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Alice
Joined: 10 Aug 2011
Posts: 13
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| Posted: Tue Nov 15, 2011 5:53 pm Post subject: 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! |
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Guspaz
Joined: 26 May 2009
Posts: 1150
Location: Montreal, QC
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| Posted: Wed Nov 16, 2011 12:06 pm Post subject: |
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| 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. |
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kevmille
Joined: 18 Nov 2011
Posts: 9
Location: HCMC, Vietnam
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| Posted: Fri Nov 18, 2011 12:41 pm Post subject: Re: Got an outbound traffic alert. What to do? Newb. |
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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/
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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