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Auto mqtt Port Block

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We have a service which use mqtt for most of its data communication Many clients with different public IPs connect to it Sometime during peak hours, some of our clients acess is blocked

  • The block occurs in such a way that only mqtt ports are blocked other all ports are working fine The block is automatically removed after 2 hours, by then total traffic of mqtt also settles down I have checked mqtt server/service software for any issues as well updated the software, open connection to the service is also at max. Does AWS automatically block IPs eventhough I have not enabled any firewall like services in AWS ?
Topics
Networking & Content DeliveryAWS Well-Architected Framework
Tags
Networking & Content DeliverySecurity
Language
English
asked 3 years ago425 views
1 Answer
1
Accepted Answer

I don't think there is any automatic blocking unless you are using services like network ACLs or security groups.
The VPC flow logs should be checked as a way to investigate the error.
In addition to that, if there are network-related CloudWatch metrics, etc., it would also be useful to check for suspicious activity.
Also, if it is possible to obtain logs on the MQTT server side, it would be a good idea to check those logs.

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answered 3 years ago

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