Simple Postfix Hardening

ADD TO  /etc/postfix/ vi /etc/postfix/   # Hardening SSL configuration# # enable opportunistic TLS support in the SMTP server and clientsmtp_tls_security_level = maysmtp_tls_loglevel = 1 # only offer authentication after STARTTLSsmtpd_tls_auth_only = yes # Disable SSL compressiontls_ssl_options = NO_COMPRESSION # Disable SSLv2 and SSLv3 leaving TLSv1, TLSv1.1 and TLSv1.2 enabled.smtpd_tls_mandatory_protocols = !SSLv2, !SSLv3smtpd_tls_protocols = !SSLv2 Read more about Simple Postfix Hardening[…]

Remount a read only file system – Linux

I had an issue that occured when a FSCK scan was forced but then failed with a memory shortage issue – To get the OS back up and running and my services i did this (i will run the fsck again but i needed a server back in production) #mount -o remount,rw \ #init 1; Read more about Remount a read only file system – Linux[…]