Postfix PCI Compliance in ZCS: Difference between revisions

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{{BC|Community Sandbox}}
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=Postfix PCI Compilance in Zimbra Collaboration=
{{KB|{{Unsupported}}|{{ZCS 8.6}}|{{ZCS 8.5}}|{{ZCS 8.0}}|}}
{{WIP}}
==Reconfigure the Postfix SSL/TLS settings==


=Working towards PCI Compliance for Zimbra 5.0.x=
===Configuring Postfix for PCI Compliance===


===Reconfigure the Postfix SSL/TLS settings===
Reference - http://www.postfix.org/TLS_README.html


1.  Make a backup of /opt/zimbra/postfix/conf/main.cf in case you need to rollback or refer to after an upgrade.
====For ZCS 8.5, as the '''zimbra''' user====
zmprov mcf zimbraMtaSmtpdTlsCiphers high
zmprov mcf zimbraMtaSmtpdTlsProtocols '!SSLv2,!SSLv3'
  zmprov mcf zimbraMtaSmtpdTlsMandatoryCiphers high
zmprov mcf zimbraMtaSmtpdTlsExcludeCiphers 'aNULL,MD5,DES'


2. Log in as root in the command line utility. Switch to the zimbra user account.
Within 2 minutes, zmconfigd will update postfix for you, and the system will be PCI compliant.


su - zimbra
====For ZCS 8.0 and previous, as the '''zimbra''' user====


3. Type the following commands:
zmlocalconfig -e smtpd_tls_ciphers=high
postconf -e smtpd_tls_protocols=\!SSLv3,\!SSLv2
zmlocalconfig -e smtpd_tls_mandatory_ciphers=high
postconf -e smtpd_tls_exclude_ciphers=aNULL,MD5,DES


  postconf -e smtpd_tls_mandatory_protocols="SSLv3, TLSv1"
The SSL/TLS settings are now reconfigured. The changes will take effect within 2 minutes. Note that '''smtpd_tls_protocols''' and '''smtpd_tls_exclude_ciphers''' will need to be set after every upgrade as there is no way to preserve them in ZCS 8.0 and previous.
  postconf -e smtpd_tls_mandatory_ciphers="medium, high"


The SSL/TLS settings are now reconfigured. The changes will take effect immediately.
{{Article Footer|ZCS 7.2.0|11/30/2013}}


4. To ensure that your changes are not overwritten by a future Zimbra upgrade, you can set them in the local config.
[[Category: SSL/TLS]]
 
[[Category: ZCS 7.0]]
zmlocalconfig -e smtpd_tls_mandatory_protocols="SSLv3, TLSv1"
[[Category: ZCS 8.0]]
zmlocalconfig -e smtpd_tls_mandatory_ciphers="medium, high"
[[Category: ZCS 8.5]]

Latest revision as of 20:22, 12 July 2015

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  3. Postfix PCI Compliance in ZCS

Postfix PCI Compilance in Zimbra Collaboration

   KB 3123        Last updated on 2015-07-12  




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Reconfigure the Postfix SSL/TLS settings

Configuring Postfix for PCI Compliance

Reference - http://www.postfix.org/TLS_README.html

For ZCS 8.5, as the zimbra user

zmprov mcf zimbraMtaSmtpdTlsCiphers high
zmprov mcf zimbraMtaSmtpdTlsProtocols '!SSLv2,!SSLv3'
zmprov mcf zimbraMtaSmtpdTlsMandatoryCiphers high
zmprov mcf zimbraMtaSmtpdTlsExcludeCiphers 'aNULL,MD5,DES'

Within 2 minutes, zmconfigd will update postfix for you, and the system will be PCI compliant.

For ZCS 8.0 and previous, as the zimbra user

zmlocalconfig -e smtpd_tls_ciphers=high
postconf -e smtpd_tls_protocols=\!SSLv3,\!SSLv2
zmlocalconfig -e smtpd_tls_mandatory_ciphers=high
postconf -e smtpd_tls_exclude_ciphers=aNULL,MD5,DES

The SSL/TLS settings are now reconfigured. The changes will take effect within 2 minutes. Note that smtpd_tls_protocols and smtpd_tls_exclude_ciphers will need to be set after every upgrade as there is no way to preserve them in ZCS 8.0 and previous.

Verified Against: ZCS 7.2.0 Date Created: 11/30/2013
Article ID: https://wiki.zimbra.com/index.php?title=Postfix_PCI_Compliance_in_ZCS Date Modified: 2015-07-12



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