Search found 5 matches

by juan_urtiaga
Thu Aug 22, 2019 4:08 pm
Forum: Administrators
Topic: SELinux enabled
Replies: 7
Views: 2578

Re: SELinux enabled

Hello, In my opinion generally enable Selinux is relative easy but.... to be sure everything else working after is not. And Zimbra is not the exception. First you should enable selinux and restart the server. Depending on your filesystem it can take several minutes to selinux label every file. Now y...
by juan_urtiaga
Mon Aug 19, 2019 6:17 pm
Forum: Administrators
Topic: Disable Auth in port 25 (Not MUA)
Replies: 7
Views: 2977

Re: Disable Auth in port 25 (Not MUA)

Mark, Phoenix: Thanks again for your time. I´ve already deployed fail2ban in the MTA host but not all the attacks are filtered. And yes, modifing the postfix files is not a good practise, actually I´ve lost the configuration in the last update. Finally I will try to tune the fail2ban to reduce the a...
by juan_urtiaga
Fri Aug 16, 2019 3:15 pm
Forum: Administrators
Topic: Disable Auth in port 25 (Not MUA)
Replies: 7
Views: 2977

Re: Disable Auth in port 25 (Not MUA)

Hi Mark! Thank you for your answer. Ok, the basic problem is we have malicious attempts of autentication at port 25. It seems like bots are trying to send mails from our true accounts, after a cuple of attemps the accounts get locked in my LDAP server (out of zimbra). So under this circuntances , co...
by juan_urtiaga
Thu Aug 15, 2019 5:48 pm
Forum: Administrators
Topic: Disable Auth in port 25 (Not MUA)
Replies: 7
Views: 2977

Re: Disable Auth in port 25 (Not MUA)

Hello, I have Zimbra 8.8.12_GA_3794.RHEL6_64_20190329045002 and like @ImNotET want to use port 25 for only for incoming and outgoing mails. And ports 465/587 for smtps and submission services to allow clients to authenticate and forward mails. I tried the configuration suggested by @DualBoot but the...
by juan_urtiaga
Mon Jan 23, 2017 8:16 pm
Forum: Administrators
Topic: Configure SMTP on port 25 only to recieve mails from servers
Replies: 1
Views: 849

Configure SMTP on port 25 only to recieve mails from servers

Hello, I have some mallicious authentications attemps over real accounts on my Zimbra Server. After 5 failed authentications the accounts are blocked and the attack is unsucceessfull but the real user remains blocked. I´ve implemented the fail2ban over smtp with the sas events I could not filter all...

Go to advanced search