[OSM-newbies] Difficulty in viewing OSM map - Where I'm up to (sadly)

[ael]

Ed Loach wrote:
> ael wrote:
> 
>> At one
>> time I suspected that packets were being blocked by my router
>> since
>> rebooting it seemed to clear the problem. I did check the
>> router log but
>> found no record of blocked packets.
>>
>> So I suspect there is a longstanding bug lurking (or router
>> incompatibility) which you may just have tripped over. So I
>> hope that
>> you don't give up, but your report helps to track it down. I do
>> recall
>> that "recentering" and then zooming often seemed to trigger the
>> problem.
> 
> Your mention of routers reminded me of a router problem discussed on
> the forums:
> http://forum.openstreetmap.org/viewtopic.php?id=2586

I had a quick look there, but I doubt if it is a  Syn Flood trigger 
because I think that would be recorded in my Linksys BEFSX41 firewall 
log. As far as I know, there is no open source firmware for that model: 
if there was, it would provide a good way of investigating the problem. 
But I would need to understand far more about the interaction between 
the servers and the browser and I don't have the time to look into this 
for now.

As I say, the problem is intermittent, although I do frequently find 
very long delays in loading tiles. I have wondered if some packets are 
being blocked, and then being loaded after a timeout. But it might just 
be the overloaded servers or restricted bandwidth.

> I don't know whether that relates, but I wondered if you had another
> router you could try?

I did have another router for a time but it may have been before I 
started using OSM. That router had problems with voip which 3Com 
couldn't solve (avoid them, then even charge for firmware upgrades!), 
but maybe sometime I could did it out and see whether the problem goes 
away. Not that I see it in a definite form very often these days.

ael