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461 posts

Ultimate Geek
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Topic # 52670 5-Dec-2009 10:41
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Some users might be aware of folding@home, a distributed computing programme run by the Pande Group at Stanford University, which utilises spare CPU resources to fold proteins in the search for cures to a wide range of diseases & illness.

Users may not be aware of a new project by the Pande Group is seeking to utilise spare HDD capacity, called Storage@home. Information for this new project can be found here: http://en.fah-addict.net/articles/articles-6-20+the-plan-for-splitting-up-data-in-storage-hom.php

During the testing of S@H, I have been in communication with the developer of the project, because he's noticed my system hasn't been communicating properly. The project communicates via port 300, and ascertains connectivity via pings & pongs. Having shared my application and firewall logs with him, we've concluded that while my system is receiving the pings from Stanford University and has processed them properly, they are unable to be returned to the Stanford servers.

This has left us wondering whether there is an ISP level issue which is causing the data to not get returned to Stanford. Perhaps the data is being blocked, either because it is a ping, or because it is using port 300.


I would appreciate any help on the situation and I am willing to provide application and router logs, as well as my correspondence with the Project Designer. Folding@home and now Storage@home are the two main reasons why I've moved to Big Time; the use of bandwidth for a such a positive and legitimate purpose.

I understand that some Telecom staff members regularly look at these forums, so it'd be great and I'd greatly appreciate it if they could help get the ball rolling to see whether there is something they can do to facilitate improving connectivity to allow other Telecom users to participate in this project. I'd also like to share any information/advice with the project manager, so that it may help them in rolling the project out to users of other ISPs around the world.


Kind Regards,

k1wi

Edit: details about storage@home and how to participate/further info on how it works can be found here: http://foldingforum.org/viewforum.php?f=56, if that helps.

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Uber Geek
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  Reply # 279504 5-Dec-2009 10:45
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Have you tried to telnet to that port from your pc?



461 posts

Ultimate Geek
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  Reply # 279510 5-Dec-2009 11:06
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I haven't tried to Telnet from my Computer (Unfortunately atm I'm offsite & it's a win7 PC so I can't SSH to it.)

One specific log in my router firewall which is of particular interest is below:


---
FIREWALL icmp check (1 of 1): Protocol: ICMP Src ip: 171.67.108.22 Dst ip: 125.238.251.192 Type: Destination Unreachable Code: Communication with Destination Host is Administratively Prohibited
---

 
 
 
 


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Ultimate Geek
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  Reply # 279544 5-Dec-2009 13:48
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I've fired this post as an email around a couple of people I know within Telecom who maybe able to help. WIll let you know what I hear.




The comments I write on this forum do not necessarily reflect the views of my employer and as such cannot be taken as official statements of my employer.



461 posts

Ultimate Geek
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  Reply # 279545 5-Dec-2009 13:50
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Thanks Neal, I appreciate your quick assistance!

On a Saturday none-the-less!

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Ultimate Geek
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  Reply # 279683 6-Dec-2009 08:49
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That firewall entry appears to be saying that ICMP packets are restricted inbound on your modem. The src is the stanford IP and the dst is a telecom broadband IP (yours at the time?). Is your modem setup to allow ICMP echo requests/replies from the internet?

Is that a requirement of S@H?

Paul




meat popsicle



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Ultimate Geek
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  Reply # 279695 6-Dec-2009 10:21
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I thought that that might be the case too, but the S@H developer told me that having looked at my logs the application was receiving the pings, just unable to get them back out.

Which has me wondering whether src means the origin on the ping request (to which my network/router is replying to...) It's counter intuitive, but I'm at the limit of my technical knowledge

Also, it could be that that firewall entry is a red herring as I understand all the trafic occurs over the 300 port.

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Ultimate Geek
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  Reply # 281084 10-Dec-2009 06:02
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As a matter of interest i installed the monitor, opened the port on the firewall and got the same result as you.

I installed it on a centos5 server so its not the same as your environment but that should be fine.

To resolve mine not working all i had to do was modify my client firewall to allow UDP:300, as soon as i did this it worked fine.

I did a tcpdump and the ICMP pings are done in this case over port 300 so you are correct all traffic is over that port. These only show up in the firewall logs as dropped ICMP packets and dont say what port...

As far as i know the only filter in the network is for port 25, it doesnt mean there arent any though. But in this case there is no filter.

So all i can suggest at this point is that you check your machines firewall client and make sure its allowing UDP:300.
I think you are right about your firewall log as well, very counter intuitive.

Let us know if you get it working.




meat popsicle

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