# OpenVPN can ping both peers, but I can't reach any of the other machines on the remote subnet.

- Make sure that the firewall is not filtering the TUN/TAP interface.
- Make sure you have [IP forwarding](http://openvpn.net/index.php/open-source/faq/community-software-server/265-how-do-i-enable-ip-forwarding.html) enabled on the server.
- If you are using routing (not [ethernet bridging](wiki:BridgingAndRouting)), ensure the clients (or LAN gateway) have a route back to the server for the packets coming in over the tunnel. This can be achieved by:
  - Adding a route in your default gateway for the VPN network IP subnet pointing to the OpenVPN machine,
  - Adding a route to every client, or
  - NATing all VPN traffic to the local address of the OpenVPN machine for network traffic which leaves the OpenVPN machine for the local net.
- If you are hosting the OpenVPN server on an Amazon Web Services (AWS) EC2 instance, make sure "Source/Destination Checking" is disabled on the instance's Elastic Network Interface (enabled by default).

- If you are still stumped, use **tcpdump**, **wireshark**, or **WinDump** to determine where packets are being dropped.