaches the end and then displays the message "the responsibility of the installer has no signature verification. This leaves the computer without a bootable Mac OS version.

  I tried to recreate the USB key with a new download installer.

  The first Apple support guy that I talked to said to make a recovery of the internet. The problem here is tries to install El Capitan, but never finished. The countdown reaches 0, then goes up to about 30 minutes back. It just keeps doing hours and hours.

  The second Apple support guy that I talked to said to do a regular restore (CMD + R), but it always goes to the recovery of the internet. I'm guessing that there is no restore partition.

  The computer has 10 Windows installed on a Bootcamp partition, and that seems to work very well. I can't installed macOS.

  The computer is a mid-2015 15 "MacBook Pro. I use the disk utility installation program to format the Macintosh HD partition. I used the El Capitan terminal Installer set the hour correct system. I tried to install using another USB port.

  I would appreciate help.

  Video of the problem of recovery of El Capitan Internet: https://www.youtube.com/watch?v=H5a4uUq_C3o

  Screenshot of Sierra install question: http://imgur.com/k79us9q/

  Access the item in window Menu at the top of the screen. Select the Setup log. This should give you an idea of why it's a failure.