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Bug #19896

Updated by Peter Amstutz over 1 year ago

User is unable to log in on their cluster, getting this error: 

 > LDAP Result Code 200 "Network Error": TLS handshake failed (tls: server selected unsupported protocol version 301) 

 They have reported that the server only supports TLS 1.1 and that the IT department intends to upgrade but has not done so yet. 

 What happened between Arvados 2.4 and 2.5 is that the Go TLS client got more strict by default -- documented here https://go.dev/doc/go1.18#tls10 

 We should provide an option (off by default) to relax the TLS version check. 

 h2. Workaround 

 The short term fix is to set "GODEBUG=tls10default=1" in "/etc/arvados/environment".    We should add this to release notes. 

 

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