nushackers / nushackers-site

NUS Hackers website
https://www.nushackers.org
MIT License
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Question regarding download.nus.edu.sg/mirror #566

Open lazka opened 1 year ago

lazka commented 1 year ago

Sorry for the off-topic issue, but I tried the mirror contact email address but no one is responding for the last month.

Since around 2023-03-20 the rsync service is down:

$ rsync --timeout=30 rsync://download.nus.edu.sg
[Receiver] io timeout after 30 seconds -- exiting
rsync error: timeout in data send/receive (code 30) at io.c(200)
[Receiver=3.2.7]

Does anyone know what the problem is, and/or if there can be something done about it?

thanks

@tohlh @shenyih0ng (mentioning recent active contributors here)

zhongfu commented 1 year ago

there's a firewall apparently doing DPI in front of the instance that the mirror runs on, and it seems like it's misconfigured -- any inbound connection on port 873 where the first bytes sent from either end are @RSYNCD: (i.e. the start of the rsyncd greeting) will be dropped silently by the firewall.

unfortunately we don't have any control over the firewall (and we've yet to figure out a good workaround for this issue), but in the meantime, we've contacted those in charge of the network about this to get them to fix it

lazka commented 1 year ago

thanks! 🙏

lazka commented 1 year ago

is there any update on this? :)