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Questions tagged [freebsd]

A free Unix-like operating system descended from Research Unix via the Berkeley Software Distribution (BSD).

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Do systemd-nspawn containers provide the same security guarantees as FreeBSD jails?

I am evaluating the systemd-nspawn containers security and would like to know if the systemd-nspawn containers provide the same security guarantees as FreeBSD jails? Specially, can an attacker escape ...
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1answer
87 views

How can I ensure higher levels of privacy when hosting others' emails?

I can set up my own email server, and quite happy with it, using standard open source components - postfix, roundcube, etc on top of HardenedBSD or OpenBSD. I'd like to offer the use of my email ...
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1answer
57 views

Is the traversal permission in a Unix filesystem exploitable by itself, in the absence of any other permissions/ACLs?

Scenario/question: A unix directory tree has NTFv4 ACLs configured to allow an unprivileged account traversal on all dirs (but no other ACL granting further rights on any file/dir anywhere In such a ...
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0answers
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Are BSD jails a “huge security liability”? [closed]

In this 2014 blog post from an apparently anti-BSD blog, the author criticizes BSD jails for being poorly designed and therefore insecure. The opening paragraph reads: If you’re thinking of ...
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1answer
121 views

mySQL into outfile strange behaviour

I have sql-injection with file_priv=Y (root user) but I can only create file in /tmp and /var/tmp directories even when i have 777 permissions to destination folder - mysql server just won't create ...
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0answers
524 views

How to use openssl ca with prime256v1?

I am new on encryptation world, and reading about this, mostly websites say to use the prime256v1 for better performance and security. After some days testing, finally I get my openssl CA structure ...
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1answer
2k views

Is BSD more secure than GNU/Linux? [closed]

BSD controls the OS while Linux is just a kernel. BSD is less popular than Linux, but which one is better in terms of security?
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1answer
2k views

Is receiving IPv4 connections on AF_INET6 sockets insecure?

The FreeBSD man page for inet6 has the following: By default, FreeBSD does not route IPv4 traffic to AF_INET6 sockets. The default behavior intentionally violates RFC2553 for security reasons. ...
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1answer
340 views

Do I need dedicated firewall? [closed]

I have two servers in the datacenter. FreeBSD <--> Windows Server FreeBSD configured as a gateway for Windows Server. What is the best: FreeBSD has only firewall. All services are on the Win ...
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2answers
1k views

Firewall egress filtering / quick whitelisting

Suppose your Aunt or Uncle is easily fooled by phishing attempts and their computer has multiple root kits and key loggers running. Assume their computing habits will never change. Looking at his ...
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2answers
1k views

How to hide or obfuscate the type of OS?

I get the OS type of a remote host by: connecting to an open port (telnet <host> 22); using Nmap (nmap -A <host>). What are techniques and how to hide or change the information about OS? ...
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1answer
1k views

How secure is OpenSSH on FreeBSD?

In a discussion about the recent OpenSSL information disclosure vulnerability, the subject of OpenSSH being vulnerable came up. While OpenSSH is not vulnerable due to the problem lying in the TLS ...