Vista and some Linksys routers/firewalls = stalled sessions (Workaround)

There have been some reports on the Internet about networking problems after installing Vista. If you are having trouble getting IMAP/POP3 mail or trouble using RDP with Vista and are behind a Linksys router/firewall, try this under Vista:

“netsh int tcp set global autotuninglevel=disabled”

If your networking problem goes away, it is due to a bug in MANY Linksys devices.
So far, most reports are coming from RV042 and RV082 devices, but it seems pretty widespread in general.

Linksys has a beta firmware available for the RV082 that fixes this problem.

Once you install the updated firmware, you can re-enable auto tuning with:

“netsh int tcp set global autotuninglevel=normal”

Thanks to my friend Tom for pointing this message thread about it here.

I'm sure other devices/stacks might have trouble as Vista gets deployed more widespread. Time will tell.

Posted by Aaron Tiensivu in Vista at 14:21 | Comments (4) | Trackbacks (0)

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I can verify this or something similar. I've got an IMAP server (kerio) running behind a Linksys WRT54G (DD-WRT SP3 firmware) at home. I'm testing Vista RTM at work and can't reliably access my IMAP server from Vista using either Thunderbird (which actually crashes) or Windows Mail (just times out.. occasionally gets an email or a header)

Local IMAP to my work Cyrus IMAP server works fine in both clients.

Disabling auto-tuning as described has not helped... though I haven't rebooted yet. If a reboot works, I'll post again.

#1 Joe on 2006-12-15 13:31 (Reply)

after hours of looking for solution, this hit the spot. we have an RV042 and ultimate vista. havent upgraded the firmware yet. thanks for the post.

#2 Chris on 2007-09-02 03:58 (Reply)

Am i supposed to put that line into DOS prompt or something? if so, it gave me a line saying "request needs elevation"

*grumlbes* stupid Vista...

#3 Nick on 2008-02-10 14:56 (Reply)

"Request needs elevation" means you need to run it with admin rights. Launch CMD with administrator rights - easiest way is to enter 'cmd' into 'Start Search', hold down [ctrl]-[shift] and hit [Enter].

#3.1 Aaron Tiensivu (Homepage) on 2008-02-10 14:58 (Reply)

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