I'm installing MonetDB as per the instructions at [1], but Homebrew says the SSL peer handshake fails:
$ brew install monetdb
==> Downloading https://dev.monetdb.org/downloads/sources/Jan2014-SP3/MonetDB-11.17.21.zip
curl: (35) SSL peer handshake failed, the server most likely requires a client certificate to connect
Error: Failed to download resource "monetdb"
Download failed: https://dev.monetdb.org/downloads/sources/Jan2014-SP3/MonetDB-11.17.21.zip
The problem arose because I had not updated Homebrew after an upgrade to MacOS Yosemite. After running
brew update
everything works. Should have thought of that before posting my question, sorry!