Below is the output of curl -V
pi@raspberrypi:~ $ curl -V
curl 7.52.1 (arm-unknown-linux-gnueabihf) libcurl/7.52.1 OpenSSL/1.0.2l zlib/1.2.8 libidn2/0.16 libpsl/0.17.0 (+libidn2/0.16) libssh2/1.7.0 nghttp2/1.18.1 librtmp/2.3
Protocols: dict file ftp ftps gopher http https imap imaps ldap ldaps pop3 pop3s rtmp rtsp scp sftp smb smbs smtp smtps telnet tftp
Features: AsynchDNS IDN IPv6 Largefile GSS-API Kerberos SPNEGO NTLM NTLM_WB SSL libz TLS-SRP HTTP2 UnixSockets HTTPS-proxy PSL
EDIT: The version of curl on my working Pi-Hole install with Jessie is curl 7.38.0
Could this be the culprit?
Here is the result of curl -1v4SL https://install.pi-hole.net | bash
pi@raspberrypi:~ $ curl -1v4SL https://install.pi-hole.net | bash
* Rebuilt URL to: https://install.pi-hole.net/
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0* Trying 45.76.128.97...
* TCP_NODELAY set
* Connected to install.pi-hole.net (45.76.128.97) port 443 (#0)
* ALPN, offering h2
* ALPN, offering http/1.1
* Cipher selection: ALL:!EXPORT:!EXPORT40:!EXPORT56:!aNULL:!LOW:!RC4:@STRENGTH
* successfully set certificate verify locations:
* CAfile: /etc/ssl/certs/ca-certificates.crt
CApath: /etc/ssl/certs
* TLSv1.2 (OUT), TLS header, Certificate Status (22):
} [5 bytes data]
* TLSv1.2 (OUT), TLS handshake, Client hello (1):
} [512 bytes data]
0 0 0 0 0 0 0 0 --:--:-- 0:00:02 --:--:-- 0* TLSv1.2 (IN), TLS handshake, Server hello (2):
{ [107 bytes data]
* TLSv1.2 (IN), TLS handshake, Certificate (11):
{ [2553 bytes data]
* TLSv1.2 (IN), TLS handshake, Server key exchange (12):
{ [179 bytes data]
* TLSv1.2 (IN), TLS handshake, Server finished (14):
{ [4 bytes data]
* TLSv1.2 (OUT), TLS handshake, Client key exchange (16):
} [70 bytes data]
* TLSv1.2 (OUT), TLS change cipher, Client hello (1):
} [1 bytes data]
* TLSv1.2 (OUT), TLS handshake, Finished (20):
} [16 bytes data]
0 0 0 0 0 0 0 0 --:--:-- 0:00:03 --:--:-- 0* TLSv1.2 (IN), TLS change cipher, Client hello (1):
{ [1 bytes data]
* TLSv1.2 (IN), TLS handshake, Finished (20):
{ [16 bytes data]
* SSL connection using TLSv1.2 / ECDHE-ECDSA-AES256-GCM-SHA384
* ALPN, server accepted to use h2
* Server certificate:
* subject: CN=pi-hole.net
* start date: Feb 21 19:36:11 2018 GMT
* expire date: May 22 19:36:11 2018 GMT
* subjectAltName: host "install.pi-hole.net" matched cert's "install.pi-hole.net"
* issuer: C=US; O=Let's Encrypt; CN=Let's Encrypt Authority X3
* SSL certificate verify ok.
* Using HTTP2, server supports multi-use
* Connection state changed (HTTP/2 confirmed)
* Copying HTTP/2 data in stream buffer to connection buffer after upgrade: len=0
} [5 bytes data]
* Using Stream ID: 1 (easy handle 0x2005e48)
} [5 bytes data]
> GET / HTTP/1.1
> Host: install.pi-hole.net
> User-Agent: curl/7.52.1
> Accept: */*
>
{ [5 bytes data]
* Connection state changed (MAX_CONCURRENT_STREAMS updated)!
} [5 bytes data]
< HTTP/2 301
< server: nginx/1.12.2
< date: Thu, 10 May 2018 22:51:36 GMT
< content-type: text/html
< content-length: 185
< location: https://raw.githubusercontent.com/pi-hole/pi-hole/master/automated%20install/basic-install.sh
< strict-transport-security: max-age=31536000; includeSubDomains
< x-xss-protection: 1; mode=block
< x-content-type-options: nosniff
< referrer-policy: strict-origin
<
* Ignoring the response-body
{ [185 bytes data]
* Curl_http_done: called premature == 0
100 185 100 185 0 0 53 0 0:00:03 0:00:03 --:--:-- 53
* Connection #0 to host install.pi-hole.net left intact
* Issue another request to this URL: 'https://raw.githubusercontent.com/pi-hole/pi-hole/master/automated%20install/basic-install.sh'
* Trying 151.101.0.133...
* TCP_NODELAY set
* Connected to raw.githubusercontent.com (151.101.0.133) port 443 (#1)
* ALPN, offering h2
* ALPN, offering http/1.1
* Cipher selection: ALL:!EXPORT:!EXPORT40:!EXPORT56:!aNULL:!LOW:!RC4:@STRENGTH
* successfully set certificate verify locations:
* CAfile: /etc/ssl/certs/ca-certificates.crt
CApath: /etc/ssl/certs
* TLSv1.2 (OUT), TLS header, Certificate Status (22):
} [5 bytes data]
* TLSv1.2 (OUT), TLS handshake, Client hello (1):
} [512 bytes data]
0 0 0 0 0 0 0 0 --:--:-- 0:05:03 --:--:-- 0* Operation timed out after 300795 milliseconds with 0 out of 0 bytes received
* Curl_http_done: called premature == 1
* stopped the pause stream!
0 0 0 0 0 0 0 0 --:--:-- 0:05:04 --:--:-- 0
* Closing connection 1
curl: (28) Operation timed out after 300795 milliseconds with 0 out of 0 bytes received
