Is my server rejecting traffic? How can I tell?
I have a vps with godaddy running centos 5 w/plesk 9.5, and I might be loosing traffic.
I have been working with a guy that does email blasts, and he has a server that the links in his emails go to which redirects to my site. When his server does the redirect it logs the email address, the IP, and the url.
His did a drop of 6k emails the the other day and hist server logged over 600 clicks. My analytics picked up around 70 from the blast. So i installed tuned apache and mysql for more connections and memory. Then I installed apachetop to monitor the next plast. Last night we did the blast and I received around 2 clicks by the time he had logged 78 clicks.
When we click the link in his email it works, apachetop shows the request, my analytic s show the visit, and there is no apparent issues.
How could this be? Is it possible that my server is not accepting the http requests at all, bouncing them before they make it to apache to proccess? If so, where might I go about in view this and how might I fix it.
What else could it be? I thought maybe DNS, but every nslookup tool i tried on the web resolved correctly.