Firewall setting and inability to renew IP address?

I have a 3-pc home wireless LAN, WPA protected, that connects to the
internet through a router and cable modem. All are XP Home systems.

Has been working with no problem for almost a year and now, "suddenly",
although the wlan has no problem (can connect and see all PCs fine), on one
laptop, the ip cannot renew itself properly. This demonstrates itself in
that when the laptop goes into hibernation and then restores itself, very
often it loses its internet connection (LAN remains on) and refresh usually
does not work requiring a reboot.

In searching for a possible cause I am now focusing on my Zone Alarm
firewall as the possible cause because a fresh installation of Zone Alarm
seems to have occurred during a recent ZA update. So I had to reset again
all the program permissions in ZA.

Looking into the ZA settings, I notice:
- the wireless adapter is in the internet Zone, but in the "advanced
settings" there is are 2 options that are not selected (the default) and I
wonder if they might be the problem. Before setting them to selected, I am
asking for help in case these are dangerous to select. They are
a. "Allow Outgoing DNS/DHCP in Trusted Zone on High setting"
b. "Allow Outgoing DNS/DHCP in Internet Zone on High setting"

Could these be the problem and should I select one or the other? Would that
be safe?

Jeff


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Relevant Pages

  • Re: AD DNS naming
    ... my e-mail and Site Internet." ... infrastructure (mostly with respect to DNS and VPN). ... If you do not select this option and go with scenario 2 ... Each DNS zone is authoritative for the zone of that ...
    (microsoft.public.windows.server.dns)
  • Re: How many Global Catalog Servers are needed?
    ... make for an AD DNS FQDN domain name, ... external Internet you need scenario 1, although it is the most DNS-intensive ... Each DNS zone is authoritative for the zone of that name so ...
    (microsoft.public.windows.server.active_directory)
  • Re: .com versus.local
    ... DNS and public names on the internet etc but I have never had someone ... All DNS entries are help at the ISP. ... external Internet you need scenario 1, although it is the most DNS-intensive ... Each DNS zone is authoritative for the zone of that name so ...
    (microsoft.public.windows.server.dns)
  • Re: DNS domain name same as AD domain
    ... Or should I change the DNS domain first to something else? ... For any host name that you wish to have access from both your internal network and from the external Internet you need scenario 1, although it is the most DNS-intensive over time. ... Each DNS zone is authoritative for the zone of that name so therefore the external DNS zone and internal AD/DNS zone will NOT replicate with each other thereby prevent internal company records to be visible to the outside Internet. ...
    (microsoft.public.windows.server.dns)
  • Re: Domain naming strategies
    ... a delegation to an unreachable internal dns server. ... my e-mail and Site Internet." ... network and from the external Internet you need scenario 1, ... Each DNS zone is authoritative for the zone of that name so ...
    (microsoft.public.windows.server.active_directory)