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Linux - Security

Linux - Security This forum is for all security related questions.
Questions, tips, system compromises, firewalls, etc. are all included here.

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Rating Thread / Thread Starter	Last Post	Replies	Views
Sticky: Failed SSH login attempts ( 1 2 3 ) Capt_Caveman	01-03-2006 03:22 PM by unSpawn	38	227,896
Sticky: Security references unSpawn	02-25-2006 01:04 AM by unSpawn	6	242,133
Sticky: The OWASP Top 10 for 2013 unSpawn	06-15-2013 05:42 AM by unSpawn	0	18,086
Sticky: Alert (TA16-250A) The Increasing Threat to Network Infrastructure Devices and Recommended Mitigations tronayne	09-07-2016 06:25 AM by tronayne	0	13,328
Sticky: If you infected by any of these recent ELF malware cases please contact us? ( 1 2 ) malwaremustdie	04-22-2019 10:06 PM by malwaremustdie	21	40,752
Sticky: More Alerts Alert (TA14-017A) UDP-Based Amplification Attacks (Revised 12 Apr 2016) tronayne	07-14-2020 10:32 AM by RickDeckard	2	30,780
Ubuntu security vs Linux Mint security? ( 1 2 ) Gregory.Opera	05-14-2019 06:37 PM by cynwulf	22	4,826
easy-rsa building CA takes a short time mirek_adept	05-14-2019 10:26 PM by ntubski	1	719
Patching Solution for Small Lab daviddon	05-15-2019 08:53 AM by hydrurga	2	584
SQLMAP fails to fingerprint a DBMS llee4131	05-15-2019 03:44 PM by llee4131	0	1,777
[SOLVED] Encryption within Encryption MC Reddy	05-16-2019 07:40 AM by MC Reddy	3	833
Patching infrastructure daviddon	05-16-2019 12:01 PM by hydrurga	12	842
Nginx Authentication yash1990	05-17-2019 06:14 AM by tyler2016	8	3,803
[SOLVED] Restrict sshd to login only ( 1 2 3 ) jca002	05-18-2019 10:30 AM by Turbocapitalist	35	1,796
What does line "testuser ALL = NOPASSWD: /usr/sbin/smartctl" indicate ? vbmade2000	05-20-2019 04:18 PM by petelq	2	618
Restrict RDP User LeeMChildress	05-21-2019 09:33 AM by TB0ne	1	1,148
Disallow users to mount usb flash drives or HDD FBorges22	05-22-2019 09:50 AM by FBorges22	3	1,652
How to selectively block browser scripts starkid	05-22-2019 06:51 PM by hydrurga	1	603
Modsecurity nginx keep blocking /phpmyadmin/index.php newbie14	05-23-2019 06:03 AM by newbie14	13	3,787
unable to remote login with ssh rolandbro	05-23-2019 09:36 PM by drillsar	8	1,348
Failed to start User Manager for UID xxxxx. rufa	05-24-2019 03:06 AM by marciano-es	4	14,350
How to prevent polkit and authentication failure further ( 1 2 ) newbie14	05-25-2019 11:16 AM by newbie14	20	9,124
Fail2ban not picking settings newbie14	05-25-2019 12:07 PM by newbie14	13	1,268
[SOLVED] Alpine on a Laptop anon033	05-28-2019 03:21 AM by jsbjsb001	11	1,223
[SOLVED] IPTABLES log to file any input traffic mackowiakp	05-31-2019 02:23 PM by astrogeek	9	1,643
Nginx and modsecurity logs not appearing in daily logwatch output. newbie14	06-02-2019 11:23 PM by newbie14	8	1,346
First time SSH login not asking for password and logging in and creating home directories. witchkinkofangmar	06-03-2019 09:57 AM by witchkinkofangmar	4	1,685
gpg / gpg-agent -- Can't connect to /root/.gnupg/S.gpg-agent jrtayloriv	06-03-2019 10:06 AM by MensaWater	9	140,675
Connections (secure-log) Begin shows phpmyadmin user denied newbie14	06-04-2019 10:04 AM by newbie14	9	1,625
[SOLVED] LUKS Encryption is slow after moving disk to an older computer upnort	06-05-2019 12:23 PM by upnort	4	2,091
Why I can not see "selinux" module with "lsmod" command? -Snake-	06-09-2019 02:50 AM by -Snake-	3	1,092
Ansible Unlock Accounts elalexluna83	06-09-2019 04:31 PM by vincix	4	3,387
What to do with old/expired SSL Cert(s)? Latitude	06-09-2019 06:32 PM by RickDeckard	2	735
which one is executed first ip_forward=1 or iptables FORWARD Drop abd_bela	06-13-2019 04:10 PM by vincix	2	645
[SOLVED] I changed the root password, but the password for software updates is still the old one triplemaya	06-13-2019 07:33 PM by evo2	4	722
Allow only traffic from Whonix-Gateway cerber	06-14-2019 09:45 PM by cerber	0	1,035
LXDM/LXDE Logging Bad Usernames chrisr710	06-15-2019 06:45 PM by chrisr710	0	897
[SOLVED] command not allowed TTY=unknown wat	06-18-2019 06:11 AM by hazel	2	13,960
[SOLVED] Could you advise some useful tools for penetration testing? ( 1 2 ) RyanTmps	06-18-2019 03:32 PM by sevendogsbsd	16	1,480
detecting rootkits Debian w/ XFCE desktop armchairrambo	06-22-2019 06:36 AM by moxieman99	2	828
Info please actinide	06-28-2019 04:34 AM by JJJCR	3	932
[SOLVED] Weird netstat output ( 1 2 ) jazzy_mood	06-29-2019 01:12 PM by jazzy_mood	22	2,792
Allow specific command to run without password Domarius	06-29-2019 04:05 PM by Domarius	3	653
[SOLVED] /etc/hosts block lists anon033	06-30-2019 02:48 AM by ondoho	5	806
How to remotely backup and administer over the net without compromising security? ( 1 2 ) Doug Hutcheson	06-30-2019 09:16 AM by TB0ne	22	1,459
Best VPN 2019 ( 1 2 ) carlito386	07-01-2019 04:23 AM by michaelxxl	27	2,196
/etc/shadow file has been modified MALDATA	07-01-2019 09:42 AM by ehartman	9	3,444
How pam authentication works with ssh keys ? paraggupta1989	07-03-2019 11:58 PM by Turbocapitalist	3	9,059
DDOS Deflate ov4n	07-04-2019 03:50 AM by TenTenths	3	1,036
Orbot for Linux Mint seenab	07-04-2019 06:05 PM by battlestationX	9	6,274
Keep getting permission denied for nginx server on Centos 7 newbie14	07-05-2019 06:01 PM by BarryQualp	4	3,878
Content Security Header? drillsar	07-08-2019 07:26 PM by berndbausch	1	675
Why crash certbot-auto after creating virtual environment ? fussel55	07-09-2019 12:33 AM by bathory	1	799
MDS Zombieload protection on Ubuntu vincix	07-09-2019 05:12 AM by vincix	2	1,429
Is fail2ban useful on servers which only use SSH keys? Mark_667	07-12-2019 06:18 AM by wpeckham	4	3,046
[SOLVED] SELinux sandbox problem with GUI app _alex_	07-12-2019 02:04 PM by _alex_	4	1,019

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