getting Winsock error 10061

[teddyidc1101]

We are forwarding logs to a UF->HF-> INDEXER setup for splunk but the logs are not getting thru.
We checked the splunkd log of HF and it has the error below:
01-08-2018 20:30:15.311 -0600 ERROR ApplicationUpdater - Error checking for update, URL=https://apps.splunk.com/api/apps:resolve/checkforupgrade: Winsock error 10061

What could be the possible issue on this?
Thanks!

[mayurr98]

I do not think this error is regarding the data
refer this link
https://answers.splunk.com/answers/172506/what-is-the-purpose-of-our-splunk-instance-phoning.html

It is something related to application update which you can disable