Server Fault Weekly Newsletter
Server Fault Weekly Newsletter

Top new questions this week:

Is it possible to reboot a Linux OS without rebooting the hardware?

Is there a way to reboot a Linux system (Debian in particular) without rebooting the hardware? I have a RAID controller that takes a bit to get itself running before the OS starts up, and I would ...

linux debian raid  
asked by lacrosse1991 54 votes
answered by ewwhite 65 votes

20Mbps WAN limited to 10Mbps over IPSec Tunnel

We recently upgraded a remote site from a 10/10Mbps fibre to a 20/20Mbps fibre link (it is fibre to the basement, then VDSL from the basement to the office, roughly 30 meters). There are regular large ...

windows ipsec wide-area-network  
asked by Mark Henderson 9 votes
answered by Mark Henderson 2 votes

SSH: Safe for client to host private RSA key?

Is it safe to generate a public/private key pair on the server, add the public key to the authorized_keys list, and then copy the private key to each client, as described here ...

ssh ssh-keys  
asked by user345807 8 votes
answered by Michael Hampton 16 votes

Linux device-mapper maps LVM PV nested inside LV when taking snapshot

Which is really messing with my plan to back up this machine... I have a server which is a KVM hypervisor to several virtual machines. One of these is running Docker. It has its Docker volumes on ...

linux lvm device-mapper  
asked by Michael Hampton 7 votes
answered by Michael Hampton 5 votes

Does "~all" in the middle of an SPF record signal the end of the record when it is parsed?

Our company's SPF record format is as follows: "v=spf1 ~all a mx ip4:X.X.0.0/23 ?all" So we have an "~all" in the middle of our SPF record. On the ...

domain-name-system email spam google-apps spf  
asked by whelanska 5 votes
answered by Michael Hampton 5 votes

Why do files end up being filled entirely with null bytes after replication using DFSR?

We're using Microsoft's Distributed File System for replication. In our scenario we have a single writer that creates/overwrites/deletes files and several distributed readers. The writer is running ...

windows-server-2008-r2 windows-server-2003-r2 dfs-r  
asked by ckerth 4 votes

Is it necessary to purchase an OID for ADCS?

I am interested in utilizing ADCS to generate trusted certificates for internal web applications. However, from my readings it appears that I need to purchase an OID, which looks pretty expensive. Is ...

tls windows certificate-authority  
asked by appsecguy 4 votes
answered by Bruno Rohée 2 votes

Greatest hits from previous weeks:

How can I find out if a port is opened or not?

I have installed Apache server on my Windows 7 computer. I was able to display the default index.php by typing http://localhost/ in the address line of my browser. However, I am still unable to see ...

windows-7 web-server firewall port  
asked by Roman 15 votes
answered by Urda 11 votes

In Nginx, how can I rewrite all http requests to https while maintaining sub-domain?

I want to rewrite all http requests on my web server to be https requests, I started with the following: server { listen 80; location / { rewrite ^(.*)$1 ...

nginx redirect https  
asked by MikeN 207 votes
answered by Saif Bechan 265 votes

Can you answer these?

What is the APPCMD.EXE syntax to remove all IP Address and Domain Restrictions from a website?

I have the syntax to add the initial Restricted IPs. I just need syntax to remove all IPs for automation purposes. C:\Windows\System32\inetsrv\appcmd.exe set config "ParentSite" ...

asked by Matt Whittingham 1 vote

Benchmarking for DISK I/O Writes Per Second - ElasticSearch and MySQL

During working on our project we needed to decide should we use "ElasticSearch" or "MySQL" to record the audit/trail logs of the system. Searching speed is not an issue here, we needed to see the disk ...

mysql performance-monitoring io elastic-search  
asked by Arfeen 2 votes

Configure Centos7 Apache 2.4 php-fpm to run as user

I would like to configure a Centos 7 Apache 2.4 Linode to use php-fpm to execute php as the file owner. The docs for earlier Centos6 / Apache2.2 don't work and the configurations I have seen for ...

configuration php-fpm apache-2.4 centos7  
asked by user3794294 1 vote
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