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Old

SELinux and sshd

Posted 01-02-2012 at 04:55 PM by sag47
Updated 08-05-2012 at 12:58 AM by sag47

So I've started using the new Fedora 16 on my main media server (previously F14) and decided to try something new this time. I've always set SELinux to permissive which is a bad idea normally for anything public (which this server isn't but I still want it). Anyway I believe I was testing something before I left for the holidays and ran
Code:
setenforce 0
which disables SELinux. I guess at some point it turned back on somehow and I was locked out of ssh. I dug through my logs (/var/log/messages,...
Senior Member
Views 6539 Comments 1 sag47 is offline
Old

SELinux and Apache ProxyPass

Posted 12-07-2011 at 12:39 PM by sag47
Updated 08-05-2012 at 12:58 AM by sag47

Today I was having trouble getting a httpd ProxyPass and ProxyPassReverse to work. As a background I'm working in RedHat Enterprise Linux 6.1. It took me a while to figure out what was wrong (longer than it should have) and as it turns out it worked after I disabled SELinux. So my configs were correct in /etc/httpd/conf.d/* and it passed all config tests. I'm sure you don't want to read a whole post of talking so I'll just get right into the grit of the commands. For the rest of the explanation...
Senior Member
Views 3153 Comments 0 sag47 is offline
Old

Stress testing a new hard drive...

Posted 11-20-2011 at 10:38 PM by sag47
Updated 11-20-2011 at 10:40 PM by sag47
Tags hardware

You should always stress test a new harddrive when you buy it.

Some people say, "Just hook it up for a few months and keep unimportant data on it. If it breaks in that 1-3 month time then it will be good for 3 or 4 years."

While that metric is okay at best I prefer to take a more systematic approach to it. I want to fill the whole hard drive with random 1 and 0 over a constant and long period of time. I do that because you are stressing the hard drive out...
Senior Member
Posted in Uncategorized
Views 7931 Comments 0 sag47 is offline
Old

Limiting and blocking connections dynamically.

Posted 10-31-2011 at 03:46 PM by sag47
Updated 01-29-2014 at 11:14 AM by sag47

Today I feel like talking about limiting connections which get made to a server. There are a few ways to do it; some cooler than others. I'd like to feature some open source software while I'm at it.

Today I happened upon this thread which hilariously got closed for good reason. Once you wade through all the crap you'll see some pretty cool posts which explain how to limit incoming connections within a certain time period and other suggestions. I'll point out the most useful related...
Senior Member
Posted in Uncategorized
Views 900 Comments 0 sag47 is offline
Old

Server latency

Posted 10-27-2011 at 08:26 AM by sag47

I wanted a quick and dirty way to determine server latency on my Kubuntu machine. This just parses simple output from ping and provides only the time values.

Code:
for x in drexel.edu google.com;do echo -n "[$x]: "; ping -c 1 $x | head -n 2 | tail -n 1 | awk '{split($8,arr,"=")} END{print arr[2],$9}';done
Output
Code:
[drexel.edu]: 0.576 ms
[google.com]: 6.23 ms
You can put as many servers or IPs as you want in the for loop to get a comparison....
Senior Member
Posted in Uncategorized
Views 547 Comments 0 sag47 is offline

  



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