I have tried to use esniper in the past, but always had problems with CA Certificate errors. I tried the suggestion of downloading a new certifcate, or downgrading my version of curl/openssl but nothing worked.
I have now found a solution, as detailed here : http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=624005
Uninstalling libcurl4-cares-dev, libcurl3-cares, and then installing libcurl4-gnutls-dev and recompiling worked for me.
sudo apt-get remove libcurl4-cares-dev
sudo apt-get remove libcurl3-cares
( I also remove sudo libcurl4-openssl-dev, but I am not sure this is required)
sudo apt-get install libcurl4-gnutls-dev
and then in the untarred ensiper 2.27 folder
sudo make install
Thanks to the original posted in the Link.
A different curl/ssl related issue
Apparently there is some issue with openssl strict implementation of certificate standards, or something similar.
curl can be built with openssl or gnutls.
On my gentoo box I had to rebuild curl to use gnutls instead of openssl, and the intermittent problems went away.
More details here:
I had similar problems on ubuntu 12 after compling the source for the latest esniper from sourceforge. Thanks.
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