2015-05-15 19:58:44 -05:00
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# Upgrade iRedMail from 0.9.1 to 0.9.2
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[TOC]
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## ChangeLog
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2015-05-16 20:56:21 -05:00
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> We provide remote upgrade service, check [the price](../support.html) and [contact us](../contact.html).
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2015-05-15 19:58:44 -05:00
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* 2015-05-16: [OPTIONAL][All backends] Update one Fail2ban filter regular expressio to help catch DoS attacks to SMTP service
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## General (All backends should apply these steps)
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### [OPTIONAL] Update one Fail2ban filter regular expressio to help catch DoS attacks to SMTP service
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1. Open file `/etc/fail2ban/filters.d/postfix.iredmail.conf` or
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`/usr/local/etc/fail2ban/filters.d/postfix.iredmail.conf` (on FreeBSD), find
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below line under `[Definition]` section:
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```
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lost connection after AUTH from (.*)\[<HOST>\]
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```
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Update above line to below one:
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```
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lost connection after (AUTH|UNKNOWN|EHLO) from (.*)\[<HOST>\]
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```
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Restarting Fail2ban service is required.
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