nexus 3.2.1 uses httpclient 4.5.2
There are lots of issues fixed in 4.5.3. Some SSL related issues may be affecting our users.
There are even more (verified) issues in 4.5.3 (see comments below). Waiting for 4.5.4 now.
NEXUS-9640 infinite timeout on sockets performing CONNECT tunneling through a HTTP Proxy server
NEXUS-12488 remote https repository with TLS client certificate loaded in NXRM JVM keystore not trusted
- links to