VPN Help


Hello there,

I have a adsl speed of 256kbps in one branch office and at present i can connect via vpn to the HO to run java application(i have written for the company) without problem.now i have added another machine to this branch office and also want this machine to connect via vpn to the HO but it gets stuck on the verifying username/password window.what could be the reason.is the bandwidth i.e 256 not sufficient for it.
the HO server is windows server 2003 and the branch office have win xp.
for vpn connection how many users can concurrently connect to the HO server.
please help
zolfAsked:
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SteveNetwork ManagerCommented:
what sort of router/modem do you have ? (ive seen routers that only allow 1 x passthrough vpn connection at a time)..

to test if its your router/modem.. disconnect the machine that works, and try to connect the 2nd machine only.. if it works, then the original machine shouldnt be able to connect again..

if this is the case you'll need to to get a different router/modem
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SteveNetwork ManagerCommented:
Im sorry.. You've posted this in VNC..

VNC only allows access by default on port 5900 and only allows 1 x simultaneous connection.. If you want more than one person to use remote VNC you'll either have to setup another machine at head office to take control of (on a different port  eg 5901), or implement a proper VPN solution..

even using pptp to a windows server would suffice..
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zolfAuthor Commented:

to test if its your router/modem.. disconnect the machine that works, and try to connect the 2nd machine only.. if it works, then the original machine shouldnt be able to connect again..

yes when i disconnect the first machine the second machine can connect.could it be related to my adsl speed and bandwidth or it should not be a problem for 2-3 machine to connect via vpn to the HO server

one question with this speed of 256kbps which i have can it handle more then one vpn connection.
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SteveNetwork ManagerCommented:
well there you go.. its your modem/router then..  you'll need to get a different one..

no its not related to the speed.. ive connected 10+ users to a 256kb ADSL connection before.. they run slow.. but they do connect..

depending on the applications you're running and the bandwidth they require determines how many users you can run.. if you are just serving java pages that they load directly via their local machines you shoul dbe able to run 10 users easily.. so long as the remote site isnt using all the bandwidth of course :)
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zolfAuthor Commented:

the adsl modem i have is asus am602
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SteveNetwork ManagerCommented:
question though.. are you using VNC ?

if you are.. then see my second post from the top..
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zolfAuthor Commented:

>> so long as the remote site isnt using all the bandwidth of course :)

the remote server have adsl speed of 512.how can i check the bandwidth useage of the HO and the branch office.
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zolfAuthor Commented:

>>question though.. are you using VNC ?
>>if you are.. then see my second post from the top..

it is VPN connection of windows server 2003.i mean the VPN we are using is of default windows.we are not using third party VPN
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SteveNetwork ManagerCommented:
ok cool

You also have to remember that normally 512Kb ADSL is 512Kb download speed but only 128Kb upload speed.. which means there is only 128kb available to send out to your remote site.. so 256kb download (64kb upload) (normally) would be fine.

to check how much usage normally you would contact your ISP and ask for access to SNMP graphs for usage stats etc.. or setup your own SNMP monitoring server using something like MRTG or PRTG (http://www.paessler.com/prtg)

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zolfAuthor Commented:

thanks mate
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