01-01-2024 04:06 AM
Recently trying to debug a possible packet dropping issue at firewall (screenshot attached for reference). The issue is appearing when I try to make request to my server from my iOS device, some API calls works Ok but often few of those fails with 503 error code and this happens randomly against different APIs.
When I looked at the firewall the failed request packets appear in the packet capture but doesn't appear in the firewall traffic logs. I tried to filter the denied traffic but nothing appeared there.
The question is when packets are coming then how come those are not being served and transferred to the target server?
Can anyone share some more details to look into or any possible problem that is hampering the traffic? I see the retransmission packets for the failed request (see attachment).
