Open Cobalt uses a number of network services that you may have to poke holes in your firewall for or make changes to the network configuration, depending on how strict your network security is and the services of Open Cobalt that are actually used. For more detail, check the rest of the Admin guides. - If you want to make your internal spaces available to external peers, the configuration is more complex and you will need to look at the router configuration documentation
- Port numbers listed are for default configured in services and may change.
External Service and Port UsageThese are services that an Open Cobalt installation may try to connect to on the greater Internet.
| Application | Protocol
| Ports | Direction | Usage | | DNS | UDP/TCP
| 53 | outgoing | Jabber-based chat and Space Directory clients try to use the Google caching DNS service at 8.8.8.8 or 8.8.4.4. Reconfigurable in browser config. Also used to do DNS based Service Discovery when looking for a dispatcher.
| HTTP
| TCP | 80 | outgoing | Version check, ad-hoc space registry, web space load
| | LDAP | TCP | 1389 | outgoing | Space Directory access. Reconfigurable in General Preferences.
| | XRFB/HTTP | TCP | 5899 | outgoing | Xrfb/VNC application service, control protocol. Reconfigurable in General Preferences. | | VNC | TCP | 5900-5930 | outgoing | Xrfb/VNC application service, interaction protocol
| | XMPP | TCP | 5222-5223 | outgoing | Jabber-based chat.
| | TeaTime | TCP
| 6900-6909 | outgoing | P2P connection to external routers and spaces
| | TeaTime | TCP | 6900-6909 | incoming | P2P connection from external peers to internal router/space. See router configuration documentation |
Internal Usage These are the services that Open Cobalt may try to utilize on the local network.
| Application | Protocol | Ports | | Usage | | DNS | UDP/TCP | 53 | | Many services will use the DNS server the OS hands it, usually some internal one that is given to the OS via DHCP
| SSDP/UPnP
| UDP | 1900
| | Discovery protocol to find a UPnP Internet Gateway Device (IGD) router for the automatic port forwarding configuration of the Open Cobalt message routing. Multicasts on address 239.255.255.250. Also used to find non-local dispatchers on the same network segment. | | CRQT | UDP | 43215 | | Private discovery protocol for the spaces. It broadcasts
on 255.255.255.255 so it shouldn't go outside the local net. | | SOAP/UPnP | TCP
| device dependent
| | If it finds a UPnP IGD then it will use the SOAP based UPnP protocols to try to configure an external port
forward. |
| 
