Member Avatar for RNeubig

Hello,
This problem is similar to others that I've seen posted but nothing was quite the same and the solutions that I've tried (e.g. rebooting or upgrading router) didn't help.

When connecting to the net from home, I can get to any web site that I want to just fine except those in the med.umich.edu domain (e.g. http://med.umich.edu). Using two other computers running XP at the same place, I can get in just fine. Also, when I am at work - and connecting within the internal network - it works fine. Also if I tunnel in via VPN, I can see them as well.

At home, I am accessing the web via a wireless card and ATT-DSL via a 2wire 2701HG-B Gateway and see the same problem whether I use FIrefox or IE so I think it is a system problem. Also, if I use a wired connection to my router rather than wireless it still doesn't work. Finally, when I connect from other sites at the University of Michigan outside of the Med School firewall, it doesn't work either.

Unfortunately, the UM Med School doesn't support Vista (I can see why with these problems) so it is hard to get help from them. I just tried upgrading to the Vista SP1-RC and that didn't fix the problem.

I suspect that this is something related to local vs internet security. I tried adding one of the sites to the "trusted sites" list but that didn't fix it. So, I'm out of ideas at this point.

Any suggestions would be welcome.

Thanks much,
Rick Neubig

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  • Latest Post Latest Post by chris5126

Dani AI

Generated

Brief summary and focused next steps for ’s Vista-only failure to reach the Med School domain. Because XP machines on the same network can connect, this points to a client-side issue on Vista (name/address selection, protocol preference, or the Windows TCP/Winsock stack) rather than a router or site-side block. Earlier suggestions from and about checking local network and campus policies are reasonable; the diagnostics below target Vista-specific layers that were not yet checked.

Useful checks to run from an elevated Command Prompt on the Vista laptop:

ipconfig /all
nslookup med.umich.edu
nslookup -type=AAAA med.umich.edu
ping -4 med.umich.edu
tracert -4 med.umich.edu
ipconfig /flushdns
netsh winsock reset
netsh int ip reset resetlog.txt
netsh interface tcp show global
netsh interface tcp set global autotuninglevel=disabled
route print

How to read the results and targeted actions: if name resolution returns only IPv6 (AAAA) while XP resolves IPv4, force IPv4 or disable IPv6 in the adapter properties temporarily. If a tracert to IPv4 stops early on Vista but not on XP, examine route print for stray static routes or IPv6/IPv4 source-address selection issues. If the site responds to an IP-entered URL but not by name, focus on DNS (hosts file and local resolver cache). Winsock/TCP resets require a reboot and often clear corrupted client-side filters inserted by third‑party security software; third‑party AV/web‑filter drivers are a common Vista-only cause. If the problem persists, a packet capture (Wireshark or Microsoft Network Monitor) will show whether the client sends requests and whether the server replies or sends RSTs—this gives definitive evidence for routing vs. protocol mismatches. Caution: administrative privileges are required for many commands and any temporary disabling of IPv6 or security software should be reversed after testing.

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All 9 Replies

Member Avatar for bobbyraw

is this a laptop, or desk top. are you able to access the site on this same vista pc when u take it to school or work??????

Member Avatar for RNeubig

Thanks! It is a laptop and I can access the med.umich.edu sites fine from work (at least within the Med School firewall). If I go to the main University sites where I am outside the Med School firewall it does not work.
Rick

is this a laptop, or desk top. are you able to access the site on this same vista pc when u take it to school or work??????

Member Avatar for bobbyraw

can i safely assume these are all wireless connection. go into IE and change the security setting for local intranet. set every thing to dafault. and try to connect. then on the connection tab ensure that no proxy setting are enable, do you have any firewall on the computer. disable then try connecting after changing all setting.

Member Avatar for RNeubig

Thanks for the suggestions. I'm afraid they didn't correct the problem.

can i safely assume these are all wireless connection. go into IE and change the security setting for local intranet. set every thing to dafault. and try to connect. then on the connection tab ensure that no proxy setting are enable, do you have any firewall on the computer. disable then try connecting after changing all setting.

Member Avatar for bobbyraw

did you disable the firewall?........can you log into your router?, see if the ip/domain is blocked. the other PC that can access the site from home, check the internet setting on them and match this vista pc to it.

Member Avatar for chris5126

sometimes workplaces /universitys etc block content unless your within their local network or have dialed in using vpn etc my uni does it and will only let me access certain content unless within their network. Check with them they will be able to tell you.

Member Avatar for RNeubig

I don't think that is the case since I can get to the web site fine from an XP computer connected via the same external connection.

Member Avatar for bobbyraw

was the laptop configured by anyone on campus, did they give you any settings to use to get acces to the site

Member Avatar for chris5126

yer it doesnt sound like a vista specific problem more like a config problem and if vista isnt supported yet by your campus then you probably have little or hope!

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