Generic Linux server setup

Things to do on all servers:

Log management

awslogs

• /var/log/auth.log
• /var/log/mail.log
• /var/log/syslog

move cron off to its own log

• /etc/rsyslog.d/50-default.conf

*.*;auth,authpriv.none,cron.none   -/var/log/syslog
cron.*                             /var/log/cron.log

get rid of cron in auth.log

• /etc/pam.d/common-session-noninteractive, at end of file

# and here are more per-package modules (the "Additional" block)
session [success=1 default=ignore] pam_succeed_if.so service in cron quiet use_uid
session	required	pam_unix.so

Other

mail through SES relay

• /etc/postfix/main.cf

## AWS

relayhost = [email-smtp.us-east-1.amazonaws.com]:25
smtp_sasl_auth_enable = yes
smtp_sasl_security_options = noanonymous
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
smtp_use_tls = yes
smtp_tls_security_level = encrypt
smtp_tls_note_starttls_offer = yes
smtp_tls_CAfile = /etc/ssl/certs/ca-certificates.crt

fail2ban

• do