Thank you very much Mark. That is very helpful.
Is turning on Universal Plug and Play a good idea? Should I turn it off and
if so how?
Not sure what the change was but I did have recent Zone Alarm and Windows XP
updates, so either could be at fault.
Incidentally, subsequent to your kind response I checked the Zone Alarm
settings, and I see that I do have 192.168.1.1 in the trusted zone as "DHCP
and DNS servers". So this is weird and I will ask the ZA forum about it.
Jeff
"Mark Brown" <secured2k_anti_spam_@msn.com> wrote in message
news:Oo%(E-Mail Removed)...
> Hello,
>
> First an explanation of the message you are receiving...
>>> The firewall has blocked local network access to you computer [TCP Port
>>> 2869] from 192.168.1.1 [192.168.1.1][TCP Port 2175]{TCP Flags: S]
>
> 192.168.x.x is a private network block and in this case most likely is
> your own router (192.168.1.1).
> It is sending a SYN packet (TCP Flags: S) to try to open a connection
> using the router's temporary port range incrementally (port 2175, 2176,
> 2177, ect).
> That SYN packet to open a connection is going to your computer's port
> TCP/2869. This port has been known to be used by Microsoft Windows
> Universal Plug and Play (Automatic configuration of network devices,
> including computers, routers, and firewall settings).
>
> I have no idea what really changed in your configuration that would allow
> you to see such messages but this seems to be either a configuration error
> of ZoneAlarm or something turned on Universal Plug and Play in your
> computer and/or router recently.
>
>
>
> <(E-Mail Removed)> wrote in message
> news:(E-Mail Removed)...
>> Hi I am on a laptop running XP SP3, and have recently been getting
>> repeated Security Alerts from my Zone Alarm firewall. I was at the time
>> traveling and thought that the insecure hotel networks might have been
>> the problem, but I am now back home - using my home wireless network
>> which connects to the internet via a router - and I am still getting
>> these alerts.
>>
>> The alerts inform me that ZA has blocked incoming access to my PC and
>> have the following text:
>>
>> 1. The firewall has blocked local network access to you computer [TCP
>> Port 2869] from 192.168.1.1 [192.168.1.1][TCP Port 2175]{TCP Flags: S]
>>
>> 2. same but with [TCP Port 2176]
>>
>> 3. same but with [TCP Port 2177]
>>
>> What if anything should I do about this? I know I did not get these
>> alerts before I set out on this trip. I've checked for malware and for
>> viruses and am apparently clean.
>>
>> I have no idea what TCP Port 2176, 2177, or 2178 represent.
>>
>> Jeff
>>
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