According to the configuration you added, all internet traffic would be routed to Router A. So, please be sure of that.Good that you have the same security commands.We are missing TCP state bypass here, so please add it according to the configuration...
Check for the default gateway on the machines you are trying to access across the VPN.1. If the default gateway is not set, please set it.2. If the default gateway is the Router's LAN interface IP address, everything should be cool.3. If it were some...