# x509 error

**URL:** <https://community.zeek.org/t/x509-error/5489>\
**Category:** Zeek\
**Created:** [October 10, 2018, 5:45am UTC](https://community.zeek.org/t/x509-error/5489 "2018-10-10T05:45:59Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Dk\_Jack](https://avatars.discourse-cdn.com/v4/letter/d/8c91f0/32.png) [@Dk\_Jack](https://community.zeek.org/u/Dk_Jack)\
**Post date:** [October 10, 2018, 5:45am UTC](https://community.zeek.org/t/x509-error/5489/1 "2018-10-10T05:45:59Z")

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Hi,  
I am seeing very large number of ‘Could not parse X509 certificate’ errors in my weird.log. The ssl cert is sent by the server. Could someone chime in on the reasons for this error. Thanks.

Dk.

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**Author:** ![johanna](https://avatars.discourse-cdn.com/v4/letter/j/50afbb/32.png) [@johanna](https://community.zeek.org/u/johanna)\
**Post date:** [October 10, 2018, 12:15pm UTC](https://community.zeek.org/t/x509-error/5489/2 "2018-10-10T12:15:23Z")

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Hi,

could you potentially provide a pcap that shows this and send it to me?

Without that it sadly is quite difficult to say what is going on. The error comes more or less directly from OpenSSL - so it does not like something in the data structure sent in the certificate message.

Johanna

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**Author:** ![system](https://canada1.discourse-cdn.com/flex011/uploads/zeek/original/1X/f09d732bc2cc7c7cc7e35db67cf4e1d5233ce7a7.png) [@system](https://community.zeek.org/u/system)\
**Post date:** [May 6, 2022, 3:46pm UTC](https://community.zeek.org/t/x509-error/5489/3 "2022-05-06T15:46:07Z")

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