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Internet too slow after connecting to vpn

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Last Modified: 2020-10-11
Hi guys, I got a adsl connection in a remote site. Getting speed around 15download 10 upload mbps
Got vpn configured in windows server 2012(l2tp)
Once I connect to vpn from my laptop which runs windows 10, it’s getting connected- but internet speed drops to less than 1mbps download and upload.  
There is no issues from remote site or remote computer. Because I tested with phone hotspot from different laptop and it’s same issue Happening, the speed drops so bad.

I connect vpn from a windows computer by creating vpn network adapter using wan ip and l2tp protocol

So could you guys help me in finding whAts wrong on server side ? Or any other idea
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Edmond HawilaChief Operating Officer
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Author

Commented:
Hi,
I just connect to vpn to access few network drives which are attached in my laptop, which are from server.
So I connect vpn, so my laptop thinks I am in same lan as server and my mapdrive work.

So I when I am connected to vpn, I need use my mapdrive and internet from my local computer. Apart from these two I don't use any other resource/I don't use rdp to connect anywhere else
JohnBusiness Consultant (Owner)
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Commented:
You said you get essentially the same speed up as down without VPN.

Normally upload speed is much less. Your VPN performance reflects this.

Try split tunnel and then use Internet outside your VPN

You might consider trying MTU at 1492 or a bit less on the router settings. Default 1500 is usually fine

Author

Commented:
Hi Edmond
- I tried un tick - use default gateway at remote network.
- actually the Internet was back to normal speed after un ticking, but my network  drives not working. I want the network drives to be connected as that's the main point why I connect vpn.
- if I tick it back, network drives works but the internet is too slow
JohnBusiness Consultant (Owner)
Most Valuable Expert 2012
Expert of the Year 2018

Commented:
VPN is slow for network drives and you need to be patient. Do not use Internet at the Remote End. You need the internal gateway for your server connection.

Author

Commented:
Hi John,
I don't have a remote end. I don't use rdp to connect to terminal server or anything

I just got my laptop where network drives mapped. To use those network drives I just connect to VPN.

So are you saying it is normal ? When I connect to VPN the local internet in my laptop becomes slow, is it normal ?
JohnBusiness Consultant (Owner)
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Expert of the Year 2018

Commented:
What are you using VPN for?   If you do not connect to your business by VPN, then what is it for?

Author

Commented:
I got network drives in my laptop. The network drives are in business server.
So if I don't use VPN. I can't access those network drives.
Network drives becomes accessible only if I connect to VPN
JohnBusiness Consultant (Owner)
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Expert of the Year 2018

Commented:
What do you connect to with VPN?

Author

Commented:
Sorry I could not get your question.

I don't connect to anything. I just use network drives which are mapped in my laptop.which is originally in server
JohnBusiness Consultant (Owner)
Most Valuable Expert 2012
Expert of the Year 2018

Commented:
Then remove any VPN profiles. If you are using PPtP VPN it will get in the way of Internet and network. If you are not connecting, remove any and all VPN profiles so it does not connect or get in the way. It is not needed for a local connection from your LAN to the server.

Author

Commented:
My laptop is not in the local site.
Am in a remote site. And I connect to VPN to use network drives which are in my laptop- which are originally in server which is in main office.
Hope you understood my question now
JohnBusiness Consultant (Owner)
Most Valuable Expert 2012
Expert of the Year 2018

Commented:
So you ARE connecting to a remote location.   So then that is normal for VPN.  

For this, please use IPsec VPN and NOT PPtP VPN.  That will permit split tunnel VPN.

Author

Commented:
Hi ,
I checked security tab in vpn network adapter setting - the type of VPN am using is layer2 tunnelling protocol with IPSec
JohnBusiness Consultant (Owner)
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Commented:
Then you should be able to set it to split Tunneling and use Internet outside of the VPN  (that is, not force Internet through slow VPN)

Author

Commented:
How do I set split tunneling ? Is it soemthing. Needs to be done on server side or in my laptop ?
JohnBusiness Consultant (Owner)
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Author

Commented:
I use-
In network and sharing centre, setup new connection, connect to work place - create new connection- user internet connection(vpn) . This is how my vpn configured.
I don't use any other vpn client software.

And in my current setup, I checked all tabs, I could not find an option as split tunnel
JohnBusiness Consultant (Owner)
Most Valuable Expert 2012
Expert of the Year 2018

Commented:
That is built in VPN and does not have that option (to the best of my knowledge).

If you need to live out of the branch office, get better VPN (hardware VPN).

If this is one time, put up with the slowness.

Author

Commented:
Ok. Is there anything I can change at server side VPN settings  to make it work better ?
JohnBusiness Consultant (Owner)
Most Valuable Expert 2012
Expert of the Year 2018

Commented:
Not really. Microsoft VPN is slow and I don't know many (if any) people who use it.

That is why I say, if this is a long term setup, get better VPN.
Edmond HawilaChief Operating Officer
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Commented:
Mr. X, when you un tick - use default gateway at remote network, your drives should still work!!

If they don;t it might be a case of DNS. Try mapping the drives with the IP instead of the name of the share and see if that works.

Let me know.
Raymond ZwartsNetwork Engineer

Commented:
Is the windows server that runs the VPN server on the same IP subnet as where the mapped drives are? And what IP do you get as a VPN client ?
If your mapped drives stop working as soon as you unthick the use remote gateway checkbox it sounds as if you have a routing issue.
Seth SimmonsLead Systems Administrator
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Commented:
No comment has been added to this question in more than 21 days, so it is now classified as abandoned.

I have recommended this question be closed as follows:

Split:
-- 'David Favor' (https:#a42743088)
-- 'Edmond Hawila' (https:#a42743096)
-- 'John' (https:#a42743572)


If you feel this question should be closed differently, post an objection and the moderators will review all objections and close it as they feel fit. If no one objects, this question will be closed automatically the way described above.

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