hdace

using Sync in China (PRC)

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Hi. I'm an American living in China (PRC). I'm wondering if the Chinese government, which regularly censors and interferes with internet traffic, may be stopping torrent file tracking. Could this be why the SyncApp isn't working here?

Just to be clear, the app works fine on my local area network. When I tried to use it between my home and my work office, that's when it didn't work. I thought that my work office computer would use the secret to connect with the BitTorrent Inc. server and then the torrent tracking system would connect it to my computer at home. Isn't that what's supposed to happen?

Would using a VPN help? If so, I assume both computers would have to have a VPN running, at the same time, and probably to a VPN server in the United States or Europe? The reason I haven't tested this idea is because I have only one VPN account which can only run on one computer at a time. To test this I would have to get a second account, but I thought I'd ask first before I went to the trouble.

Thank you for any advice.

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First of all, can you connect by just simply using a TCP and UDP connection? If not, more than likely a NAT issue (maybe? I'm not too sure what the Chinese government sensors. It's hard to diagnose a problem when the problem is someone actively stopping you).

Although, I have noticed Chinese IPs in my transmission list when I torrent, so, I don't think they do block torrents, or, if they do block torrents, then there's some way to get around it (While still using your real IP & not tunneling through someone else).

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Hi,

As an Danish living in Beijing, China and actively using SyncApp, I can report, that I have no issues what so ever.

I have a NAS here in Beijing, syncing with a NAS in DK with no issues. Having two laptops, also having no problems connecting to both my NAS devices.

My thought is, as Automatic Coding mentiones, that you have some sort of a NAT issue.

Also, I can verify that torrents are working like a charm here in China.

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Hi. I'm an American living in China (PRC). I'm wondering if the Chinese government, which regularly censors and interferes with internet traffic, may be stopping torrent file tracking. Could this be why the SyncApp isn't working here?

Just to be clear, the app works fine on my local area network. When I tried to use it between my home and my work office, that's when it didn't work. I thought that my work office computer would use the secret to connect with the BitTorrent Inc. server and then the torrent tracking system would connect it to my computer at home. Isn't that what's supposed to happen?

Would using a VPN help? If so, I assume both computers would have to have a VPN running, at the same time, and probably to a VPN server in the United States or Europe? The reason I haven't tested this idea is because I have only one VPN account which can only run on one computer at a time. To test this I would have to get a second account, but I thought I'd ask first before I went to the trouble.

Thank you for any advice.

Sync uses upd for internet transfers. So most likely upd is blocked somewhere on your route. As it sees UPD is not blocked by Great FW of China, it must be somewhere inside your network.

You may also try to follow these steps - and we will give you better clue.

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I'm assuming you mean UDP, not UPD? My problem is our routers are in Chinese! However, these acronyms do tend to be written in Roman text and I've searched my router's various pages for UDP settings. It can show UDP data transfers, but there doesn't appear to be any setting for blocking UDP.

I'll try to get the network administrator at work to help me determine if UDP is being blocked somehow.

Thanks for your responses

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I checked both routers and UDP was not being blocked on either one.

Then I tried to run BitTorrent Sync for a third time and this time it worked! It started transferring the files I was expecting it to transfer completely correctly. Today is a holiday in China. Business internet use is low right now. I believe that when China Telecom’s servers are extremely busy some things just don’t happen when they’re supposed to happen. This means that we might not be able to get files to transfer over the internet at the precise moment that we want them to. My boss says he’ll check with them to see if we can increase our bandwidth. But my opinion is that CT’s servers are so busy at peak times that it’s really an infrastructural problem and they will need to upgrade their systems someday. In the meantime, I would have thought that it’s simply a matter of leaving devices turned on overnight. Sooner or later BitTorrent Sync will see the device over the quieter internet and the files will transfer. Of course this is not ideal, but I would have thought that file transfers are not usually instantly required anyway, in our business anyway.

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Hi hdace,

As mentioned, I also live in China.

I can recognize that internet, especially out of China, works more or less as the wind blows.

However, I have not managed to see any pattern for this. I've seen it a sunday morning as well as a wednesday afternoon, that it litteraly sucks.

That being said, I must admit that I can not verify, that btsync is or has been influenzend in the way you mention.

As I mentioned, I've seen no issues with the transfer in or out of China. Actually, I've see the most stable transfer rate once using the BT protocols - better then what I used to see in DK.

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I checked both routers and UDP was not being blocked on either one.

Then I tried to run BitTorrent Sync for a third time and this time it worked! It started transferring the files I was expecting it to transfer completely correctly. Today is a holiday in China. Business internet use is low right now. I believe that when China Telecom’s servers are extremely busy some things just don’t happen when they’re supposed to happen. This means that we might not be able to get files to transfer over the internet at the precise moment that we want them to. My boss says he’ll check with them to see if we can increase our bandwidth. But my opinion is that CT’s servers are so busy at peak times that it’s really an infrastructural problem and they will need to upgrade their systems someday. In the meantime, I would have thought that it’s simply a matter of leaving devices turned on overnight. Sooner or later BitTorrent Sync will see the device over the quieter internet and the files will transfer. Of course this is not ideal, but I would have thought that file transfers are not usually instantly required anyway, in our business anyway.

It is possible for China Telecom to ban the p2p transformation, when the internet use is high.

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it was working and now it is blocked


You mean it was working and now it is blocked?

yes, it was working and now it is blocked in beijing CT and UT


You mean it was working and now it is blocked?

Are you already concerned about this post http://forum.bittorrent.com/topic/24852-btsync-blocked-in-china/  


You mean it was working and now it is blocked?

I personally think China GFW has been blocked tcp and udp 3000...

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[2013-12-20 21:31:56.219] Got 1 tracker ips

[2013-12-20 21:31:56.219] ip 37.61.54.158:3000

[2013-12-20 21:31:56.219] Got 1 tracker ips

[2013-12-20 21:31:56.219] ip 37.61.54.158:3000

[2013-12-20 21:31:56.219] Got 2 relay ips

[2013-12-20 21:31:56.219] ip 67.215.229.106:3000

[2013-12-20 21:31:56.219] ip 67.215.231.242:3000

[2013-12-20 21:31:56.244] Got 1 tracker ips

[2013-12-20 21:31:56.244] ip 37.61.54.158:3000

[2013-12-20 21:31:56.244] Got 1 tracker ips

[2013-12-20 21:31:56.244] ip 37.61.54.158:3000

[2013-12-20 21:31:56.244] Got 1 tracker ips

[2013-12-20 21:31:56.244] ip 37.61.54.158:3000

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