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I have a strange issue at my place. I am experiencing very slow internet speed recently and same time I could see that all blocked contents from my ISP is unblocked from me.
I first thought it's a problem with ISP end but they said that they don't have any issue at their end and when I connect my laptop directly via cable to their Tilgin Ethernet gateway I don't have any issues. Then I restarted my wireless router (Belkin Play), everything was fine for about 15 minutes – no more slow internet and I couldn't access blocked sites.
15 minutes later same story again – slow internet and no blocked contents. I reset my router, installed firmware back but every time when router restarts for 15–20 minutes everything is fine but after that, same issue.
Therefore I thought my wireless router is the culprit and bought a brand new DLINK 826L router. After installing, for 30 minutes everything was fine but then same issue with this router too. I have installed it at my friends place to see if router is having any issue and it's perfectly fine.
Tried reaching ISP to check if they can see error in their Ethernet gateway but they are saying if connection if fine when connected directly to their gateway they cannot help me.
It sounds like someone has configured your router to use a VPN for Internet traffic. – David Schwartz – 2013-09-07T06:39:47.203
Hi David, If someone else have connected won't I see him in my wlan client list. Also when I have installed the new router my password and ssid also got changed – user252117 – 2013-09-07T07:37:13.990
I don't think they're connected to your router now. I think they configured it at some point in the past. – David Schwartz – 2013-09-07T08:01:04.463
IF that is the case is there anything that I can do. I have rest my wireless router and also reinstalled the firmware – user252117 – 2013-09-07T08:05:14.777
See if your default gateway changes. Maybe there's another machine on your network that's running a DHCP server. – David Schwartz – 2013-09-07T08:45:39.493