Feeds

Mac OS X firewall blocks Skype and online gamers

You realise, of course, this means Warcraft

The Power of One Infographic

The list of problems with the firewall bundled with Mac OS X Leopard operating system is growing.

Not only is Leopard's firewall deactivated upon installation it also trips up Skype and online gaming applications. Both German security news service Heise and security blogger Rich Mogull encountered the problem, the latest in a series each has discovered with the firewall.

Mogull traced the issue to the firewall's (application security) code signing features. Leopard signs applications on launch that aren’t already signed via Apple. The approach is designed to create a mechanism to block malware from altering executable files.

Unfortunately, some applications, such as Skype, may change as they run. This can cause a signature mismatch, and a refusal by the firewall to allow the application to run. Reinstalling the application fixes the problem, but is hardly convenient.

Heise has a similar diagnosis of the problem, which has also affected World of WarCraft gamers, it notes. Postings on World of WarCraft forums suggest a reinstall of the game is needed to get around the bug.

In personal firewalls for Windows with application firewall settings, such as Zone Alarm, users with admin privileges can manually change program privileges. Apple's failure to include something similar in Leopard's firewall in causing problems for some, but by no means all, users.

Reg Hardware editor, Tony Smith, who recently carried out a review of Mac OS X Leopard, reports that he was able to get Skype operating through the new firewall without any problems. ®

Seven Steps to Software Security

More from The Register

next story
Whoah! How many Google Play apps want to read your texts?
Google's app permissions far too lax – security firm survey
Chrome browser has been DRAINING PC batteries for YEARS
Google is only now fixing ancient, energy-sapping bug
Do YOU work at Microsoft? Um. Are you SURE about that?
Nokia and marketing types first to get the bullet, says report
Microsoft takes on Chromebook with low-cost Windows laptops
Redmond's chief salesman: We're taking 'hard' decisions
EU dons gloves, pokes Google's deals with Android mobe makers
El Reg cops a squint at investigatory letters
Big Blue Apple: IBM to sell iPads, iPhones to enterprises
iOS/2 gear loaded with apps for big biz ... uh oh BlackBerry
OpenWRT gets native IPv6 slurping in major refresh
Also faster init and a new packages system
prev story

Whitepapers

Top three mobile application threats
Prevent sensitive data leakage over insecure channels or stolen mobile devices.
The Essential Guide to IT Transformation
ServiceNow discusses three IT transformations that can help CIO's automate IT services to transform IT and the enterprise.
Mobile application security vulnerability report
The alarming realities regarding the sheer number of applications vulnerable to attack, and the most common and easily addressable vulnerability errors.
How modern custom applications can spur business growth
Learn how to create, deploy and manage custom applications without consuming or expanding the need for scarce, expensive IT resources.
Consolidation: the foundation for IT and business transformation
In this whitepaper learn how effective consolidation of IT and business resources can enable multiple, meaningful business benefits.