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[Lycan]

I'm leaning towards the modem as well. Auto negotation issue. See what other modems the ISP offers.

[judas_iscariote]

This smells like PMTU problem,

try this:

when the odd behavior happends, open cmd and type

Code: [Select]

ping www.google.com -f -l 1472

if ping does not fail, increase the 1472 number by one, till it fails. then you will see two different possible responses.

"packet needs to be fragmented but no DF is set"

or
"request time out "

if you see that latter message "Request timeout"  then your ISP is broken. to workaround it do this:

go to the router admin page, "Setup" then  "manual internet connection setup"

find the MTU box , there is a number there, substract 32 to it, save and reboot, try again.

[Lycan]

Good info. 

[judas_iscariote]

if you see that latter message "Request timeout"  then your ISP is broken

If this is really your case, I urge you or any other person that has this problem to change ISP ASAP, this is a frecuent but CRITICAL firewall misconfiguration, caused by sysadmins reading ill-advised security literature..

more info on this subject http://www.znep.com/~marcs/mtu

[fgl30]

This smells like PMTU problem,

try this:

when the odd behavior happends, open cmd and type

Code: [Select]

ping www.google.com -f -l 1472

if ping does not fail, increase the 1472 number by one, till it fails. then you will see two different possible responses.

"packet needs to be fragmented but no DF is set"

or
"request time out "

if you see that latter message "Request timeout"  then your ISP is broken. to workaround it do this:

go to the router admin page, "Setup" then  "manual internet connection setup"

find the MTU box , there is a number there, substract 32 to it, save and reboot, try again.

ok, I have "packet needs to be....." with 1473.... what about that? Thx

[judas_iscariote]

ok, I have "packet needs to be....." with 1473.... what about that? Thx

Then it is not the problem I have described. sorry, no idea then.

[AWDL]

ok, I have "packet needs to be....." with 1473.... what about that? Thx

So ping XXX -l 1472 worked and 1473 failed.

Then lower the MTU on your DIr-655 to 1472 (Internet> Manual...setup>MTU)

[midhenry]

Your post was not completely clear....
Do you see the problem on both wired and wireless connections?

I'm betting that the problem is only occurring when you are connected wirelessly, and that it never occurs with a wired connection. (This is what I see with my set up)

A perfectly good reason to see a message saying that the web page will not load is because you have lost your connection to the router (i.e. the wireless connection has failed)

If the problem is loss of wireless connection, I suspect you are a) out of luck, or b) in for lots of frustrating configuration hacks to work around the problem of the DIR-655 being very susceptible to interference (i.e. it's a design problem that may or may not be mitigated in particular circumstances by changing channels, fiddling with WISH controls, unchecking WMM Enable and/or Short GI, etc.  -  all suggestions provided to me by D-Link support without fixing the problem for me so far.)

[Lycan]

I have a feeling that the MTU adjustment did the trick for him.