# On conn.log

**URL:** <https://community.zeek.org/t/on-conn-log/3589>\
**Category:** Zeek\
**Created:** [May 11, 2015, 10:24am UTC](https://community.zeek.org/t/on-conn-log/3589 "2015-05-11T10:24:16Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![fasf\_safas](https://avatars.discourse-cdn.com/v4/letter/f/f05b48/32.png) [@fasf\_safas](https://community.zeek.org/u/fasf_safas)\
**Post date:** [May 11, 2015, 10:24am UTC](https://community.zeek.org/t/on-conn-log/3589/1 "2015-05-11T10:24:16Z")

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Hi,

sometimes the field “service duration” in conn.log is void: why?

Thanks

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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, 3:42pm UTC](https://community.zeek.org/t/on-conn-log/3589/2 "2022-05-06T15:42:39Z")

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