Search found 1777 matches

by L. Mark Stone
Mon Jul 15, 2019 5:28 pm
Forum: Administrators
Topic: web interface logout errors
Replies: 6
Views: 312

Re: web interface logout errors

What do you mean by "local rules have ports specified..."

What "local rules"?

Mark
by L. Mark Stone
Mon Jul 15, 2019 1:27 pm
Forum: Administrators
Topic: web interface logout errors
Replies: 6
Views: 312

Re: web interface logout errors

Hi Mark ! We do have NAT setup and private subnet systems can run updates. Access lists are open as per zimbra specifications. Not sure why we get this errors. So you configured a NAT Gateway for the mailbox servers in the Private subnet? What are you doing for private DNS resolution? What inter-se...
by L. Mark Stone
Mon Jul 15, 2019 12:29 pm
Forum: Administrators
Topic: OWASP P13 and P4 removing css display attribute
Replies: 5
Views: 466

Re: OWASP P13 and P4 removing css display attribute

rickaotc wrote:I'm surprised there's a p4 and not zcs 8.8.15, supposedly to be released July 1 -

https://www.zimbra.com/support/support- ... lifecycle/


At this writing, it looks like July 19 for 8.8.15's release, and then Patch 1 ten days later.

Hope that helps,
Mark
by L. Mark Stone
Mon Jul 15, 2019 11:02 am
Forum: Administrators
Topic: Admin account lockout
Replies: 3
Views: 60

Re: Admin account lockout

The bad actors know Zimbra sets the default admin account as “admin@...” and will brute force it all day long. The trick is either to create a global admin account that is named something a little cryptic, or, you can configure DoSFilter to block the bad actor’s IP address before your password locko...
by L. Mark Stone
Mon Jul 15, 2019 10:58 am
Forum: Administrators
Topic: Antivirus ClamAV zimbra 8.8.x
Replies: 3
Views: 227

Re: Antivirus ClamAV zimbra 8.8.x

Yes, malicious links inside emails sent from otherwise well-configured email servers are a big problem. Either or both of the uribl and invaluement lists in my blog post will help greatly. Although it is not supported, many use the invaluement list for right hand side blocking outright as well. Doin...
by L. Mark Stone
Fri Jul 12, 2019 2:56 pm
Forum: Administrators
Topic: web interface logout errors
Replies: 6
Views: 312

Re: web interface logout errors

I am running aws setup with many zimbra servers. All mailbox and ldap server are on private subnet and proxy and mta on public subnet. Have a very wired issue and not sure how to troubleshoot. All works fine but when logging out of web interface we get ???remote.CONNECT_FAILURE??? Error. And also w...
by L. Mark Stone
Fri Jul 12, 2019 2:53 pm
Forum: Administrators
Topic: Antivirus ClamAV zimbra 8.8.x
Replies: 3
Views: 227

Re: Antivirus ClamAV zimbra 8.8.x

Hello everyone, the zimbra antivirus does not work well. lets pass many emails with malicious links inside. The same version of ClamAv on postfix works well and blocks the email that zimbra passes. does anyone have any ideas or solutions? Thanks in advance. Perhaps my AntiSpam Best Practices Guide ...
by L. Mark Stone
Wed Jul 10, 2019 3:03 pm
Forum: Installation and Upgrade
Topic: 8.8.12 Multiserver Installation
Replies: 6
Views: 368

Re: 8.8.12 Multiserver Installation

Dear All, Please, I have some questions and would like if any one can give me a hand. I am currently doing an installation of a Zimbra 8.6.14 to 8.8.12. 1. Would you recommend RedHat or CentOS? 2. Which is the best way to migrate the data from the old (8.6.14) to the new server (8.8.12)? 3. I am do...
by L. Mark Stone
Tue Jul 02, 2019 3:31 pm
Forum: Zimbra Connector for Outlook
Topic: Zimbra Connector asking for updated version of Outlook
Replies: 0
Views: 436

Re: Zimbra Connector asking for updated version of Outlook

Which version of ZCO are you trying to install? What is the Zimbra server version? The latest versions of ZCO for each version of Zimbra server may be downloaded from here: https://www.zimbra.com/downloads/zimbra-connector-for-outlook/ . You can run a newer version of the Zimbra Server than you have...
by L. Mark Stone
Tue Jul 02, 2019 3:26 pm
Forum: Administrators
Topic: Unable to disable PLAIN login
Replies: 4
Views: 619

Re: Unable to disable PLAIN login

George, Two things: First 8.8.7 is long past end of life and has a known security exposure to a bitcoin mining exploit. You should upgrade to 8.8.12 (or 8.8.15, due out soon) with urgency, at your earliest opportunity. More about that here: https://forums.zimbra.org/viewtopic.php?t=65932 Second, the...

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