Hello *, I've the following problem with dovecot 1.0.7:
/var/log/messages shows
| Dec 13 13:48:27 mailbox kernel: possible SYN flooding on port 143. Sending cookies.
and /var/log/maillog shows (Please note: nearly the same time):
| Dec 13 13:48:28 mailbox dovecot: pipe() failed: Too many open files
This leads to an unresponsive mail service and requires a dovecot restart. What can be done to prevent this?
BTW, this is my dovecot -n:
# 1.0.7: /usr/local/dovecot/etc/dovecot.conf base_dir: /var/run/dovecot/ protocols: imap imaps pop3 pop3s ssl_cert_file: /usr/local/dovecot/etc/mailbox.pem ssl_key_file: /usr/local/dovecot/etc/mailbox.key disable_plaintext_auth: no login_dir: /var/run/dovecot//login login_executable(default): /usr/local/dovecot/libexec/dovecot/imap-login login_executable(imap): /usr/local/dovecot/libexec/dovecot/imap-login login_executable(pop3): /usr/local/dovecot/libexec/dovecot/pop3-login login_greeting: TU-Berlin.DE POP3-/IMAP Service ready login_log_format_elements: %u %r %c login_processes_count: 24 login_max_processes_count: 512 verbose_proctitle: yes mail_location: maildir:/var/Mail/Boxes/%1u/%u mailbox_idle_check_interval: 15 maildir_copy_with_hardlinks: yes maildir_copy_preserve_filename: yes mail_executable(default): /usr/local/dovecot/libexec/dovecot/imap mail_executable(imap): /usr/local/dovecot/libexec/dovecot/imap mail_executable(pop3): /usr/local/dovecot/libexec/dovecot/pop3 mail_plugins(default): quota imap_quota mail_plugins(imap): quota imap_quota mail_plugins(pop3): quota mail_plugin_dir(default): /usr/local/dovecot/lib/dovecot/imap mail_plugin_dir(imap): /usr/local/dovecot/lib/dovecot/imap mail_plugin_dir(pop3): /usr/local/dovecot/lib/dovecot/pop3 mail_log_prefix: %Ls(%u): imap_client_workarounds(default): delay-newmail outlook-idle netscape-eoh tb-extra-mailbox-sep imap_client_workarounds(imap): delay-newmail outlook-idle netscape-eoh tb-extra-mailbox-sep imap_client_workarounds(pop3): outlook-idle pop3_uidl_format(default): pop3_uidl_format(imap): pop3_uidl_format(pop3): %08Xu%08Xv pop3_client_workarounds(default): pop3_client_workarounds(imap): pop3_client_workarounds(pop3): outlook-no-nuls oe-ns-eoh auth default: mechanisms: plain login anonymous count: 32 passdb: driver: ldap args: /usr/local/dovecot/etc/dovecot-ldap.conf userdb: driver: static args: uid=777 gid=12 plugin: quota: maildir:ignore=Trash
Kind regards ______________________________________________________________ Frank Elsner / c/o Technische Universitaet Berlin | ____________/ tubIT [BD], Sekr. E-N 50 | | Einsteinufer 17 | | Phone: +49 30 314 23897 D-10587 Berlin | | eMail: Frank.Elsner@TU-Berlin.DE Germany __________________| |_________________________________________________________| in dubio pro exim