Linux - SecurityThis forum is for all security related questions.
Questions, tips, system compromises, firewalls, etc. are all included here.
Notices
Welcome to LinuxQuestions.org, a friendly and active Linux Community.
You are currently viewing LQ as a guest. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Registration is quick, simple and absolutely free. Join our community today!
Note that registered members see fewer ads, and ContentLink is completely disabled once you log in.
If you have any problems with the registration process or your account login, please contact us. If you need to reset your password, click here.
Having a problem logging in? Please visit this page to clear all LQ-related cookies.
Get a virtual cloud desktop with the Linux distro that you want in less than five minutes with Shells! With over 10 pre-installed distros to choose from, the worry-free installation life is here! Whether you are a digital nomad or just looking for flexibility, Shells can put your Linux machine on the device that you want to use.
Exclusive for LQ members, get up to 45% off per month. Click here for more info.
Could be possible to block root access via ssh for an user account or an IP address after give three times a wrong password ? I mean, if an intruder gain access via an user account and try to get root access.
Could be this possible ?
Regards.
Last edited by jfmendez27; 09-10-2003 at 11:15 AM.
I'm sure it's somehow possible using PAM, but root should not be allowed to use any form of networked login, period. Use proper methods like setting up sudo and logging in as unprivileged user.
If you allow only certain users ssh access, then use sshd_config's "AllowUsers" directive to restrict access. If you allow only certain users ssh access and you know their IP addresses or ranges, then you can restrict access to those using /etc/hosts.deny,allow if OpenSSH is compiled --with-libwrap or use (x)inetd's facilities if you run sshd tru (x)inetd. To finalize it and to guard against configuration errors being single point of failures, add those addresses and ranges to your firewall script.
LinuxQuestions.org is looking for people interested in writing
Editorials, Articles, Reviews, and more. If you'd like to contribute
content, let us know.