Feeds

Mac OS X firewall blocks Skype and online gamers

You realise, of course, this means Warcraft

The Essential Guide to IT Transformation

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. ®

The Essential Guide to IT Transformation

More from The Register

next story
KDE releases ice-cream coloured Plasma 5 just in time for summer
Melty but refreshing - popular rival to Mint's Cinnamon's still a work in progress
Leaked Windows Phone 8.1 Update specs tease details of Nokia's next mobes
New screen sizes, dual SIMs, voice over LTE, and more
Secure microkernel that uses maths to be 'bug free' goes open source
Hacker-repelling, drone-protecting code will soon be yours to tweak as you see fit
Mozilla keeps its Beard, hopes anti-gay marriage troubles are now over
Plenty on new CEO's todo list – starting with Firefox's slipping grasp
Apple: We'll unleash OS X Yosemite beta on the MASSES on 24 July
Starting today, regular fanbois will be guinea pigs, it tells Reg
HIDDEN packet sniffer spy tech in MILLIONS of iPhones, iPads – expert
Don't panic though – Apple's backdoor is not wide open to all, guru tells us
Another day, another Firefox: Version 31 is upon us ALREADY
Web devs, Mozilla really wants you to like this one
prev story

Whitepapers

Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
Consolidation: The Foundation for IT Business Transformation
In this whitepaper learn how effective consolidation of IT and business resources can enable multiple, meaningful business benefits.
Backing up Big Data
Solving backup challenges and “protect everything from everywhere,” as we move into the era of big data management and the adoption of BYOD.
Boost IT visibility and business value
How building a great service catalog relieves pressure points and demonstrates the value of IT service management.
Why and how to choose the right cloud vendor
The benefits of cloud-based storage in your processes. Eliminate onsite, disk-based backup and archiving in favor of cloud-based data protection.