On Sun, 17 Feb 2013 15:27:46 +0000 courier-users-requ...@lists.sourceforge.net wrote:
> 差出人: Sam Varshavchik <mr...@courier-mta.com> > 宛先: courier-users@lists.sourceforge.net > 件名: Re: [courier-users] SSL error > 日付: Sun, 17 Feb 2013 10:25:49 -0500 > > Bernd Plagge writes: > > > Hi, > > > > I found the following error message in the system log: > > > > Courier-ssl: accept error 1408A0C1 SSL routines: SSL_GET_CLIENT_HELLO: no > > shared cipher > > > > What is the reason for this error message? Is it serious? What can/should I > > > > do to get rid of it? > > This means that the sender failed to negotiate TLS because no shared ciphers > were in common. Each time an encrypted connections gets established between > two parties, they have to agree on a common encryption parameters. > > When Courier is built against OpenSSL (default), the OpenSSL configuration > is controlled by TLS_CIPHER_LIST, if Courier is built against GnuTLS, it > comes from TLS_PRIORITY. > > Most likely, you're using the default configuration which disables low- > security ciphers, and the other side can only do low-security ciphers, hence > there was no common cipher. Sam, thanks for the explanation. I'll leave the default then; looks fine to me.
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