Dovecot imap-login: Disconnected: Input buffer full

dear community,
anyone tried to setup a goldentriangle AD / OD with kerberos?
this is especially in respect to dovecot login.
settings done as in HT4778
It fails with "dovecot imap-login: Disconnected: Input buffer full"
there is a known issue, where the input buffer is filled up with the (ad) kerberos ticket and fails, as it is too small.
kinit is fine, tgt for imap is there.....
can anyone confirm this issue?
best
hartmut

ok, what a pain, login is CASE-SENSITIVE ! So take care what username you take!
hope it helps someone else....
It can also throw strange numbers and letters when trying to login!
best
Hartmut

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[Solved] Dovecot imap-login fails

I have been working on this for hours and I have little idea what is wrong. I have dovecot setup to authenticate via PAM. I am sure that the PAM authentication is correct as a wrong password returns a bad auth error. However, when the initial authentication happens it feels like PAM isn't returning my UID.
Config:
protocols = imap
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Apr 30 21:43:39 example.org dovecot[20497]: auth: Debug: Loading modules from directory: /usr/lib/dovecot/modules/auth
Apr 30 21:43:39 example.org dovecot[20497]: auth: Debug: Read auth token secret from /var/run/dovecot/auth-token-secret.dat
Apr 30 21:43:39 example.org dovecot[20497]: auth: Debug: auth client connected (pid=20500)
Apr 30 21:43:40 example.org dovecot[20497]: auth: Debug: client in: AUTH 1 PLAIN service=imap secured session=gbQRcUn41gDH1CFX lip=192.168.1.1 rip=172.16.1.1 lport=993 rport=35286 resp=<hidden>
Apr 30 21:43:40 example.org dovecot[20497]: auth-worker(20503): Debug: Loading modules from directory: /usr/lib/dovecot/modules/auth
Apr 30 21:43:40 example.org dovecot[20497]: auth-worker(20503): Debug: pam(myusername,172.16.1.1): lookup service=dovecot
Apr 30 21:43:40 example.org dovecot[20497]: auth-worker(20503): Debug: pam(myusername,172.16.1.1): #1/1 style=1 msg=Password:
Apr 30 21:43:40 example.org dovecot[20497]: auth: Debug: client passdb out: OK 1 user=myusername
Apr 30 21:43:40 example.org dovecot[20497]: auth: Debug: master in: REQUEST 158597121 20500 1 8026dcae28bb986805dfea459a9879da session_pid=20504 request_auth_token
Apr 30 21:43:40 example.org dovecot[20497]: auth: Debug: master userdb out: USER 158597121 myusername auth_token=de32f97064bc1c4215b205d41ad36fd9eb8d466a
Apr 30 21:43:40 example.org dovecot[20497]: imap-login: Login: user=<myusername>, method=PLAIN, rip=172.16.1.1, lip=192.168.1.1, mpid=20504, TLS, session=<gbQRcUn41gDH1CFX>
Apr 30 21:43:40 example.org dovecot[20497]: imap(keller): Error: user myusername: Couldn't drop privileges: User is missing UID (see mail_uid setting)
Apr 30 21:43:40 example.org dovecot[20497]: imap(keller): Error: Internal error occurred. Refer to server log for more information.
/ect/pam.d/dovecot
auth required pam_unix.so nullok
account required pam_unix.so
Solution: Authentication is not authorization! I didn't have a userdb setup.
Added to /ect/dovecot/dovecot.conf
userdb {
driver = passwd
Last edited by Nycroth (2014-04-30 22:34:45)

ok, what a pain, login is CASE-SENSITIVE ! So take care what username you take!
hope it helps someone else....
It can also throw strange numbers and letters when trying to login!
best
Hartmut

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National Instruments

Dovecot imap-login: Disconnected: Input buffer full

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