Discussion on how to prevent, defend against black and Trojan Horse of VPS

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Do not know with VPS webmaster will have such experience, Baidu and Google just began to include the time, one day, in Google site when they found their website was hanging on the Trojan, flow with the line down, blood pressure straight up, busy for half a day, the results of the next days were hanging, psychological close to collapse , I don't know what to do.

The impact of the site was hanging horse I think we are very clear, search engine included, user experience, site data security, almost the lifeblood of the site will be hit. In fact, whether it's a standalone server, or VPS generally require their own server security, server relative system resources will be richer, install anti-virus software, firewalls and so on will be easier, and conditional can also add to the server hard defense, the way to prevent relatively more. And the VPS because the memory or CPU relatively small, if installed anti-virus software and firewalls and so on to prevent software will cause the system is very slow, security defense is more difficult.

But we can think of a different way of thinking, if you can not use the resources needed to carry out the prevention, how to save the way to do it? Let's analyze the following:

Antivirus software for the virus, AdSense most of the VPS is uploaded to download data, their own things with a virus is less likely, anti-virus software can choose not to install, because it is very much in the system resources.

Two. Firewall personal think is necessary, Baidu can find a lot of Trojans are through the port came in, this is a hacker attacks the computer an important channel, and the general firewall on the system resources occupy low.

Three. Operating system patches, if you are using Windows Server, patches are necessary to play, you can choose to open the system automatically updated or installed 360 security guards to update the security, the meaning of the Earth people know.

Four. Access to the Site directory, read and write access to the directory is a lot of webmaster easy to ignore a point, imagine you to the site to visit the user to open Write permission is a terrible thing.

Through the above analysis, if the new VPS for the said to carry out security precautions, I believe the chance of being hanged horse is much smaller. But if the horse has been hanged himself cleared away the webmaster also need to pay attention to the following points:

The whole station procedure check, because after the hacker hangs the horse, will upload some code file to hide, next convenient again comes.

Two. Check the file in the site update time, this can be seen which files have been modified, or changed permissions.

Three. Delete unnecessary code, file, specification directory structure, just imagine, you go to rubbish heap inside throw a rubbish is found difficulty.

Four. Try not to use 21 ports do ftp,3389 port to do remote landing.

Write here, I bought is 512 memory VPS, installed 360 security guards, firewall, Dedecms,discuz Forum, the system runs normally, access speed is not affected, provided to you for reference.

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