Are the arp requests from the affected workstations completing? Are the entries on the arp table on the FW and on the workstation? What does a wireshark sniff say?
Vista did the same behavior reaching out to a web site to determine if the Internet was available. I believe there is an option or a regedit to turn it off... On Sat, Sep 11, 2010 at 3:33 PM, <hay...@sages.us> wrote: > Thanks for the info, Tom. This will help. > > > Quoting "Steele, Thomas C" <tste...@manteno5.org>: > >> We have been seeing something similar off and on with our Win7 machines - >> the network & sharing center would show that we did not have a connection to >> the Internet, even though everything looked good in ipconfig /all and the >> system tray would have a warning symbol on the network icon. After some >> extensive internet research via google, I found a lot of possible causes... >> >> 1) It seems Vista and Win7 have some kind of "phone home" pinging >> mechanism that the OS uses to determine if it is reaching the Internet. If >> the sites or at least responses from those sites that the OS is looking for >> do not get returned to the workstation, then the OS assumes that it has no >> connection to the Internet, though internal connections to the LAN are fine. >> It is conceivable that a firewall/filter (such as IPCop) might be blocking >> the sites the OS is trying to hit to determine if it has Internet >> connectivity. If this is the case, it should show up in a wireshark trace >> but I have not tried it to confirm. >> >> 2) Some reported a specific issue with Symantec Endpoint Security (again, >> possibly related to Symantec's local firewall - we don't use Symantec so >> that was not our issue). >> >> 3) Apple's Bonjour service has been reported to cause this kind of >> activity (though it was not installed on the machines we were having issues >> with that I am aware of) >> >> 4) Problems with older versions of Intel's NIC drivers (ours were most >> recent, though) >> >> 5) Problems with IPv6. By default Vista and Win 7 have native support for >> both IPv6 and IPv4. If the rest of the network is only configured for IPv4 >> some have suggested disabling IPv6 on the client. This did the trick for us >> on one problematic workstation (running our access control software, which >> may also have been part of the problem). >> >> In our case this is very sporadic and seems to have pretty much gone away >> (maybe something fixed in a Windows update?). When it does occur, I have >> found that disabling and re-enabling the network connection seems to work. >> >> -TS >> >> >> -----Original Message----- >> From: tech-geeks-boun...@tech-geeks.org >> [mailto:tech-geeks-boun...@tech-geeks.org] On Behalf Of hay...@sages.us >> Sent: Saturday, September 11, 2010 10:07 AM >> To: Tech-Geeks Mailing List >> Subject: Re: [tech-geeks] Vista/7 not connecting to network >> >> For those of us who are using IPCop, it looks like it is time that we >> either find a solution for this issue - it arose in our district again >> last week with two new laptops running Windows 7 - or find a >> replacement for IPCop that does not have this issue. >> >> Now, if one of us comes up with a solution we need to agree so >> share........ >> >> >> Quoting Charlie Niehaus <cnieh...@altamont.k12.il.us>: >> >>> I have (soon had I hope) the same issue with Windows 7 and IPCop. >>> Never did find a solution. There are tohers that did not see the >>> issue with IPCop and Windows 7 - so I am assuming it is either a >>> configuration issue with IPCop (Best Bet) or somthing with a switch >>> along the way. i was lucky enough to solve it by giving the >>> computer in question an external IP and trusting the user (My >>> Superintendent) to not break any AUP rules. Not sure how that is >>> going though. >>> >>> ----- Original Message ----- From: "Jared Lynn" <jl...@porta202.org> >>> To: "Tech-Geeks Mailing List" <tech-geeks@tech-geeks.org> >>> Sent: Friday, September 10, 2010 12:19 PM >>> Subject: [tech-geeks] Vista/7 not connecting to network >>> >>> >>>> I'm hoping somebody on here has experienced this and has a solution >>>> to this very annoying problem. I have a couple of newly purchased >>>> windows 7 machines and a single vista machine that are trying to >>>> connect to get past my Router. DHCP hands out a valid IP and points >>>> to the right places but from there, the Default Gateway doesn't >>>> acknowledge that the machine exists. I can ping and access all >>>> internal servers but can not ping the Default Gateway. FYI, the >>>> Default Gateway is our CIPAFilter that has no problems with XP or >>>> OS X 10.6. Any comments or thoughts as to what might be occurring >>>> would be greatly appreciated. >>>> >>>> As always, You stay Classy Internet. >>>> Thanks, >>>> Jared Lynn >>>> PORTA CUSD #202 Technology Coordinator >>>> Email: jl...@porta202.org >>>> Phone: 217-501-4920 >>>> >>>> | Subscription info at http://www.tech-geeks.org | >>>> >>> >>> | Subscription info at http://www.tech-geeks.org | >>> >> >> >> >> >> | Subscription info at http://www.tech-geeks.org | >> | Subscription info at http://www.tech-geeks.org | >> > > > > > | Subscription info at http://www.tech-geeks.org | > -- "Don't ask yourself what the world needs. Ask yourself what makes you come alive and then go do that. Because what the world needs is people who have come alive." -Dr. Howard Thurman ****************************** Aaron Keith Hackney aa...@aaronkeithstudios.com Cell 210.325.2196 ****************************** | Subscription info at http://www.tech-geeks.org |
