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Site to Site VPN and Remote VPN

I have a main office (A) with 40 Mbps ADSL internet line and one branch office (b) with 512 kbps internet line in UAE and one office in saudi with 512 kpbs internet line

office (b) cannot upgrade the internet speed because of the service provider but can use 3g USB dongle internet

presently we have two draytek router in office A and B and using the DYNDNS service we have established a site to site vpn to access file across and access software based and webbased ERP from Main office .The accessiblity is a diaster.

from the ISP side only option i have is to go for 3G USb with 7.2 Mbps internet line

just upgrading the internet line with boost the speed with the same draytek 2820 router vpn or we have to choose any other router like cisco,sonic wall or fortigate

please suggest a suitable solution with 40Mbps ADSL (DHCP Ipaddress) and 7.2 Mbps 3G usb modem where i have a descent access on the file and software
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Kash2nd Line EngineerCommented:
the draytek in question is more than capable for what you are wanting it to do so I would stick to it.

If I were you where the internet is not so fast, instead of having site to site VPN, i would just have a dial in VPN access when people needed to access file server. that way you are saving valuable bandwidth.

or the other option would to be have a local replica of shares on each site. no need to put expensive servers in, a NAS could do a good job. it all depends on how big the company is.
ManojPSAuthor Commented:
Thanks Innocentdevil with the 3g modem connection of 7.2Mbps will it increase my perfomance and can you suggest that with old dsl internet connection is it possible to route only my access to normal internet ,emails and other stuff and dedicate the 3g connection only for VPN Access as here there is a download limit for 3g modem an beyond the limit the charge is not effortable
Kash2nd Line EngineerCommented:
may be. I would do a speed test on 3G modem. is it a dedicated line, if it is, then you should be getting full 7.2 Mbps and in that case you should be able to route VPN access to that modem. hope this helps
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