I'm concerned that Zone Alarm had all these problems while other firewalls seemed to cope OK. Are there any other free personal firewalls you can recommend? Sally Taylor
The DNS fix randomises the source port used for DNS queries: it seems the Zone Alarm firewall assumed they'd come from only one port. That may well be a one-off problem, and if you're otherwise happy with the product, you may not gain anything by switching. This is particularly true if you have the paid-for version rather than the cut-down free version.
However, I prefer the Sunbelt-Kerio Personal Firewall for Windows XP. This starts as the full product but turns off its advanced features after 30 days, and nags you unless you pay for it. Comodo and Jetico also offer decent free firewalls. The final choice is partly a matter of taste.
