Telkoms network topography and shaping

[Daveogg]

I saw something interesting this morning at around 8:45.
All local issues seemed cleared.
International was very strange.
Browsing (http) was normal and i could browse all sites. Unfortunately i only thought afterwards to check https. edit just done it again and https is blocked.
All other access was completely blocked. News 119 - would not connect.
Skype could not connect.
Ftp could not connect.
Pings to international sites gave time outs yet i could browse those same sites that i could not ping???? I thought prehaps i was seeing the page proxied but even the most obscure sites could be browsed.

This was intermittent it happened 3 times lasting about 10 mins each, then settled back to what i have been used too since getting adsl.

So i concluded that saix is splitting the network into port 80 traffic and other traffic which is then routed differently. It seems the "non 80" route is down atm.

By splitting the traffic are they going to allocate a small percentage of the available bandwidth to the "non 80" route and therefore negate any attempts to bypass the shaping by using proxies?

 

[asmith]

International Port 80 goes via their forced proxy server.

 

[Daveogg]

Yea sure its proxied but if the content is not on the proxy server and the request need to be made to the international server does that follow a different route compared to say a ping request?
It seemed very much like their were two seperate networks one for port 80 stuff which was working and one for the rest which was intermittant.
Again how could i browse a site that gave time outs to ping? www.bbc.co.uk

 

[Clipse]

port 80 goes via the transparent proxy, whenever the main pipe is down the transparent proxy will route you to backup pipe, this is why port 80 access still worked and no other access.

 

[Daveogg]

Thanks clipse makes perfect sense now.

 

[fragtion]

this is why port 80 access still worked and no other access.

IRC (TCP port 6667) worked perfectly fine for me and is not routed through any proxy AFAIK ???

 

[jgordon]

IRC (TCP port 6667) worked perfectly fine for me and is not routed through any proxy AFAIK ???

That's probably because you are using a local server. Only international was affected by this problem

 

[Clipse]

Well we were refering to international the whole time, or did I miss something? ;p

 

[jgordon]

Well we were refering to international the whole time, or did I miss something? ;p

No, I believe fragtion_ was using a local IRC server. I'm sure oversees ISP servers had the problem.