I don't know what does it mean. But since your internet is working OK, maybe it is not a big deal. If you do care, confirm with TP-LINK technician. http://www.tp-link.com/en/Support/contact/

maiki1223 wrote well i got a synology nas server, and i put it under DMZ but i cant logon it from my domain, because port 5000 is closed, and i tried it on a pc whit static ip. what do you mean whit...

If you reboot it, the log will be cleared. Any if you got the log, you may contact TP-LINK technician for some advice. Share it here pls. http://www.tp-link.com/en/Support/contact/

Red5goahead wrote I have a pc, the myskyHD and a smart TV under powerline, no one work fine during these period. The router ip is un-pingable. What's the matter with the static ip? Because you said...

No such a router and so many clients to test. As I know, the lease time indicates something, right? You may confirm with TP-LINK people directly... http://www.tp-link.com/en/Support/contact/

Same cable and same device when testing any other port? If so, take a photo as a proof and send it to TP-LINK to ask for replacement. http://www.tp-link.us/Support/contact/