# TCP traffic limited - Zero windows

**URL:** <https://discuss.elastic.co/t/tcp-traffic-limited-zero-windows/357293>\
**Category:** Logstash\
**Created:** [April 12, 2024, 1:14pm UTC](https://discuss.elastic.co/t/tcp-traffic-limited-zero-windows/357293 "2024-04-12T13:14:45Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![SilasMuniz1](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/silasmuniz1/32/108267_2.png) [@SilasMuniz1](https://discuss.elastic.co/u/SilasMuniz1)\
**Post date:** [April 12, 2024, 1:14pm UTC](https://discuss.elastic.co/t/tcp-traffic-limited-zero-windows/357293/1 "2024-04-12T13:14:45Z")

</div>

Hi everyone,

I had a scenario that I've segmented endpoint traffic in multiple TCP ports. Whether I use only one port I receive zerowin error and delay to input log at elasticsearch.

When occour high traffic happening error, when traffic decrease normalyze.

I use load balance front of 2 logstash.

Is there limit of connections or traffic for TCP port?