Port 443 for https is open, as usual. Is also as default configurated in CSF. So, if there are problems, this will be due to a different cause than ssl. Probably the domain in question is blocked, or this server is blocked on the other side. Please let me know to which url they are trying to connect?
I doubt your server has been blocked by LinkedIn, though it's possible if it's on a shared IP and there's another site that has been very abusive toward their servers. That's unlikely though.Failed to connect to www.linkedin.com port 443: Connection timed out
We support the CurlSSL and not the regular Curl. Could that be the problem?
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