BSNL FTTH Bharat Fiber Broadband has problems after connecting to VPN

  • Thread starter Thread starter sibidas
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sibidas

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Location
Kerala
ISP
BSNL FTTH
Hi,

I am facing an issue with my BSNL fiber connection. After connecting to my office VPN, I am not able to access internal or external sites. I am able to ping though. I have also raised concern with BSNL team. my office IT team is telling it is a problem with the router that is shipped with BSNL connection. But I have not gotten any confirmation from bsnl team. They asked for traceroute details, which I provided. Anybody else facing similar issues using vpn through BSNL?
 
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@hemant , When i use the UTStarCom ONT modem provided by BSNL as rented, i have no issue to on it. But when i moved to start using the Genexis Earth 4222 ONT router, VPN issues started appearing. MTU size is 1432. This configuration changes is not needed when i use the UTStarCom Modem. Why is that?

I use the F5 BIG IP Edge Client VPN.
 
Upvote 0
Guys whoever is facing bsnl ftth problem with VPN specially global protect .. its a issue with ont/router .. please update your ont/router firmware and if already latest firmware is installed then also reinstall it ..( if you have sharp A321W ont/router then u have to change your ont/router too i don't know why this model has this problem). Otherwise with Syrotech router it is working fine after update ..

I have tried every possible way to fix this issue but this is the only one which can surely solve your problem..
 
Upvote 3
Guys whoever is facing bsnl ftth problem with VPN specially global protect .. its a issue with ont/router .. please update your ont/router firmware and if already latest firmware is installed then also reinstall it ..( if you have sharp A321W ont/router then u have to change your ont/router too i don't know why this model has this problem). Otherwise with Syrotech router it is working fine after update ..

I have tried every possible way to fix this issue but this is the only one which can surely solve your problem..
 
Upvote 1
gauravkaphalia said:
Guys whoever is facing bsnl ftth problem with VPN specially global protect .. its a issue with ont/router .. please update your ont/router firmware and if already latest firmware is installed then also reinstall it ..( if you have sharp A321W ont/router then u have to change your ont/router too i don't know why this model has this problem). Otherwise with Syrotech router it is working fine after update ..

I have tried every possible way to fix this issue but this is the only one which can surely solve your problem..
Click to expand...
This is true,

To add on these are the steps i did to correct my issue with Global VPN & BSNL FTTH issues.

Modem: optilink op-xont 71110n

1. Firmware update to modem: This doesn't make sense much, Especially when the same modem was working for a different ISP but was only having with BSNL FTTH. I still don't know how but updating firmware is definitely the first step to do.

2. MTU Setting: There are 2 sections to this
a. MTU Setting in Modem:
For me my setting has been 1492. I tried playing around with the modem and i did not see any difference if i kept it 1300 or 1430 or 1492. The VPN still used to have issues whatever the MTU setting i was keeping in the modem.
When i tried researching about this, I was able to understand that higher the MTU means higher the speed, So i have it at 1492 now.

b. MTU Setting in system:
This was the game changer for me, After firmware update VPN connectivity was there but was spotty meaning it used to get disconnected almost 30 - 40 mins especially when I was loading something heavy from VPN. That is when i found out that there is a MTU setting for the network in our system. So setting the MTU setting for the VPN will help.

For windows 10 machines this is what I did, Run the below command after opening cmd prompt as administrator

netsh interface ipv4 show subinterface

This will list out the different adapter settings and the MTU size for the same.
My MTU settings where all set to 1500, and MTU setting for VPN was set to 1400. I set the VPN to 1300 using the below command

netsh interface ipv4 set subinterface "Ethernet 3" mtu=1300 store=persistent

Voila! Suffered different problems for almost 2 months, Hope this helps to any new BSNL FTTH & VPN users. If this fixes the issue for you please respond to the thread with steps you followed for any other person.
 
Last edited:
Upvote 1
Surajullas said:
This is true,

To add on these are the steps i did to correct my issue with Global VPN & BSNL FTTH issues.

Modem: optilink op-xont 71110n

1. Firmware update to modem: This doesn't make sense much, Especially when the same modem was working for a different ISP but was only having with BSNL FTTH. I still don't know how but updating firmware is definitely the first step to do.

2. MTU Setting: There are 2 sections to this
a. MTU Setting in Modem:
For me my setting has been 1492. I tried playing around with the modem and i did not see any difference if i kept it 1300 or 1430 or 1492. The VPN still used to have issues whatever the MTU setting i was keeping in the modem.
When i tried researching about this, I was able to understand that higher the MTU means higher the speed, So i have it at 1492 now.

b. MTU Setting in system:
This was the game changer for me, After firmware update VPN connectivity was there but was spotty meaning it used to get disconnected almost 30 - 40 mins especially when I was loading something heavy from VPN. That is when i found out that there is a MTU setting for the network in our system. So setting the MTU setting for the VPN will help.

For windows 10 machines this is what I did, Run the below command after opening cmd prompt as administrator

netsh interface ipv4 show subinterface

This will list out the different adapter settings and the MTU size for the same.
My MTU settings where all set to 1500, and MTU setting for VPN was set to 1400. I set the VPN to 1300 using the below command

netsh interface ipv4 set subinterface "Ethernet 3" mtu=1300 store=persistent

Voila! Suffered different problems for almost 2 months, Hope this helps to any new BSNL FTTH & VPN users. If this fixes the issue for you please respond to the thread with steps you followed for any other person.
Click to expand...
Moved to Genexsis 4222 with dual band. Followed same procedure and working as expected.

Optlink wifi for some reason started getting cut every 15-20 mins.
 
Upvote 0
Same issue is with me as well ..My BSNL wifi connection is behaving same with my office VPN and im not interested in doing any troubleshotting at my end becuase the same laptop with VPN is works fine with JIOFI modem ,BSNL only has some issues at their end but ignoring to check at their end and simply saying that wifi is working fine on mobile hence no issues with their end :) :) :) ..my laptop with office VPN never had an such issues with any other providers which I used to connect with in past few years .BSNL only giving this issue.
 
Upvote 0
I am also seeing another issue, might be related. Torrent sites are now often showing SSL handshake error from cloudfare. Although when a VPN is used error goes away.
 
Upvote 1
ilaiyaraja R said:
Same issue is with me as well ..My BSNL wifi connection is behaving same with my office VPN and im not interested in doing any troubleshotting at my end becuase the same laptop with VPN is works fine with JIOFI modem ,BSNL only has some issues at their end but ignoring to check at their end and simply saying that wifi is working fine on mobile hence no issues with their end :) :) :) ..my laptop with office VPN never had an such issues with any other providers which I used to connect with in past few years .BSNL only giving this issue.
Click to expand...
even jio fiber has this problem. lower mtu can be set in windows wifi settings
 
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