STS regional endpoint in multiple regions fails on establishing connection

Question

in the past few months, a lot of regions are failing on establishing connection to regional sts endpoint using .Net nuget AWSSDK.RDS 3.7.314.1.
For example East Asia , Switzerland North, South Africa West.
lately at 27/8 at 15:03:33 all the request to sts.af-south-1.amazonaws.com:443 failed on System.Net.Http.HttpRequestException: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond. 
and the accounts to establish the connection in have South Africa West enabled. 
Can you please advise?

Gary Mclean · Answer

By default all the regions you have listed are disabled by default and you have to opt in.
Please check the AWS account has those regions enabled using the link below

https://us-east-1.console.aws.amazon.com/billing/home?region=us-east-1#/account?AWS-Regions

sahar · Answer

Hi, Any update on this?
the account has all these regions enabled and opt in, and the endpoint sometimes works

STS regional endpoint in multiple regions fails on establishing connection

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