Few questions on locking down eFa on CentOS 8

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viper407
Posts: 25
Joined: 09 Mar 2022 09:55

Few questions on locking down eFa on CentOS 8

Post by viper407 »

Good evening

Thank you for taking the time to view my message. Please can you answer the below if possible?

A) Can i turn on the firewall on CentOS 8? Will it break anything?
$ sudo systemctl start firewalld
$ sudo systemctl enable firewalld

B) Can i secure the password files?
$ sudo chattr +i /etc/passwd
$ sudo chattr +i /etc/shadow

C) I checked the forums and you mentioned some time ago about adding spam assassin spoof plugin. Is this active now? How do i add it and enable it?

Kind regards
Edward
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shawniverson
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Joined: 13 Jan 2014 23:30
Location: Indianapolis, Indiana USA
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Re: Few questions on locking down eFa on CentOS 8

Post by shawniverson »

A) Yes, just make sure you allow at least tcp ports 22,25,80,443,587 where needed.

B) Yes, that should be fine.

C) FromNameSpoof? You can enable that plugin in /etc/mail/spamassassin/v342.pre.
viper407
Posts: 25
Joined: 09 Mar 2022 09:55

Re: Few questions on locking down eFa on CentOS 8

Post by viper407 »

Thanks for the response Shawn :D

I configured point A and B and see the line in that file for spam assassin was already uncommented. All running well.

Kind Regards
Edward
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