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August 5, 2015

Make apt-get use IPv4 instead of IPv6

Filed under: Linux — Tags: , , , — admin @ 2:15 pm

I have try today to run some apt-get update and it take some time to figure the ipv6 ip . So I wanted to not use ipv6.
The fix is to un comment the line 54 from this file
precedence ::ffff:0:0/96 100

after this all run smooth.

December 16, 2014

Setting up HAProxy with SSL

Filed under: Linux — Tags: , , , , — admin @ 2:02 pm

Well today I was set up a haproxy to use ssl, and did’t figure out from first time how to get only one file for the pem.
In haproxy you have only one file with all certificates.

So the order is this:
cat >>
cat >>
cat intermediate.bundle >>

After this just add the
bind *:443 ssl crt /etc/ssl/
And you will have the right one.

January 29, 2014

How to display HTTP Headers with tcpdump

Filed under: Linux — Tags: , , , , — admin @ 9:19 pm

Well today I was needing to see some packages that arrived on apache. In order to see I have to use tcpdump, but you will only some short information if you are using basic.
In order to see HTTP header you have to use something like this:
tcpdump -n -vvvs 1024 -l -A host

If you want to see more information you have to increase the size, something like this
tcpdump -n -vvvs 1500-l -A host

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