Weird DPI (Deep packet inspection) related problem

[partymonger]

Perhaps the OLT rebooted and it tried to re-provision all connected ONTs? If you are using a supported ONT, the OLT could remotely reconfigure or provision it, I suppose.

Yeah thats what im thinking. The bugger hides info all the time so I cant really trust his word. But then i was already on upgraded firmware and it didnt change the firsmware.

 

[eriek_halenx]

DPI is used for traffic shaping and site blocking by most isps.
This is usually the error message you get if your site is blocked by dpi.
View attachment 1184

@vignesh_venkatesan , i get the same error on its sister / mirror website (.to). But, the same site opens after clicking the reload page about 5-6 times in quick succession. Not sure what to make out of it. I initially thought they were mirror issues... which arent surprising for torrent sites.

 

[abbyck]

@eriek_halenx I think that's due to receiving packets from the site before the reset packet from isp

 

[eriek_halenx]

@abbyck , Could you explain in more detail? I'm not well versed in how it works. But would like to know.

 

[abbyck]

I don't know much @eriek_halenx . That was my assumption while refreshing continues to get blocked sites connected. I might be wrong

 

[partymonger]

Ok the problem was in the hosts file. A local dev app I tried for 1 min had changed the hosts file entry for the website.

However, BSNL continues to use DPI and it will be a problem that compounds every problem that you have to troubleshoot

 

[varkey]

I don't think its DPI, just blocking based on IP address perhaps.

 

[partymonger]

@varkey - BSNL has DPI. There is no doubt over it. It happens only on websites that are banned. Works with anti-dpi measures. If you have some test, I can do it to confirm.

 

[varkey]

Could you pls share why you think it's DPI? Pls post examples of sites blocked and what happens exactly when you try to open a blocked site.

 

[partymonger]

@varkey - Sure mate, here are the screen shots. Let me know what you think.