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Can ISP block WIFI router from setting up PPPOE connection?

My ISP filtered clients by MAC. I cloned my MAC to WIFI router and everything was fine. Today my ISP started to block all WIFI routers. My Dlink DIR-300 with DD-WRT can not establish PPPOE connection anymore. PPPOE works fine on all PCs I tried. It seems there is no MAC filtering anymore and ISP uses another method to find WIFI routers.

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1 Answer 1

Change TTL in Windows OS.

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Tcpip\Parameters
DefaultTTL DWORD dectimal 129 or Hex 81

Restart OS.

TTL129.reg:

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Tcpip\Parameters]
"DefaultTTL"=dword:00000081

Restart OS.

TTL-Restore.reg:

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Tcpip\Parameters]
"DefaultTTL"=-

Restart OS.

Restore default delete DefaultTTL.

Set TTL 128 in Dlink DIR-300 if possible.

iptables -t mangle -I POSTROUTING -o `get_wanface` -j TTL --ttl-set 128
iptables -t mangle -I PREROUTING -i vlan1 -j TTL --ttl-set 129

DD-WRT wiki Iptables command

Change ISP ...

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