I use D6300. It does Port Re-direction and displays limited line stats through the GUI (Connection speed, Line attn., Noise margin, packet data etc.) You may be able to Telnet more data out of it but haven't succeeded at this yet. No MAC address controls that I can find.
It does sync at a slightly higher connection speed than any other router I've used though on my BT ADSL2+ line.
Only had it a couple of days so still working it out.
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