Why does my computer self-assign an IP address whenever I rest the network?

All of a sudden both my wife's and my MacBook Pro dropped their internet connections (Verizon FIOS). I spent a long time with the Verizon tech person and he suggested that I post here.
My computer is running Mountain Lion and my wife's is running Lion.
Thanks.
Jon

Rest the network? Why would you do that? It's not like it builds up lactic acid. Actually turning electrical devices on/off can actually degrade performance/reliability over time.
When MacOS loses connection with the network it will self-assign an IP address.. see above. Turn the network back on, and I suspect it reconnects. No?
If you recently upgraded to M/L I suggest you go into System Preferences/Network, delete the Wifi service ("-") and then recreate it ("+"). Do the same with the Ethernet service connection. Also, use WPA2 for router/network security.
Then repair permissions.
BTW, I use Verizon FIOS and experience no problems.

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I think I already disabled all the updating functions, yet, SOMETIMES when I start Firefox, (with about:blank), my network monitor shows one to five connections to IP addresses mostly in the 74.125.225.x, 74.125.227.x, 74.125.228.x, and 72.21.x.x ranges. Those ranges include Google, Amazon, and Youtube.
I use Kaspersky, and have scanned multiple times for malware, and even had their technical support look into my computer. They see no malware. It is the Kaspersky Network Monitor that revealed the problem.
As I find them happening, I try to jot down the addresses, (quickly, because some of these connections only last a second or two), then add those to a firewall rule I created to try to combat the problem. Yet, next time I start, new addresses are "attacking". Of course, some get away, because I don't get the address jotted down before it goes away. At one point I used masking that ended up keeping me from Google and Youtube, so I have to add the addresses individually, and my block list in that one rule is 13 items long now. The only IPs not in those ranges are 23.5.251.27, and 173.194.46.5. Not sure where those go.
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I should not have to do all that. Firefox should start and just sit there quietly until I start clicking or typing in it. This has been happening in Firefox versions going back to 11. May have gone on before that, but I wasn't tracking it then.
Also, it doesn't always happen, or, more precisely, with addresses I have not already blocked, (because my only way to know it's happening is when the connections are allowed to be made). It does not always happen right after Firefox is up, but sometimes several minutes later. I have started Firefox and just sat and watched the network monitor without doing anything in Firefox, and have seen this happen up to 15 minutes after I start Firefox ... mostly just two or three minutes when there's a delay at all.

Firefox does not do anything but sit on about:blank after I start it as long as I have a firewall rule enabled that completely blocks these subnets:
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While the above rules are in place, I do not have access to Amazon, Youtube, or Google, (or any of the various blog sites and services sponsored by Google, including Google Maps and Gmail). That list may not be complete, as I have other firewall rules in place that mainly block individual addresses.
It seems to me as simple as; figure out who owns those subnets, and you have your bad guys. Then go after them.
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I looked at the suggestion above for OS changes for logging HTTP activity, but the author neglected to include instructions for backing out these changes after using them. If this were to create more jewels in a drawer the thief has access to, reformatting and restoring my drive is not the kind of back out process I enjoy. Therefore it would be foolish to apply them. To me it would be like bungee diving with no bungee. Fun until you hit the bottom. Give me the bungee, let me make sure it's short enough, then I'll dive.

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2011-11-17-085303.panic
Thu Nov 17 08:53:13 2011
panic(cpu 2 caller 0x00143764): "zalloc: \"kalloc.4096\" (311818 elements) retry fail 3"@/SourceCache/xnu/xnu-1228.15.4/osfmk/kern/zalloc.c:966
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0x7ef4f8d8 : 0x143764 (0x4614d8 0x460150 0x4c20a 0x3)
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0x7ef4fa98 : 0x3bfd28 (0x2b9317f8 0xaa02904 0x0 0x0)
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Mac OS version:
9L30
Kernel version:
Darwin Kernel Version 9.8.0: Wed Jul 15 16:55:01 PDT 2009; root:xnu-1228.15.4~1/RELEASE_I386
System model name: MacPro1,1 (Mac-F4208DC8)
System uptime in nanoseconds: 145228120280331
vm objects:5850460
non-kernel map entri:1264428
kernel map entries:8462300
pv_list:1851864
kalloc.16:5443584
kalloc.32:81367040
kalloc.64:63418368
kalloc.128:2445312
kalloc.256:80748544
kalloc.4096:1277206528
kalloc.8192:2015232
vm pages:66613448
ipc ports:1197700
MAC Labels:1326168
vnodes:5018400
namecache:1644240
HFS node:6737024
HFS fork:2779840
buf.4096:2920448
buf.8192:56360960
Kernel Stacks:1785856
PageTables:29204480
Kalloc.Large:11616404
unloaded kexts:
com.apple.iokit.IOUSBMassStorageClass          2.0.8 - last unloaded 78388390721999
loaded kexts:
com.symantec.kext.fw          1.0.3f5
com.symantec.kext.confidentialData          1.3f44
com.symantec.kext.filesecurity          1.3.3f65
com.symantec.kext.SymAPComm          11.1.2f17
com.symantec.kext.pf          4.1.1f13
com.symantec.kext.ips          3.2f8
com.symantec.kext.internetSecurity          1.3.2f5
com.apple.driver.iTunesPhoneDriver          1.0 - last loaded 78264274723293
com.apple.iokit.IOUSBMassStorageClass          2.0.8
com.apple.filesystems.msdosfs          1.5.5
com.apple.driver.AppleHWSensor          1.9d0
com.apple.filesystems.autofs          2.0.2
com.apple.driver.AppleUpstreamUserClient          2.7.5
com.apple.driver.AppleHDA          1.7.1a2
com.apple.iokit.IOBluetoothSerialManager          2.1.9f10
com.apple.GeForce          5

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