Search found 22 matches

by MartinsBonders
Tue Dec 20, 2016 12:31 pm
Forum: Administrators
Topic: Outlook 2016 and ZCS 8.6.0
Replies: 2
Views: 3810

Outlook 2016 and ZCS 8.6.0

We have strange problem. We have Outlook 2016 configured with IMAP, when you open Outlook, everything is working fine, but after some 4-6 hours something is going wrong. Send and Receiving stop on 50% and no errors. Just status bar show send and receiving 50% and that all, this message can stay a co...
by MartinsBonders
Wed Oct 19, 2016 11:56 am
Forum: Administrators
Topic: How to protect Zimbra against postfix AUTH DoS attacks
Replies: 12
Views: 6777

Re: How to protect Zimbra against postfix AUTH DoS attacks

Thank you, this looks very good!~:) Here is is the zimbra.conf file we use (in addition to some of the other jail conf files that come with fail2ban...) root@mail:/etc/fail2ban/filter.d# cat zimbra.conf # Fail2Ban configuration file # # Author: # # $Revision: 1 $ # [Definition] # Option: failregex #...
by MartinsBonders
Fri Oct 14, 2016 1:23 pm
Forum: Administrators
Topic: How to protect Zimbra against postfix AUTH DoS attacks
Replies: 12
Views: 6777

Re: How to protect Zimbra against postfix AUTH DoS attacks

Is there some approved manual how to setup Zimbra + fail2ban? Because forum have some pieces of configs.
by MartinsBonders
Fri Oct 14, 2016 7:49 am
Forum: Administrators
Topic: How to protect Zimbra against postfix AUTH DoS attacks
Replies: 12
Views: 6777

How to protect Zimbra against postfix AUTH DoS attacks

Hello! What would be the best way to protect Zimbra 8.6 from postfix AUTH DoS attacks? Like this: Oct 19 06:30:49 mail postfix/smtpd[14043]: connect from unknown[151.237.190.118] Oct 19 06:30:49 mail postfix/smtpd[14043]: lost connection after AUTH from unknown[151.237.190.118] Oct 19 06:30:49 mail ...
by MartinsBonders
Tue Aug 09, 2016 12:09 pm
Forum: Administrators
Topic: Zimbra Monitoring
Replies: 4
Views: 2950

Re: Zimbra Monitoring

Any Zabbix example? :shock:
by MartinsBonders
Mon Aug 01, 2016 11:18 am
Forum: Administrators
Topic: Zimbra Monitoring
Replies: 4
Views: 2950

Re: Zimbra Monitoring

Does anybody use Zabbix as monitoring system?
I have standard template for Linux and Zimbra server, maybe there are some good Zimbra custom zabbix template with good graphs?
by MartinsBonders
Mon Aug 01, 2016 11:14 am
Forum: Administrators
Topic: MTA exception or whitelist
Replies: 4
Views: 869

Re: MTA exception or whitelist

phoenix wrote:You're not actually giving much information about what you're doing, are you using port 587 or port 25 or something else?


Yes, i am using 587 port with authentification.
by MartinsBonders
Mon Aug 01, 2016 10:53 am
Forum: Administrators
Topic: MTA exception or whitelist
Replies: 4
Views: 869

Re: MTA exception or whitelist

If you're sending alerts to your mail server (from an external monitor server) then you should submit those emails vai the Submission port 587, that will also require authentication. I get such error: Warning: XXX does not resolve to address ZZZ: Name or service not known : connect from unknown[ZZZ...
by MartinsBonders
Mon Aug 01, 2016 8:16 am
Forum: Administrators
Topic: MTA exception or whitelist
Replies: 4
Views: 869

MTA exception or whitelist

Hello! I have Zimbra 8.6 and I have enabled such MTA settings: 1. Sender address must be fully qualified 2. DNS checks: Client's IP 3. DNS checks: Hostname in greeting I am trying to send Zabbix alerts from external server with public IP and I logically get error: cannot find your hostname. Is there...
by MartinsBonders
Thu Jun 02, 2016 2:34 pm
Forum: Administrators
Topic: Zimbra high load problem
Replies: 1
Views: 1093

Zimbra high load problem

I have strange overload problem. I have Zimbra/8.6.0_GA_1194, most of time load is very good, about 0.5 (we use Ubuntu 14.04) But then load come to 5-7 and server totally freezes, we all use IMAP and we cannot send emails. I get errors like: ERROR [ImapSSLServer-4840] [ip=x.x.x.x;oip=x.x.x.x;via=x.x...

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