3 edits | reply to anonagain
Re: Opera 10.10 keeps opening ICF ports - security issue? Just trying to clarify some things.
Webserver functionality of OperaUnite is disabled by default.
There is no way somebody will ever enable it accidentally since you will have to go through different steps in order to activate.
However Unite's Service Discovery is enabled by default.
quote:
UDP protocol is used over Port 1900 because the UDP protocol supports a "broadcast semantics" which allows a single UPnP announcement message to be received and heard by all devices listening on the same sub-network. TCP, being inherently a point-to-point connection-oriented protocol, does not support message broadcasts.
When UPnP devices wish to announce themselves, or "shout out" to find out what other UPnP devices are hanging around on the network, they issue a UDP message aimed at port 1900 of the special IP address [239.255.255.250]. This special "multicast" broadcast address has been set aside for UPnP devices and will be received by all of them listening on UDP port 1900.
If you have no use to Unite you can disable the service in Opera's Preferences Editor:
Uncheck 'Service Discovery Enabled'
You can also uncheck 'UPnP Service Discovery Enabled'
However if you don't use the Unite service you can simply uncheck 'Enable Unite'
This setting will overrule all OperaUnite settings no matter how they are set.
For network admins
"The system fixed file allows the system administrator to define settings that the individual user cannot override".
System administrator’s handbook
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Reality corrupted. Reboot universe? (Y/N) |
