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No ACK on SYN on debian buster in the Cloud
Dear community,
I have a host (jenkins-builder) running in the Google Cloud Platform.
If I execute many HTTP requests to some external host, for instance, http://example.com - source host networking will be "blocked" for a certain time == 30 seconds.
I've captured traffic via tcpdump, and now I can see that there are no ACK packets during the "blocked" time: http://app.ep4sh.cc/paste/MLxciufIus
I do see multiple [S] but lack of [ACK] - I've double-checked the behavior on the neighbor hosts - there is no such issue on them. So in my opinion it's a particular host issue.
Could somebody suggest how to find out the root cause? I'm running on Debian buster. Thank you in advance!
No ACK on SYN on debian buster in the Cloud
Dear community,
I have a host (jenkins-builder) running in the Google Cloud Platform.GCP.
If I execute many HTTP http requests to some external host, for instance, http://example.com - source host networking will be "blocked" for a certain time == 30 seconds.secodns.
I've captured traffic via tcpdump, and now I can see that there are no NO ACK packets during the time "blocked" time:
http://app.ep4sh.cc/paste/MLxciufIus
I do see multiple [S] but lack of [ACK] - I've double-checked the behavior on the neighbor hosts - there is no such issue on them. So in my opinion it's a particular host issue.
Could somebody suggest how to find out the root cause? I'm running on Debian buster. Thank you in advance!