SRX

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Ask questions and share experiences about the SRX Series, vSRX, and cSRX.
  • 1.  How MD5 checksum works to confirm images

    Posted 10-28-2015 08:21

    Hello,

     

    I want to confirm how juniper secures its devices and image to prevent hackers who would want to modify the images in order to be able to have a back door to the network thereby making the network vulnerable. I heard juniper uses MD5 checksum to achieve this. Now my question is how would you confirm that the image has been modified/comprised.

     

    thanks in anticipation.

     

    Chinedu


    #chinedu


  • 2.  RE: How MD5 checksum works to confirm images
    Best Answer

     
    Posted 10-28-2015 20:47

    Hi Chinedu.Onwurah,

     

    Once you have the junos loaded on the device you can run the below command;

    > file checksum md5 <pathname> filename

     

    You will get a md5 value as the output. <output 1>

     

    After that go to the software download page and select the product and the version.

    You will get something like below;

     

    Install Package Checksum Release Format Size File Date
    SRX5000 Series MD5 SHA1 15.1X49-D20 tgz 549,863,886 21 Sep 2015

     

    Now click on the MD5 SHA1 link  you will get the value of MD5 , it will be <output 2> . Now you can compare the two values and  confirm if they are same the file is valid and not tampered with.

     



  • 3.  RE: How MD5 checksum works to confirm images

    Posted 10-29-2015 01:19

    Thanks SSN, I appreciate.



  • 4.  RE: How MD5 checksum works to confirm images

     
    Posted 10-29-2015 01:34

    You're welcome!