Search found 83 matches

by zimico
Tue Dec 11, 2018 5:44 pm
Forum: Administrators
Topic: Revamped Zimbra live sync stuff
Replies: 3
Views: 267

Re: Revamped Zimbra live sync stuff

Thank maxxer for your kind contribution.
Regards.
by zimico
Sat Dec 01, 2018 1:15 am
Forum: Installation and Upgrade
Topic: installation problems centos 7.5
Replies: 6
Views: 799

Re: installation problems centos 7.5

Did you disable selinux?
Regards.
by zimico
Sat Nov 03, 2018 2:38 pm
Forum: Administrators
Topic: Cant shake bruteforce monkey
Replies: 13
Views: 1741

Re: Cant shake bruteforce monkey

Hi Mark, I have tested zimbra dosfilter with lower threshold and fail login policy. Dosfilter recoginzed bad ip but the account was still locked out. Could you show me your current configuration. Regards, Minh. Just did a blog post on this: https://www.missioncriticalemail.com/2018/10/19/using-zimb...
by zimico
Sat Oct 20, 2018 1:29 am
Forum: Administrators
Topic: Cant shake bruteforce monkey
Replies: 13
Views: 1741

Re: Cant shake bruteforce monkey

Hi Mark,
I have tested zimbra dosfilter with lower threshold and fail login policy. Dosfilter recoginzed bad ip but the account was still locked out.
Could you show me your current configuration.
Regards,
Minh.
by zimico
Tue Oct 16, 2018 1:15 pm
Forum: Administrators
Topic: Zimbra 8.8.9 and Cbpolicyd
Replies: 14
Views: 2390

Re: Zimbra 8.8.9 and Cbpolicyd

As I know, Policyd is out of Zimbra support's scope...
Regards,
by zimico
Tue Oct 02, 2018 1:10 pm
Forum: Administrators
Topic: Brute force attack & SPAM configuration
Replies: 20
Views: 10086

Re: Brute force attack & SPAM configuration

One strategy here is to configure account lockout policies such that DoSFilter (or fail2ban) starts throttling/blocking requests before the mailbox is locked out. In that way, a legitimate remote user will not be locked out by a hacker doing a fast-paced dictionary attack. Hope that helps, Mark I t...
by zimico
Mon Oct 01, 2018 1:49 pm
Forum: Administrators
Topic: Brute force attack & SPAM configuration
Replies: 20
Views: 10086

Re: Brute force attack & SPAM configuration

How do you know that hacker is using more than one million IPs?
Regards,
by zimico
Fri Sep 21, 2018 1:27 pm
Forum: Installation and Upgrade
Topic: Zimbra for Production environment recommendation
Replies: 3
Views: 424

Re: Zimbra for Production environment recommendation

You can use physical or virtual server. Docker/container is not supported at the present. There is wiki about server sizing and requirement for zimbra installation.

Regards,
by zimico
Thu Sep 20, 2018 2:58 am
Forum: Administrators
Topic: Account compromised impossibile to stop spam
Replies: 17
Views: 1071

Re: Account compromised impossibile to stop spam

I think you should not allow whole subnet, change to, for example: zmprov ms `zmhostname` zimbraMtaMyNetworks '127.0.0.0/8 192.168.5.1/32 192.168.5.3/32' postfix reload Use firewall to block smtp port on Web server. In my experience, do not allow web server having email server function. Regards.
by zimico
Tue Sep 18, 2018 5:04 am
Forum: Administrators
Topic: certbot-zimbra 0.4 released
Replies: 7
Views: 635

Re: certbot-zimbra 0.4 released

Hi Maxxer,
I do not see which are zimbra versions supported by this certbot-zimbra 4.0. I have just tested on Zimbra NE (trial) 8.8.9 but failed.
Regards.

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