Curl SSL handshake issue

I’m trying to install connector on my hosts where 10 instances Ubuntu 20.04 LTS

curl: (35) OpenSSL SSL_connect: Connection reset by peer in connection to

I try install to all machines and change the network then again run same issue.

All distros are up to date. Firewall rules are open for 30000 to 31000 and 443 via TCP

Have any update?
I think have issue from binaries domain side

I’m assuming you’re running this command:

curl ""

and that it’s failing on the curl bit. If so, that’s an issue with your machines.

A few things to try:

  • Update curl
  • Ensure that your machines time is synchronized by following these steps
  • Look at the output of openssl s_client -connect -servername to see what failures may be occurring in the TLS handshake.

One more thing: you only need to install at least 1 Connector per remote network. If all of your machines are on the same network and can reach each other, you only need a single Connector.

Yes I updated the curl from the github latest version with build into my machines.


no peer certificate available

No client certificate CA names sent

SSL handshake has read 0 bytes and written 313 bytes

Verification: OK

New, (NONE), Cipher is (NONE)

Secure Renegotiation IS NOT supported

Compression: NONE

Expansion: NONE

No ALPN negotiated

Early data was not sent

Verify return code: 0 (ok)

This is output of openssl s_client -connect -servername

And I’m installed chrony successfully

chrony.service - chrony, an NTP client/server
Loaded: loaded (/lib/systemd/system/chrony.service; enabled; vendor preset: enabled)
Active: active (running) since Wed 2023-05-31 16:13:17 UTC; 2min 35s ago

Same issue

When installing connector curl: (35) Recv failure: Connection reset by peer

Could you provide the output of curl -v ""?

  • Trying…


  • Connected to ( port 443 (#0)

  • ALPN, offering h2

  • ALPN, offering http/1.1

  • successfully set certificate verify locations:

  • CAfile: /etc/ssl/certs/ca-certificates.crt

CApath: /etc/ssl/certs

  • TLSv1.3 (OUT), TLS handshake, Client hello (1):

  • OpenSSL SSL_connect: Connection reset by peer in connection to

  • Closing connection 0

curl: (35) OpenSSL SSL_connect: Connection reset by peer in connection to

@alexb Have any update?

Gotcha - there’s not too much more info there than the original curl command.

I suspect the problem is on your end. The site works on all of the machines I’ve tested it on. It seems like your machine isn’t able to complete the TLS handshake, and I’m not sure of what the exact reason could be.

Some things to try:

  • See if you can create TLS connections on other sites, e.g. or
  • Update openssl

Thank you I’ll test again.