Why can't I fetch this sites contents with curl?

I'm trying to download the contents of https://aarhustech.itslearning.com/elogin/default.aspx with curl, but I get this error:

$ curl https://aarhustech.itslearning.com/elogin/default.aspx
curl: (35) Unknown SSL protocol error in connection to aarhustech.itslearning.com:443

It doesn't matter if I make an insecure SSL connection with the -k option or specify the user-agent with -A 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_4) AppleWebKit/537.1 (KHTML, like Gecko) Chrome/21.0.1162.0 Safari/537.1'.

It isn't even possible to get the headers, how do I fix this?

Trace output:

== Info: About to connect() to aarhustech.itslearning.com port 443 (#0)
== Info:   Trying 158.36.191.141...
== Info: connected
== Info: Connected to aarhustech.itslearning.com (158.36.191.141) port 443 (#0)
== Info: successfully set certificate verify locations:
== Info:   CAfile: /opt/local/share/curl/curl-ca-bundle.crt
  CApath: none
== Info: SSLv3, TLS handshake, Client hello (1):
=> Send SSL data, 348 bytes (0x15c)
0000: 01 00 01 58 03 03 4f cc bc 56 90 3b 93 ad 7a 6e ...X..O..V.;..zn
0010: ba 3c 8b 08 2d 12 da cf b6 1a a6 e0 e6 e6 da 0d .<..-...........
0020: f2 86 02 3c 46 46 00 00 a0 c0 30 c0 2c c0 28 c0 ...<FF....0.,.(.
0030: 24 c0 14 c0 0a c0 22 c0 21 00 a3 00 9f 00 6b 00 $.....".!.....k.
0040: 6a 00 39 00 38 00 88 00 87 c0 32 c0 2e c0 2a c0 j.9.8.....2...*.
0050: 26 c0 0f c0 05 00 9d 00 3d 00 35 00 84 c0 12 c0 &.......=.5.....
0060: 08 c0 1c c0 1b 00 16 00 13 c0 0d c0 03 00 0a c0 ................
0070: 2f c0 2b c0 27 c0 23 c0 13 c0 09 c0 1f c0 1e 00 /.+.'.#.........
0080: a2 00 9e 00 67 00 40 00 33 00 32 00 9a 00 99 00 ....g.@.3.2.....
0090: 45 00 44 c0 31 c0 2d c0 29 c0 25 c0 0e c0 04 00 E.D.1.-.).%.....
00a0: 9c 00 3c 00 2f 00 96 00 41 00 07 c0 11 c0 07 c0 ..<./...A.......
00b0: 0c c0 02 00 05 00 04 00 15 00 12 00 09 00 14 00 ................
00c0: 11 00 08 00 06 00 03 00 ff 02 01 00 00 8e 00 00 ................
00d0: 00 1f 00 1d 00 00 1a 61 61 72 68 75 73 74 65 63 .......aarhustec
00e0: 68 2e 69 74 73 6c 65 61 72 6e 69 6e 67 2e 63 6f h.itslearning.co
00f0: 6d 00 0b 00 04 03 00 01 02 00 0a 00 34 00 32 00 m...........4.2.
0100: 0e 00 0d 00 19 00 0b 00 0c 00 18 00 09 00 0a 00 ................
0110: 16 00 17 00 08 00 06 00 07 00 14 00 15 00 04 00 ................
0120: 05 00 12 00 13 00 01 00 02 00 03 00 0f 00 10 00 ................
0130: 11 00 0d 00 22 00 20 06 01 06 02 06 03 05 01 05 ....". .........
0140: 02 05 03 04 01 04 02 04 03 03 01 03 02 03 03 02 ................
0150: 01 02 02 02 03 01 01 00 0f 00 01 01             ............
== Info: Unknown SSL protocol error in connection to aarhustech.itslearning.com:443 
== Info: Closing connection #0

curl

Tyilo

Posted 2012-06-04T11:54:24.433

Reputation: 2 345

Do you have openssl installed? – Paul – 2012-06-04T12:29:09.827

@Paul yes I have – Tyilo – 2012-06-04T12:35:05.797

Can you run it with -v and --trace so we have more output? – Paul – 2012-06-04T13:13:21.940

Can you retrieve the page with wget? Did you try the -1, -2, and -3 switches to connect with different SSL versions? Worst case scenario, try downloading the site's certificate and explicitly passing it to cURL with the -E switch. – Synetech – 2012-06-04T18:38:38.043

@Synetech It worked with either -1 or -2 options. – Tyilo – 2012-06-04T18:49:45.080

Nice. I'll undelete my answer and update it to provide the correct information. – Synetech – 2012-06-04T19:00:37.593

Why can't I fetch this sites contents with curl?

Answers