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I'm having a persistent problem accessing certain websites. One of them is Southdowns Motorhomes This is'nt the first time this has happened & normally when I reboot my desktop & router the problem resolves itself.
My desktop is connected to the router via a LAN cable but there are also two lappy's connected wirelessly & the site in question is'nt available on either of these. One of these laptops is split new, has fully up to date AV & is browsing through Firefox.
This leads me to think it's an issue with my Buffalo router. Any ideas why most of the internet is accessible but some sites hang.
When trying to access the sites in question the address bar at the bottom of the page simply says "waiting on http" & stays like that until the page is closed.
I don't think it is your router unless you have put in some restrictions manually. Are able to access the router and look at the settings. You could try resetting to manufacturers settings - rebooting does not alter anything
______________________________________________________________ Richard
Happy Holidays to everyone for 2012
The above is only a personal opinion
Not sure if this helps, but there have been many problems on the Internet for the past week or so with certain domains "losing" their address. There seems to have been an attack on some name servers and one hosting company in particular had to take down their system and start it up all over again. Two of my own websites have suffered intermittent addressing problems.
All I can suggest is that when you do a retry, press <CTRL>F5 (that is the CTRL and F5 keys together) to flush your cache.
It should not come as a surprise that these problems have surfaced at the same time as the G20 conference!
Colin
______________________________________________________________ Colin - now enjoying retirement and the freedom offered by our motorhome.
you say when it happens it effects all three computers in the same way, hence it is likely to be something that's common to all three machines, i.e. your router, the infrastructure or the web server hosting the website.
i'd start by confirming that it is a common problem, say for example the desktop is your main machine, next time it happens, turn the laptops on and check to see if they have the same issue, if not it points to the desktop, if they do it points towards a common component as listed above. assuming all three are effected; reboot only the router and check all three machines again, if all three work as expected after rebooting the router, it pretty much confirms the router has the issue.
i'd check the MTU setting in the router, recently i have seen a lot of similar issues, although they normally have symptoms more like what's posted here < here > and the MTU setting has been at fault, by default it's normally around 1500, if you have access to the setting in the router i'd try lowering it to 1430.
Rebooting the router doesn't alter anything as in changing a setting, however it forces a reload and re-initialisation of all the firmware and software in the device as well as a renegotiation of the connection between the router and the isps systems. if a device is suspected as being problematic, especially if it has hung or halted, cycling the power should be the first port of call (including with computers), obviously if the issue keeps coming back then it's not a solution.
If dns resolution had failed you would receive a definate message stating that the page cannot be displayed, the window would be entitled cannot find server. you can test dns by typing 'ping www.southdownsmotorcaravans.co.uk' at the command prompt, if you get a message, amongst other things, stating 'pinging blah blah with 32 bytes of data' then dns has resolved ok, if it states something like 'ping request couldn't find host www.southdownsmotorcaravans.co.uk etc etc' then dns has failed, if nothing happens then it's more fundamental to the connection.
I had already reduced the MTU in the router to the Talktalk recommended maximum of 1432. This had'nt helped.
After further digging I discovered the MTU of my LAN was set to a default value of 1500 which appears to have been too high. I've reset this to the same value as I've got the router set to at 1432. Hey presto instant access to the webby's I couldn't get into before.
MY lappy's still not allowing mew access into the Southdown smotorcaravans site so I'll have to alter the MTU manually on this as well. It's running XP & it's a different proceedure for altering the MTU manually.
This leavs me thinking, is there a "check box" somewhere I haven't put a tick in which would allow the LAN to configure itself to the optimum MTU for the network ?
Regarding the operating system there isn't a user setting to adjust the mtu, it is normally done through the registry as i'm sure you are aware, there is however a free utility on the internet called 'DrTCP' as in doctor tcp, this provides a little user interface for adjusting the mtu and a couple of other similar settings, it doesn't need installing you simply download it and run it.
the above link is to the download, but there are a few websites around that provide documentation on what the settings are and how to determine the most appropriate for your environment etc. the ping utility is useful for dynamically testing mtu sizes when used with the '-l' and '-f' switches.
Lee
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p.s. it's very strange that you have needed to change the setting on the computer as well, normally if the computer is set at 1500 and the router at 1432, the expected behaviour would be that the data packets are sized at 1500 by the pc, sent to the router, the router should then chop them up at 1432 boundaries before forwarding them onto the internet, it appears for some reason your router isn't doing this.
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