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Forum Discussion
Security Alert
My Netgear ReadyNAS NV+ has just posted me an email alert which looks ominous but which I don't understand. The unit has been working perfectly and nothing has happened to suggest problems. Is this ...
Hi Ron
If the NAS has a public IP address of 83.217.167.173, then I agree with kossboss.
If the NAS is behind a NAT router (the usual case), then destination ports 58121 and 5071 are being forwarded by your router to the NAS:
(a) perhaps you have set up rules to forward them. In this case, if the service you are using doesn't need UDP, you can change the router rules to forward TCP only.
If it does need UDP, then there isn't much you can do.
(b) perhaps the router is doing this automatically. If this is happening, then either you have an application on the NAS that is opening these ports - either through a service called UPNP, or by simply creating an outbound connection using that port. What add-ons do you have installed?
In case (b) - be advised that there is a massive security issue with upnp that was uncovered a couple weeks ago. Details are here: https://community.rapid7.com/community/ ... -dont-play Several people (including rapid7) are saying that you should turn off upnp services for now, and explicitly forward ports instead. The link includes a tool which will tell you if you have the vulnerability or not.
If the NAS has a public IP address of 83.217.167.173, then I agree with kossboss.
If the NAS is behind a NAT router (the usual case), then destination ports 58121 and 5071 are being forwarded by your router to the NAS:
(a) perhaps you have set up rules to forward them. In this case, if the service you are using doesn't need UDP, you can change the router rules to forward TCP only.
If it does need UDP, then there isn't much you can do.
(b) perhaps the router is doing this automatically. If this is happening, then either you have an application on the NAS that is opening these ports - either through a service called UPNP, or by simply creating an outbound connection using that port. What add-ons do you have installed?
In case (b) - be advised that there is a massive security issue with upnp that was uncovered a couple weeks ago. Details are here: https://community.rapid7.com/community/ ... -dont-play Several people (including rapid7) are saying that you should turn off upnp services for now, and explicitly forward ports instead. The link includes a tool which will tell you if you have the vulnerability or not.
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