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Questions tagged [freebsd]

FreeBSD is an advanced operating system for a variety of architectures. It is derived from BSD, the version of UNIX® developed at the University of California, Berkeley; and is developed and maintained by a large team of individuals. It is a complete Operating System, including the kernel, drivers, and userland utilities such as shells.

FreeBSD includes many modern OS features including advanced IP stacks and networking, Virtualization, hardened security, and high availability techniques.
For more information about FreeBSD, see their website (FreeBSD.org).

Questions are welcome here on Server Fault, the Unix and Linux Stack Exchange or the FreeBSD Forums.

Additionally Wikipedia has en entry on FreeBSD and the original BSD OS.

1537 questions
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ZFS on enterprise RAID pass-through, and ZFS on FreeBSD root

We've been running ZFS on top of a single hardware RAID on dell poweredge for years. I know most people are against this, but the snapshot/clone, compression and flexible partition of ZFS served us very well. Whenever a drive dies, a dell…
John
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How do I spamtrap with Postfix?

How do I setup spamtraps with Postfix so clients that send to trapped addresses are prevented from sending me more spam?
sh-beta
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(Why) does FreeBSD 'net.inet.tcp.always_keepalive' violate RFC1122?

While working on a server application that runs on FreeBSD and uses TCP, I noticed that TCP keepalive probes get sent even though my application explicitly disables SO_KEEPALIVE on TCP sockets. According to RFC1122 Section 4.2.3.6 (TCP…
Ross Kilgariff
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Is MINFREE (percentage of disk space reserved for the root user) old hat?

On FreeBSD systems, and presumably a bunch of others, there is an amount of space reserved for root which is MINFREE% of the total capacity. With multi-terabyte filesystems, the default of 8% is a staggering amount of space. Volumes that large could…
Zimmy-DUB-Zongy-Zong-DUBBY
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Easy multi-level authentication for sudo

I have a FreeBSD server with password-based SSH enabled. I would like to enable sudo, but I do not want a potential attacker to be one password away from root access. My current solution is logging in as root using a public key (remote password…
Michael Ekstrand
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Conflicting information about the running kernel version in FreeBSD

I asked a related question about uname before and now want to ask from another angle, because the following simple yet obvious conflicting outputs may mean there is something many people did not think of (me included). I'm running FreeBSD 9 RELEASE;…
John
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Understanding PAM authentication procedure on FreeBSD with security/sssd

I'm trying to understand what's behaving errantly on my PAM configuration on FreeBSD 10.0 The machine is configured with two different authentication realms, one is the default Unix authentication and the other one is using the System Security…
Vinícius Ferrão
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Redis connection issue

We are currently experiencing a lot of Redis errors with the message Unable to connect: read error on connection, trying next server We run Redis on FreeBSD using PHP Redis and we have a hard time reproducing the error on Ubuntu so this might be a…
mre
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Serial Over LAN on FreeBSD with SuperMicro X9-SCM-F

How can I setup Serial-Over-Lan (SOL) on FreeBSD with a SuperMicro X9-SCM-F motherboard? There are a few resources out there but they contradict each other, are unclear, and don’t actually allow me to get SOL working past the boot loader.
Andrew Marshall
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How often should I defrag ZFS pools?

I ZFS scrub once a month which takes ~24 hours for the 72TB. For what I can find about how often I should scrub is: very busy pools, once per week not so busy pools, once per month or run a scrub, measure the time, and adjust accordingly. But what…
Sandra
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pf slows traffic extremely down

I am running a web and mail server on FreeBSD 9.1. The system is installed on a KVM vServer. Everything works fine - until I enable pf(4). My weblog becomes unconscionably slow. So does all the other traffic, but this is not that annoying. So it…
Steffen
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FreeBSD Jail with Loopback IP, IPFW, and natd - Outbound connections fail from jail

I've got a FreeBSD 9.0 server. It has several jails, but they all have this same issue. They can not initiate connections to the outside world. They communicate with each other and the host fine. relevant rc.conf settings: firewall_enable="YES" …
Chris S
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FreeBSD IP aliases in different subnets and default outgoing IP address

I have a FreeBSD VPS that until recently had assigned 3 public ip addresses in a /29 subnet. When making outgoing connections, the IP address used was always the non aliased one ".20", however now I have added another block of 3 ip addresses in a…
Tamas
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How to start netcat in listening mode from another host?

I have a script where I would like to start nc in listening mode on 10.10.10.11, but I would like to do it from 10.10.10.10, where I have this script ssh -n 10.10.10.11 nc -l 8023 | mbuffer -s 128k -m 1G | zfs receive $zfsPath zfs send $newestSnap |…
Sandra
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Freebsd Secondary Group not allowing folder deletion

TLDR: I have a user that is a member to a group as a secondary group. This user can delete files with 664 perms as a secondary user, but not directories with perms of 775. Details: I have a user. Lets call him ftpuser. I use him to upload and…
Jarrod Juleff
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