Slow VPN

I used the following KBs to install and configure VPN on
Windows Server 2003 and XPs pro.

How To Install and Configure a Virtual Private Network
Server in Windows Server
2003http://support.microsoft.com/?id=323441

How to configure a connection to a virtual private
network (VPN) in Windows XP
http://support.microsoft.com/?id=314076

The data outbound is working fine and as expected, but
the inbound is very slow at 28kb/s, which is creating
kind of bottleneck in the connection adsl 512/128.

Any help please ?

Regards

One thought is to tweak the MTU for your DSL connection. You would have to
check the device docs for instructions. Make sure you document your current
setting and change the setting just a bit at a time. I think aroud 1450 may
be a good place to start. I don't use DSL anymore. --- Steve



"Smart" <(E-Mail Removed)> wrote in message
news:0c3e01c4a6ff$a52f2c60$(E-Mail Removed)...
>I used the following KBs to install and configure VPN on
> Windows Server 2003 and XPs pro.
>
> How To Install and Configure a Virtual Private Network
> Server in Windows Server
> 2003http://support.microsoft.com/?id=323441
>
> How to configure a connection to a virtual private
> network (VPN) in Windows XP
> http://support.microsoft.com/?id=314076
>
> The data outbound is working fine and as expected, but
> the inbound is very slow at 28kb/s, which is creating
> kind of bottleneck in the connection adsl 512/128.
>
> Any help please ?
>
> Regards
>

Hi Steve

With all due respect, I didn't understand a thing you've
said. "tweak the MTU" and "around 1450 may be a good
place to start". I can't understand. I am sorry, there
must be something more straightforward and better than
that... :-D

Regards

>-----Original Message-----
>One thought is to tweak the MTU for your DSL connection.
You would have to check the device docs for instructions.
Make sure you document your current setting and change
the setting just a bit at a time. I think aroud 1450 may
be a good place to start. I don't use DSL anymore. ---
Steve


>"Smart" <(E-Mail Removed)> wrote in message
>news:0c3e01c4a6ff$a52f2c60$(E-Mail Removed)...
>>I used the following KBs to install and configure VPN on
>> Windows Server 2003 and XPs pro.
>>
>> How To Install and Configure a Virtual Private Network
>> Server in Windows Server
>> 2003http://support.microsoft.com/?id=323441
>>
>> How to configure a connection to a virtual private
>> network (VPN) in Windows XP
>> http://support.microsoft.com/?id=314076
>>
>> The data outbound is working fine and as expected, but
>> the inbound is very slow at 28kb/s, which is creating
>> kind of bottleneck in the connection adsl 512/128.
>>
>> Any help please ?
>>
>> Regards.

TCP/IP and NBT Configuration Parameters for Windows 2000 or Windows NT
http://support.microsoft.com/default...;EN-US;q120642

TCP/IP and NBT Configuration Parameters for Windows XP
http://support.microsoft.com/default...b;EN-US;314053

--
Todd J Heron, MCSE
Windows 2003/2000/NT

"Smart" <(E-Mail Removed)> wrote in message
news:1bb801c4a729$aa6b4130$(E-Mail Removed)...
> Hi Steve
>
> With all due respect, I didn't understand a thing you've
> said. "tweak the MTU" and "around 1450 may be a good
> place to start". I can't understand. I am sorry, there
> must be something more straightforward and better than
> that... :-D
>
> Regards
>
> >-----Original Message-----
> >One thought is to tweak the MTU for your DSL connection.
> You would have to check the device docs for instructions.
> Make sure you document your current setting and change
> the setting just a bit at a time. I think aroud 1450 may
> be a good place to start. I don't use DSL anymore. ---
> Steve
>
>
> >"Smart" <(E-Mail Removed)> wrote in message
> >news:0c3e01c4a6ff$a52f2c60$(E-Mail Removed)...
> >>I used the following KBs to install and configure VPN on
> >> Windows Server 2003 and XPs pro.
> >>
> >> How To Install and Configure a Virtual Private Network
> >> Server in Windows Server
> >> 2003http://support.microsoft.com/?id=323441
> >>
> >> How to configure a connection to a virtual private
> >> network (VPN) in Windows XP
> >> http://support.microsoft.com/?id=314076
> >>
> >> The data outbound is working fine and as expected, but
> >> the inbound is very slow at 28kb/s, which is creating
> >> kind of bottleneck in the connection adsl 512/128.
> >>
> >> Any help please ?
> >>
> >> Regards.

What these 2 KBs got to do with my problem ?


>-----Original Message-----
>TCP/IP and NBT Configuration Parameters for Windows 2000
or Windows NT
>http://support.microsoft.com/default.aspx?scid=kb;EN-
US;q120642
>
>TCP/IP and NBT Configuration Parameters for Windows XP
>http://support.microsoft.com/default.aspx?scid=kb;EN-
US;314053
>
>--
>Todd J Heron, MCSE
>Windows 2003/2000/NT
>
>"Smart" <(E-Mail Removed)> wrote in message
>news:1bb801c4a729$aa6b4130$(E-Mail Removed)...
>> Hi Steve
>>
>> With all due respect, I didn't understand a thing
you've
>> said. "tweak the MTU" and "around 1450 may be a good
>> place to start". I can't understand. I am sorry,
there
>> must be something more straightforward and better than
>> that... :-D
>>
>> Regards
>>
>> >-----Original Message-----
>> >One thought is to tweak the MTU for your DSL
connection.
>> You would have to check the device docs for
instructions.
>> Make sure you document your current setting and change
>> the setting just a bit at a time. I think aroud 1450
may
>> be a good place to start. I don't use DSL anymore. ---

>> Steve
>>
>>
>> >"Smart" <(E-Mail Removed)> wrote in message
>> >news:0c3e01c4a6ff$a52f2c60$(E-Mail Removed)...
>> >>I used the following KBs to install and configure
VPN on
>> >> Windows Server 2003 and XPs pro.
>> >>
>> >> How To Install and Configure a Virtual Private
Network
>> >> Server in Windows Server
>> >> 2003http://support.microsoft.com/?id=323441
>> >>
>> >> How to configure a connection to a virtual private
>> >> network (VPN) in Windows XP
>> >> http://support.microsoft.com/?id=314076
>> >>
>> >> The data outbound is working fine and as expected,
but
>> >> the inbound is very slow at 28kb/s, which is
creating
>> >> kind of bottleneck in the connection adsl 512/128.
>> >>
>> >> Any help please ?
>> >>
>> >> Regards.
>
>
>.
>

OK. See the link below for more details. MTU stands for maximum
transmissiion unit and if it is too large you can end up with packet
fragmentation that will slow down data transmission. The pppoe connectoid or
the router device will have configuration settings to change the MTU size.
Check your docs for what you are using. It may also help to contact your ISP
if their support staff is on this planet. The manufactures of most routers
will have their full manual on their website or a FAQ that may be able to
help you out. --- Steve

http://www.allaboutjake.com/network/linksys/mtu.html

"Smart" <(E-Mail Removed)> wrote in message
news:1bb801c4a729$aa6b4130$(E-Mail Removed)...
> Hi Steve
>
> With all due respect, I didn't understand a thing you've
> said. "tweak the MTU" and "around 1450 may be a good
> place to start". I can't understand. I am sorry, there
> must be something more straightforward and better than
> that... :-D
>
> Regards
>
> >-----Original Message-----
> >One thought is to tweak the MTU for your DSL connection.
> You would have to check the device docs for instructions.
> Make sure you document your current setting and change
> the setting just a bit at a time. I think aroud 1450 may
> be a good place to start. I don't use DSL anymore. ---
> Steve
>
>
> >"Smart" <(E-Mail Removed)> wrote in message
> >news:0c3e01c4a6ff$a52f2c60$(E-Mail Removed)...
> >>I used the following KBs to install and configure VPN on
> >> Windows Server 2003 and XPs pro.
> >>
> >> How To Install and Configure a Virtual Private Network
> >> Server in Windows Server
> >> 2003http://support.microsoft.com/?id=323441
> >>
> >> How to configure a connection to a virtual private
> >> network (VPN) in Windows XP
> >> http://support.microsoft.com/?id=314076
> >>
> >> The data outbound is working fine and as expected, but
> >> the inbound is very slow at 28kb/s, which is creating
> >> kind of bottleneck in the connection adsl 512/128.
> >>
> >> Any help please ?
> >>
> >> Regards.

Thanks

I followed step-by-step KB 323441 and I contend that there is no reason why
it should not work 100%. There must be something else somewhere else I
should check or uncheck. With a network of 130 users, I am not quite keen
on suggestions which may affect in one way or another my environment. I
would very much appreciate a helpful suggestion or at least the reason why I
am experiencing this problem, and if I need to change anything in relation,
for example, to the hardware. Of course, I remain at your disposal for any
further information you may require.

Regards

"Steven L Umbach" <(E-Mail Removed)> wrote in message
news:%23rpZL$(E-Mail Removed)...
OK. See the link below for more details. MTU stands for maximum
transmissiion unit and if it is too large you can end up with packet
fragmentation that will slow down data transmission. The pppoe connectoid or
the router device will have configuration settings to change the MTU size.
Check your docs for what you are using. It may also help to contact your ISP
if their support staff is on this planet. The manufactures of most routers
will have their full manual on their website or a FAQ that may be able to
help you out. --- Steve

http://www.allaboutjake.com/network/linksys/mtu.html

"Smart" <(E-Mail Removed)> wrote in message
news:1bb801c4a729$aa6b4130$(E-Mail Removed)...
> Hi Steve
>
> With all due respect, I didn't understand a thing you've
> said. "tweak the MTU" and "around 1450 may be a good
> place to start". I can't understand. I am sorry, there
> must be something more straightforward and better than
> that... :-D
>
> Regards
>
> >-----Original Message-----
> >One thought is to tweak the MTU for your DSL connection.
> You would have to check the device docs for instructions.
> Make sure you document your current setting and change
> the setting just a bit at a time. I think aroud 1450 may
> be a good place to start. I don't use DSL anymore. ---
> Steve
>
>
> >"Smart" <(E-Mail Removed)> wrote in message
> >news:0c3e01c4a6ff$a52f2c60$(E-Mail Removed)...
> >>I used the following KBs to install and configure VPN on
> >> Windows Server 2003 and XPs pro.
> >>
> >> How To Install and Configure a Virtual Private Network
> >> Server in Windows Server
> >> 2003http://support.microsoft.com/?id=323441
> >>
> >> How to configure a connection to a virtual private
> >> network (VPN) in Windows XP
> >> http://support.microsoft.com/?id=314076
> >>
> >> The data outbound is working fine and as expected, but
> >> the inbound is very slow at 28kb/s, which is creating
> >> kind of bottleneck in the connection adsl 512/128.
> >>
> >> Any help please ?
> >>
> >> Regards.

Keep in mind that your uplink speed is one fourth of your download speed.
Add into that the overhead of VPN with encryption and resultant extra packet
size and it will seem slow. I had a that same uplink speed at my business
and it was painfully slow. Also the thought of MTU adjustment would be an
adjustment with your DSL router - not your actual VPN configuration with the
server. I use a Netgear NAT router/firewall and I can adjust the MTU on it
which will not in any way affect internal non WAN network performance. ---
Steve


"Smart" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> Thanks
>
> I followed step-by-step KB 323441 and I contend that there is no reason
> why
> it should not work 100%. There must be something else somewhere else I
> should check or uncheck. With a network of 130 users, I am not quite keen
> on suggestions which may affect in one way or another my environment. I
> would very much appreciate a helpful suggestion or at least the reason why
> I
> am experiencing this problem, and if I need to change anything in
> relation,
> for example, to the hardware. Of course, I remain at your disposal for
> any
> further information you may require.
>
> Regards
>
> "Steven L Umbach" <(E-Mail Removed)> wrote in message
> news:%23rpZL$(E-Mail Removed)...
> OK. See the link below for more details. MTU stands for maximum
> transmissiion unit and if it is too large you can end up with packet
> fragmentation that will slow down data transmission. The pppoe connectoid
> or
> the router device will have configuration settings to change the MTU size.
> Check your docs for what you are using. It may also help to contact your
> ISP
> if their support staff is on this planet. The manufactures of most routers
> will have their full manual on their website or a FAQ that may be able to
> help you out. --- Steve
>
> http://www.allaboutjake.com/network/linksys/mtu.html
>
> "Smart" <(E-Mail Removed)> wrote in message
> news:1bb801c4a729$aa6b4130$(E-Mail Removed)...
>> Hi Steve
>>
>> With all due respect, I didn't understand a thing you've
>> said. "tweak the MTU" and "around 1450 may be a good
>> place to start". I can't understand. I am sorry, there
>> must be something more straightforward and better than
>> that... :-D
>>
>> Regards
>>
>> >-----Original Message-----
>> >One thought is to tweak the MTU for your DSL connection.
>> You would have to check the device docs for instructions.
>> Make sure you document your current setting and change
>> the setting just a bit at a time. I think aroud 1450 may
>> be a good place to start. I don't use DSL anymore. ---
>> Steve
>>
>>
>> >"Smart" <(E-Mail Removed)> wrote in message
>> >news:0c3e01c4a6ff$a52f2c60$(E-Mail Removed)...
>> >>I used the following KBs to install and configure VPN on
>> >> Windows Server 2003 and XPs pro.
>> >>
>> >> How To Install and Configure a Virtual Private Network
>> >> Server in Windows Server
>> >> 2003http://support.microsoft.com/?id=323441
>> >>
>> >> How to configure a connection to a virtual private
>> >> network (VPN) in Windows XP
>> >> http://support.microsoft.com/?id=314076
>> >>
>> >> The data outbound is working fine and as expected, but
>> >> the inbound is very slow at 28kb/s, which is creating
>> >> kind of bottleneck in the connection adsl 512/128.
>> >>
>> >> Any help please ?
>> >>
>> >> Regards.
>
>
>

It is worth noting that inbound traffic (ie inbound to the VPN server)
will depend on the rate that the client can send. If the client has a slow
uplink, that controls the throughput.

"Steven L Umbach" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> Keep in mind that your uplink speed is one fourth of your download speed.
> Add into that the overhead of VPN with encryption and resultant extra
> packet size and it will seem slow. I had a that same uplink speed at my
> business and it was painfully slow. Also the thought of MTU adjustment
> would be an adjustment with your DSL router - not your actual VPN
> configuration with the server. I use a Netgear NAT router/firewall and I
> can adjust the MTU on it which will not in any way affect internal non WAN
> network performance. --- Steve
>
>
> "Smart" <(E-Mail Removed)> wrote in message
> news:(E-Mail Removed)...
>> Thanks
>>
>> I followed step-by-step KB 323441 and I contend that there is no reason
>> why
>> it should not work 100%. There must be something else somewhere else I
>> should check or uncheck. With a network of 130 users, I am not quite
>> keen
>> on suggestions which may affect in one way or another my environment. I
>> would very much appreciate a helpful suggestion or at least the reason
>> why I
>> am experiencing this problem, and if I need to change anything in
>> relation,
>> for example, to the hardware. Of course, I remain at your disposal for
>> any
>> further information you may require.
>>
>> Regards
>>
>> "Steven L Umbach" <(E-Mail Removed)> wrote in message
>> news:%23rpZL$(E-Mail Removed)...
>> OK. See the link below for more details. MTU stands for maximum
>> transmissiion unit and if it is too large you can end up with packet
>> fragmentation that will slow down data transmission. The pppoe connectoid
>> or
>> the router device will have configuration settings to change the MTU
>> size.
>> Check your docs for what you are using. It may also help to contact your
>> ISP
>> if their support staff is on this planet. The manufactures of most
>> routers
>> will have their full manual on their website or a FAQ that may be able to
>> help you out. --- Steve
>>
>> http://www.allaboutjake.com/network/linksys/mtu.html
>>
>> "Smart" <(E-Mail Removed)> wrote in message
>> news:1bb801c4a729$aa6b4130$(E-Mail Removed)...
>>> Hi Steve
>>>
>>> With all due respect, I didn't understand a thing you've
>>> said. "tweak the MTU" and "around 1450 may be a good
>>> place to start". I can't understand. I am sorry, there
>>> must be something more straightforward and better than
>>> that... :-D
>>>
>>> Regards
>>>
>>> >-----Original Message-----
>>> >One thought is to tweak the MTU for your DSL connection.
>>> You would have to check the device docs for instructions.
>>> Make sure you document your current setting and change
>>> the setting just a bit at a time. I think aroud 1450 may
>>> be a good place to start. I don't use DSL anymore. ---
>>> Steve
>>>
>>>
>>> >"Smart" <(E-Mail Removed)> wrote in message
>>> >news:0c3e01c4a6ff$a52f2c60$(E-Mail Removed)...
>>> >>I used the following KBs to install and configure VPN on
>>> >> Windows Server 2003 and XPs pro.
>>> >>
>>> >> How To Install and Configure a Virtual Private Network
>>> >> Server in Windows Server
>>> >> 2003http://support.microsoft.com/?id=323441
>>> >>
>>> >> How to configure a connection to a virtual private
>>> >> network (VPN) in Windows XP
>>> >> http://support.microsoft.com/?id=314076
>>> >>
>>> >> The data outbound is working fine and as expected, but
>>> >> the inbound is very slow at 28kb/s, which is creating
>>> >> kind of bottleneck in the connection adsl 512/128.
>>> >>
>>> >> Any help please ?
>>> >>
>>> >> Regards.
>>
>>
>>
>
>

I guess you said it better than me Bill. I had a VPN between work and home.
Cable modem at home and DSL at work. They both had great download speeds
with the cable modem being blazingly fast from places like Microsoft. But
when using the VPN on either end from the other it was sloooooooow. I think
they were both limited to 128k uplink. --- Steve


"Bill Grant" <not.available@online> wrote in message
news:u$LY2$(E-Mail Removed)...
> It is worth noting that inbound traffic (ie inbound to the VPN server)
> will depend on the rate that the client can send. If the client has a slow
> uplink, that controls the throughput.
>
> "Steven L Umbach" <(E-Mail Removed)> wrote in message
> news:(E-Mail Removed)...
>> Keep in mind that your uplink speed is one fourth of your download speed.
>> Add into that the overhead of VPN with encryption and resultant extra
>> packet size and it will seem slow. I had a that same uplink speed at my
>> business and it was painfully slow. Also the thought of MTU adjustment
>> would be an adjustment with your DSL router - not your actual VPN
>> configuration with the server. I use a Netgear NAT router/firewall and I
>> can adjust the MTU on it which will not in any way affect internal non
>> WAN network performance. --- Steve
>>
>>
>> "Smart" <(E-Mail Removed)> wrote in message
>> news:(E-Mail Removed)...
>>> Thanks
>>>
>>> I followed step-by-step KB 323441 and I contend that there is no reason
>>> why
>>> it should not work 100%. There must be something else somewhere else I
>>> should check or uncheck. With a network of 130 users, I am not quite
>>> keen
>>> on suggestions which may affect in one way or another my environment. I
>>> would very much appreciate a helpful suggestion or at least the reason
>>> why I
>>> am experiencing this problem, and if I need to change anything in
>>> relation,
>>> for example, to the hardware. Of course, I remain at your disposal for
>>> any
>>> further information you may require.
>>>
>>> Regards
>>>
>>> "Steven L Umbach" <(E-Mail Removed)> wrote in message
>>> news:%23rpZL$(E-Mail Removed)...
>>> OK. See the link below for more details. MTU stands for maximum
>>> transmissiion unit and if it is too large you can end up with packet
>>> fragmentation that will slow down data transmission. The pppoe
>>> connectoid or
>>> the router device will have configuration settings to change the MTU
>>> size.
>>> Check your docs for what you are using. It may also help to contact your
>>> ISP
>>> if their support staff is on this planet. The manufactures of most
>>> routers
>>> will have their full manual on their website or a FAQ that may be able
>>> to
>>> help you out. --- Steve
>>>
>>> http://www.allaboutjake.com/network/linksys/mtu.html
>>>
>>> "Smart" <(E-Mail Removed)> wrote in message
>>> news:1bb801c4a729$aa6b4130$(E-Mail Removed)...
>>>> Hi Steve
>>>>
>>>> With all due respect, I didn't understand a thing you've
>>>> said. "tweak the MTU" and "around 1450 may be a good
>>>> place to start". I can't understand. I am sorry, there
>>>> must be something more straightforward and better than
>>>> that... :-D
>>>>
>>>> Regards
>>>>
>>>> >-----Original Message-----
>>>> >One thought is to tweak the MTU for your DSL connection.
>>>> You would have to check the device docs for instructions.
>>>> Make sure you document your current setting and change
>>>> the setting just a bit at a time. I think aroud 1450 may
>>>> be a good place to start. I don't use DSL anymore. ---
>>>> Steve
>>>>
>>>>
>>>> >"Smart" <(E-Mail Removed)> wrote in message
>>>> >news:0c3e01c4a6ff$a52f2c60$(E-Mail Removed)...
>>>> >>I used the following KBs to install and configure VPN on
>>>> >> Windows Server 2003 and XPs pro.
>>>> >>
>>>> >> How To Install and Configure a Virtual Private Network
>>>> >> Server in Windows Server
>>>> >> 2003http://support.microsoft.com/?id=323441
>>>> >>
>>>> >> How to configure a connection to a virtual private
>>>> >> network (VPN) in Windows XP
>>>> >> http://support.microsoft.com/?id=314076
>>>> >>
>>>> >> The data outbound is working fine and as expected, but
>>>> >> the inbound is very slow at 28kb/s, which is creating
>>>> >> kind of bottleneck in the connection adsl 512/128.
>>>> >>
>>>> >> Any help please ?
>>>> >>
>>>> >> Regards.
>>>
>>>
>>>
>>
>>
>
>