security

I want to mount a firewall. I have the idea of that my traffic could be "sniffered" by somebody. So I will ask for how to mount a firewall, here, on my desktop installation but also on another equipment. Besides, I want to know what else can I do for making the most miserable the attack of a...

Hi, new audit-requirements came up (yeah EU-GDPR and its requirement for acccountability who did when what when dealing with personal data) and now I try to figure out, how I can log what the root-user is doing, especially when an admin is doing sudo su. As I noticed certain commands like "cd"...

I write this with the objective of talk about security and viruses in FreeBSD. Once i read in a page about this OS the steps for installing an antivirus. Since that i started to think: how much security this system have? But, if we consider that this system could be configurable to be more...

Using databases/memcached is a popular method to speed up high performance websites. But apparently not everybody protects it properly and allows it to be accessible from the internet. New research discovered these open services are abused in a similar fashion to DNS and NTP amplification...

I am looking for a debugger or disassembler for Windows PE format executables, something similar to objdump. I'm taking a class in computer forensics and the research project that my team is working on is reverse engineering malware. We have the malware (it's not hard to find). For obvious...

Good evening, I'm experiencing something which is making me doubting completely about my understanding of compartments through BIBA and MLS models. I've used colours and bold style in the attempt to make the following grade:compartments declarations more readable. I'm working in /home/shared #...

EDIT: the problem is solved Hello, i had used Debian at the last several years and i'm very new to FreeBSD. I tryed to port my configuration for fail2ban from my Debian machines to FreeBSD (with the modification due the firewall has changed). In my testing phase i have found out that the...

So, we've all accepted the "many eyes" theory of open source, and we assume that those eyes find many defects and fix them, hence increasing security. But, inside of many very important security sectors (especially in the U.S.) - that line of reasoning is said not to work. To paraphrase a few...

I want to wrote a 2 factor authentication script that runs after PAM authentication that texts my phone a random 6 digit number and waits for 60 seconds for me to type in the result... I have it all basically writen in my head, but I cannot for the life of me find any literature as to where to...

Intel Bug Incoming. EDIT: It seems sh!t will get pretty serious: Intel's CEO Just Sold a Lot of Stock UPDATE: 'Kernel memory leaking' Intel processor design flaw forces Linux, Windows redesign

Hi All, I've been trying to change umask of a local user. I've looked around for instructions, and tried adding umask in .login_conf in user's home directory. me:\ :umask=002: Also ran cap_mkdb .login_conf after modification. umask remains 022, unchanged. In addition, I've changed...

According to our third-party PCI scanner (conducted by Trustwave) current OpenSSH version is no longer supported. The version of OpenSSH detected is no longer supported by the vendor. No further security patches or upgrades will be released by the vendor for this version, and the vendor will...

I am running FreeBSD 11.1-RELEASE-p1 with a customized kernel (NAT compiled into it). I have setup ssmtp to send me the daily, weekly etc reports and over the past few days I have been receiving a strange error in the security run output. Checking setuid files and devices: Checking negative...

Hello Everyone: The audit system in FreeBSD currently support auditing by user id only. Is it possible to support auditing by folder(I just wanna to audit specific folder,whoever access it)?? Thanks anyway!!

So I noticed that the Linux Binary compatibility use the Kernel 2.x which is pretty old and it has a lot of known vulnerabilities. Is it still safe if we run it on FreeBSD or will it be not secure to have it?

So here's my scenario. * I have a home server (HostB) which is completely within my control. * I have an off-site machine that can potentially be physically accessed by other people I don't trust (HostA). I want to do off-site backups (encrypted of course) via `duplicity` from HostB to...

Hi everyone, not sure if I'm in the right forum area, so maybe a mod wants to move this. Is it possible to 'track' actions that are done in a jail where an sshd server is running and offering root access (so of course no root access directly in the sshd, but after login su/sudo is possible)...

Hello, I found in the eMail of "daily security run output" today: changes in mounted filesystems: --- /var/log/mount.today 2016-05-14 03:03:55.000000000 +0200 +++ /tmp/security.aYjsnqDE 2016-11-29 03:04:45.000000000 +0100 ..and downstairs kernel log messages: +++...

Hey folks, I'm in progress of migrating my centos openvpn dualstack server to freebsd. I got a problem with ipv6 connection and im not shure what is the problem. IPv4 is working fine through the tunnel. IPv6 icmp is possible, but nameservers are not reachable on :53 or anything else except via...

Hi, despite reading and re-reading the manual, I have an extremely hard time understanding how to keep my FreeBSD host and my FreeBSD jails secure. I am going to try to express my current understanding of FreeBSD as maybe the problem is that I don't understand it. There seems to be on one...