What's New in Director 8.5 > The Server Application > Troubleshooting |  |

Troubleshooting

The following are three common issues you might encounter when configuring and using the server:

| Connection attempts are blocked. This usually means that the user is behind a firewall that is not configured to allow outgoing connections on the port that Shockwave uses. Contact your network administrator to adjust the firewall settings to allow outgoing TCP/IP connections on port 1626. Client movies running behind firewalls need to be able to make outgoing connections through the firewall in order to communicate with the server. Clients movies acting as peer hosts will need the firewall to allow incoming connections.
| Large messages are not getting through the server. This usually indicates that the client's or server's message buffers have not been set large enough to handle the size of the messages you are sending. You can change this setting by editing the `MaxMessageSize` parameter in the Multiuser.cfg file. You may also need to use `setNetBufferLimits` to adjust the Xtra's buffer sizes in your movie's Lingo scripts.
| Proxy servers can interfere with the Shockwave Multiuser Server or multiuser movies that act as peer hosts, since the host uses the clients' IP addresses for routing messages. Director movies or servers running behind a proxy server may have difficulty making connections and sending messages because the proxy server may mask the real IP addresses of the movies.