On 20.10.2016 15:41, Arkadiusz Miśkiewicz wrote: > On Thursday 20 of October 2016, Aki Tuomi wrote: >> On 18.10.2016 14:16, Arkadiusz Miśkiewicz wrote: >>> On Monday 17 of October 2016, KT Walrus wrote: >>>>> On Oct 17, 2016, at 2:41 AM, Arkadiusz Miśkiewicz <ar...@maven.pl> >>>>> wrote: >>>>> >>>>> On Monday 30 of May 2016, Arkadiusz Miśkiewicz wrote: >>>>>> Is there a way to log SNI hostname used in TLS session? Info is there >>>>>> in SSL_CTX_set_tlsext_servername_callback, dovecot copies it to >>>>>> ssl_io->host. >>>>>> >>>>>> Unfortunately I don't see it expanded to any variables ( >>>>>> http://wiki.dovecot.org/Variables ). Please consider this to be a >>>>>> feature request. >>>>>> >>>>>> The goal is to be able to see which hostname client used like: >>>>>> >>>>>> May 30 08:21:19 xxx dovecot: pop3-login: Login: user=<abc>, >>>>>> method=PLAIN, rip=1.1.1.1, lip=2.2.2.2, mpid=17135, TLS, >>>>>> SNI=pop3.somehost.org, session=<hfS9Qwk03sBTBnrN> >>>>> Dear dovecot team, would be possible to add such variable ^^^^^ ? >>>>> >>>>> That would be neat feature because server operator would know what >>>>> hostname client uses to connect to server (which is really usefull in >>>>> case of many hostnames pointing to single IP). >>>> I’d love to be able to use this SNI domain name in the Dovecot IMAP >>>> proxy for use in the SQL password_query. This would allow the proxy to >>>> support multiple IMAP server domains each with their own set of users. >>>> And, it would save me money by using only the IP of the proxy for all >>>> the IMAP server domains instead of giving each domain a unique IP. >>> It only needs to be carefuly implemented on dovecot side as TLS SNI >>> hostname is information passed directly by client. >>> >>> So some fqdn name validation would need to happen in case if client has >>> malicious intents. >>> >>>> Kevin >> Hi! >> >> I wonder if this would be of any help? It provides %{local_name} >> passdb/userdb variable, you can use it for some logging too... >> >> https://github.com/dovecot/core/commit/fe791e96fdf796f7d8997ee0515b163dc5ed >> dd72 > Should it work for such usage, too? > > login_log_format_elements = user=<%u> method=%m rip=%r lip=%l mpid=%e > local_name=%{local_name} %c session=<%{session}> > > Because I'm not getting local_name logged at all (dovecot -a shows its there). > >> Aki > Thanks,
How did you try? With openssl you need to use openssl s_client -connect ... -servername something Aki
