Network.security.ports.banned
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Background
Ports are used when any program accesses the Internet so that the system can keep separate applications' data separate. Some port numbers are reserved for functions such as e-mail or FTP. To prevent potential security risks if a protocol was allowed access a port reserved for a seperate protocol, Gecko applications contain a list of banned ports. This preference allows you to augment the list of banned ports.
Possible values and their effects
A comma delimited list of port numbers to additionally block.
Caveats
- This preference does not exist by default.
- Some protocols are allowed to override the banned ports.
- Blocking a port requested by the application will result in the message "Access to the port number given has been disabled for security reasons." and the connection will fail.
First checked in
Has an effect in
- Netscape (all versions since 6.1)
- Mozilla Suite (all versions since 0.9.1)
- Phoenix (all versions)
- Firebird (all versions)
- Firefox (all versions)
- SeaMonkey (all versions)
Related bugs
- Bug 83401 - %0a and %0d are unescaped -> malicious link can send mail
- Bug 85601 - User interface to allow connections to blocked ports
