Basic Linux Configurations
- 1. Version 1.01 I. P. N. EDMONDS 1 BASIC LINUX SYSTEM CONFIGURATIONS IMPORTANT NOTICE - Paths may vary depending on Linux Operating Systems (OS) used and version of application - I am not entirely responsible for any misconfigurations on your system - Linux Operating Systems (OS) used include OpenSuSe, CentOS and Ubuntu - It is assumed that the core Operating System has been installed with necessary dependencies - Some steps may have been skipped or ignored, and network configurations are not party - Below are not all the configurations you might have to make eMail Server using Postfix, Dovecot and Squirrelmail Focus is on Postfix and Dovecot POSTFIX (SMTP) File Name / Path = /etc/postfix/main.cf ## Fields to Add mydomain = # mydomain = domain myorigin = $mydomain mynetworks = IPClass/24, 127.0.0.0/8 ## Fields to Edit myhostname = test.domain # myhostname = servername.domain mydestination = $myhostname, localhost.$mydomain, $mydomain smtpd_sender_restrictions = hash:/etc/postfix/access, reject_unknown_sender_domain, permit_mynetworks, permit # Anti-SPAM smtpd_helo_required = yes disable_vrfy_command = yes strict_rfc821_envelopes = yes
- 2. Version 1.01 I. P. N. EDMONDS 2 invalid_hostname_reject_code = 554 multi_recipient_bounce_reject_code = 554 non_fqdn_reject_code = 554 relay_domains_reject_code = 554 unknown_address_reject_code = 554 unknown_client_reject_code = 554 unknown_hostname_reject_code = 554 unknown_local_recipient_reject_code = 554 unknown_relay_recipient_reject_code = 554 unknown_virtual_alias_reject_code = 554 unknown_virtual_mailbox_reject_code = 554 unverified_recipient_reject_code = 554 unverified_sender_reject_code = 554 smtpd_recipient_restrictions = reject_invalid_hostname, reject_unknown_recipient_domain, reject_unauth_pipelining, permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination, reject_rbl_client sbl-xbl.spamhaus.org, reject_rbl_client dnsbl.sorbs.net, reject_rbl_client cbl.abuseat.org, permit mailbox_size_limit = # Size always in bytes (1000 bytes = 1KB) message_size_limit = # Size always in bytes (1000 bytes = 1KB)
- 3. Version 1.01 I. P. N. EDMONDS 3 Dovecot (POP3 & IMAP) Edits N.B: Associated edits seem to have changed a lot with the latest versions based on an installation with RoundCube in July 2015 running on Ubuntu File Name / Path = /etc/dovecot/dovecot.conf protocols = pop3 pop3s imap imaps ssl_disable = yes login_greeting = "Your Custom Message Goes Here" # Under "protocol imap" mail_plugin_dir = /usr/local/lib/dovecot/imap # End IMAP # Under "protocol pop3" pop3_uidl_format = %08Xu%08Xv mail_plugin_dir = /usr/local/lib/dovecot/pop3 # End POP3 # Under "protocal lda" mail_plugin_dir = /usr/local/lib/dovecot/lda # End LDA ### Comment = Adding "#" ## Comment "passdb pam" & the corresponding closing bracket ## Un-comment "passdb passwd" & corresponding closing bracket ## Un-comment "passdb shadow" & corresponding closing bracket # Create user and group "dovecot" # cp /etc/local/sbin/dovecot to /etc/init.d/ # Edit /etc/init.d/boot.local and add "/etc/init.d/dovecot &" The following is not necessarily related to eMail Server Configurations CRONTAB The Syntax #minute hour day of month month day of week command Sample Crontab: - To automatically reboot a server at 20:15 hrs everyday with 5 minute server warnings 15 20 * * * /sbin/shutdown -r +5
- 4. Version 1.01 I. P. N. EDMONDS 4 Web Development Adding a password protected page into another page … <?php $curl = curl_init(); curl_setopt($curl, CURLOPT_URL, "http://full.path/to.page"); curl_setopt($curl, CURLOPT_HTTPAUTH, CURLAUTH_BASIC ) ; curl_setopt($curl, CURLOPT_USERPWD, "USERNAME:PASSWORD"); curl_exec($curl); curl_close($curl); ?> This is my very first PUBLIC / INTERNET resource sharing. Constructive suggestions are welcome. Depending on my schedules and knowledge, I am able to offer basic and administrative assistance* to specific queries on Squid, Zimbra Open Source Edition, Shoreline Firewall, hotspot software among others from installation to customization / configuration. Sharing all the raw data as related might be very confusing. Thank you.