I have the above box and there's some guy (a colleague of mine knows him) that offers paid IPTV services.

He told me that he sells Mag equipment with preinstalled encryption software (installed by him). I told him that I already have a Mag254 so in order to avoid the initial cost I asked him if I could send him my Mag so he can set it up and send it back to me.

I was a little worried though, because this Mag will be connected to my home network. Couldn't he (if he wanted) install malicious software to gain access to my network (pc, laptop etc.)?

Is something like that easy to do? Do you think it's risky sending my equipment to a stranger and then connecting it to my network? Is there some kind of check I could do after I get it back to make sure nothing malicious is installed?

Thanks in advance and sorry if I come off as a total noob regarding hacking. It's because I am. :)