Can't connect to https on ubuntu

I can't seem to connect to a specific server over SSL from our Ubuntu servers. Locally, on my Mac, it works flawlessly.

The server address: powerschool.spokaneschools.org

curl -v https://powerschool.spokaneschools.org output:

• Rebuilt URL to: https://powerschool.spokaneschools.org/
• Hostname was NOT found in DNS cache
• Trying 206.193.1.72...
• Connected to powerschool.spokaneschools.org (206.193.1.72) port 443 (#0)
• successfully set certificate verify locations:
• CAfile: none CApath: /etc/ssl/certs
• SSLv3, TLS handshake, Client hello (1):
• Unknown SSL protocol error in connection to powerschool.spokaneschools.org:443
• Closing connection 0 curl: (35) Unknown SSL protocol error in connection to powerschool.spokaneschools.org:443

openssl s_client -connect powerschool.spokaneschools.org:443 output:

CONNECTED(00000003)
write:ero=104
---
no peer certificate available
---
No client certificate CA names sent
---
SSL handshake has read 0 bytes and written 0 bytes
---
New, (NONE), Cipher is (NONE)
Secure Renegotiation IS NOT supported
Compression: NONE
Expansion: NONE
SSL-Session:
    Protocol  : SSLv3
    Cipher    : 0000
    Session-ID: 
    Session-ID-ctx: 
    Master-Key: 
    Key-Arg   : None
    PSK identity: None
    PSK identity hint: None
    SRP useame: None
    Start Time: 1466726411
    Timeout   : 7200 (sec)
    Verify retu code: 0 (ok)
---

I tried checking the site in different SSL check tools, all seem to be OK (apart from some security issues). I have no issues connecting to other servers, even within that domain.

Recent Questions...