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Community ▶ Questions ▶ Got an outbound traffic alert. What to do? Newb.
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Got an outbound traffic alert. What to do? Newb.

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Hi all,

I'm running a handful of small wordpress sites on my Linode and today I got an alert to say

"Your linode has exceeded the notification threshold (5) for outbound traffic rate by averaging 7.95 Mb/s for the last 2 hours"

I'm assuming this is something I need to worry about?

My network graph shows an outbound spike up to 99.73 mb/sec for what looks like about 15 mins looking at the 24 h dashboard graph. It now appears back to normal.

What steps do I need to take?

I have Linode backups enabled.

Thanks!

2 Replies

Maybe check your web server logs to see if anything there used a lot of traffic? It's hard to diagnose that kind of thing when it's not actively happening.

Nginx and PHP with fastcgi has a security hole in them. Hackers can inject a code through your files, images, etc. Read up on the following to secure your site:

~~[https://nealpoole.com/blog/2011/04/setting-up-php-fastcgi-and-nginx-dont-trust-the-tutorials-check-your-configuration/" target="_blank">](https://nealpoole.com/blog/2011/04/sett … iguration/">https://nealpoole.com/blog/2011/04/setting-up-php-fastcgi-and-nginx-dont-trust-the-tutorials-check-your-configuration/](

~~[http://cnedelcu.blogspot.com/2010/05/nginx-php-via-fastcgi-important.html" target="_blank">](http://cnedelcu.blogspot.com/2010/05/ng … rtant.html">http://cnedelcu.blogspot.com/2010/05/nginx-php-via-fastcgi-important.html](

I was surprised that several of my WordPress sites were vulnerable.

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