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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: More Alerts Alert (TA14-017A) UDP-Based Amplification Attacks (Revised 12 Apr 2016) tronayne	07-14-2020 10:32 AM by RickDeckard	2	30,791
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	40,801
Sticky: Alert (TA16-250A) The Increasing Threat to Network Infrastructure Devices and Recommended Mitigations tronayne	09-07-2016 06:25 AM by tronayne	0	13,338
Sticky: The OWASP Top 10 for 2013 unSpawn	06-15-2013 05:42 AM by unSpawn	0	18,094
Sticky: Security references unSpawn	02-25-2006 01:04 AM by unSpawn	6	242,206
Sticky: Failed SSH login attempts ( 1 2 3 ) Capt_Caveman	01-03-2006 03:22 PM by unSpawn	38	227,978
iptables and OUTPUT policy Jason.nix	02-21-2024 12:16 PM by jayjwa	8	267
[SOLVED] Iptables maddy0	02-17-2024 12:13 PM by maddy0	3	224
[SOLVED] Why should all ports be closed? Jason.nix	02-17-2024 12:37 AM by Michael Uplawski	6	278
iptables and a list of addresses Jason.nix	02-14-2024 11:57 AM by Jason.nix	7	302
Generate new SSH Host keys crypto7541	02-09-2024 05:03 AM by Turbocapitalist	3	183
Is this free pdf book of using Suricata as a ips/ids a legit one? //////	02-08-2024 10:10 AM by //////	11	250
My Server got Hacked? - sshd root access? hannso	02-08-2024 01:40 AM by Peter_APIIT	12	544
Snort loopback interface results, can anyone tell me or explain it better, I know it looks suspicious and i am hacked rightnow45	02-08-2024 01:33 AM by Peter_APIIT	4	237
Hardening steps of Linux Jason.nix	02-08-2024 01:31 AM by Peter_APIIT	10	476
BruteForce Attaack vuthanhtu	02-08-2024 01:29 AM by Peter_APIIT	2	241
Solution for CVE paol	02-06-2024 06:44 PM by TB0ne	3	239
Linux Ubuntu Zorin 17 OS - Install ClamAV via APT on Ubuntu - Error Message Hylton	02-02-2024 11:54 AM by business_kid	1	223
[SOLVED] Understanding permissions needed to mv directory (using Posix ACLs) swami77	02-01-2024 03:07 AM by lvm_	1	161
Create pw randomly use binary file source tidahot	01-31-2024 02:59 PM by Michael Uplawski	7	223
[SOLVED] Golang and vulnerability Jason.nix	01-31-2024 01:51 AM by Jason.nix	2	145
rsh authentication failure farhadka	01-29-2024 10:44 AM by jayjwa	8	890
[SOLVED] Undetectable VPN ( 1 2 ) Jason.nix	01-28-2024 03:52 PM by yvesjv	26	489
Help against a UDP flood attack Rirre	01-25-2024 11:39 AM by Rirre	10	476
Whonix or Kodachi? Novatian	01-24-2024 08:16 AM by Novatian	3	302
Encrypting Email Sent to Automated Services (non-PGP?) starkid	01-17-2024 07:56 PM by sundialsvcs	9	291
/etc/issue.net print out a warning message to sshed users & log their ip englishexe	01-15-2024 11:41 AM by jayjwa	3	172
[nftables] how to use blocklist.txt file as a source for blacklisted ip-addresses ? //////	01-13-2024 07:33 AM by //////	2	641
PAM module's pam_echo messages are printed twice on console shootmadbeka	01-11-2024 11:44 AM by shootmadbeka	0	96
Kswapd0 process is using an incredibly high amount of CPU usage friv	01-11-2024 02:13 AM by lesebas	9	7,730
Are these rules really useful? Jason.nix	01-04-2024 07:53 AM by zeebra	14	420
[SOLVED] Scalper worm discovered Habitual	12-31-2023 11:40 AM by sag47	5	3,567
Guys how do I close these open ports? All I have is a mobile service and spectrum Internet. Theo1968	12-23-2023 01:20 PM by Aeterna	6	346
NFtbles maddy0	12-22-2023 01:59 PM by maddy0	4	257
Directory file size change ( 1 2 ) compis	12-20-2023 06:47 PM by michaelk	22	683
set as default setcap 'cap_net_raw,cap_net_admin+eip' Harvat	12-19-2023 08:45 AM by Harvat	0	336
Using rsyslog on Debian to store firewall logs - issues with logrotate motwane	12-14-2023 03:41 PM by boughtonp	1	178
iptable config - DNS not working anymore clmsvie	12-12-2023 07:09 AM by zeebra	3	224
[SOLVED] 550 sender unauthenticated mfoley	11-27-2023 04:06 PM by bathory	5	447
How to change Linux version fakely? Jason.nix	11-26-2023 07:45 AM by goldennuggets	8	304
make offline iptables rule stick after reboot chrisknight	11-24-2023 11:28 AM by chrisknight	4	217
How do i get rid of the Google Login Window mickeyboa	11-22-2023 03:51 PM by bitfuzzy	4	218
[SOLVED] Firefox can't access https://lists.opensuse.org/ MakeTopSite	11-07-2023 07:08 AM by MakeTopSite	7	246
Get notification if the FW is turned off B612	10-29-2023 10:37 AM by TB0ne	1	203
Unable to change Furqan10	10-26-2023 03:49 AM by yancek	2	223
Full disk-encryption question lester29	10-24-2023 05:04 AM by Turbocapitalist	2	248
Firefox pop-up blocker being selective tomiki	10-23-2023 10:06 PM by tomiki	3	180
iptables connlimit-mark question kenw232	10-20-2023 11:11 PM by Person_1873	6	201
[SOLVED] allow users to execute a Python File but not read JJJCR	10-19-2023 08:42 PM by JJJCR	7	320
[SOLVED] Citrix Workspaces: Is the citrixlog Account a Security Concern? DiyLiberty	10-18-2023 10:07 PM by DiyLiberty	1	240
Cannot disable root login / Slackware Linux 15.0 HytronBG	10-18-2023 01:22 PM by metaed	9	409
Delete sendmail mail queue Pedroski	10-18-2023 12:06 AM by Pedroski	2	366
Best certs or courses for Linux Security? quiero424	10-16-2023 08:01 PM by sag47	6	230
Terrible security hole Tuesday today biker_rat	10-14-2023 12:38 PM by pan64	11	436
Suricata-IDS in AF_PACKET IPS mode Jason.nix	10-14-2023 04:32 AM by Jason.nix	8	640
Can I block internet access for almost everything? lucmove	10-09-2023 04:28 PM by remmilou	4	210

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