rsync: failed to connect to hgdownload.cse.ucsc.edu (128.114.119.163) - server

Question

For reasons I don't understand, rsync does not work for me since today.
I tried to fix the problem by following steps described here : https://askubuntu.com/questions/628102/15-04-rsync-connection-refused
but it did not work...
I am working on a laptop with Ubuntu 16.04 as OS, and have a wired ethernet connection.
I made several queries on the UCSC server yesterday, so maybe their server blocks my connection ?
Example of a query I would like to do :
rsync -a -P rsync://hgdownload.cse.ucsc.edu/goldenPath/hg38/database/cytoBand.txt.gz ./
Here is the Error message :
rsync: failed to connect to hgdownload.cse.ucsc.edu (128.114.119.163): Connection refused (111)
rsync error: error in socket IO (code 10) at clientserver.c(128) [Receiver=3.1.1]
Tell me what you think and if there is any solution to make it work again.
Thank you in advance for your help.
Edit:
UCSC answered me : no problem on their side. The problem definitely come from me. Still looking for a solution.

Answer 1

It looks like the rsync daemon is not running on the remote host, or perhaps it is running on a non-standard port (default is 873).
It's also possible that connections are being blocked by a firewall. Were your earlier successful connections made from the same location, or are you now testing from elsewhere?
As a workaround you can access the files via HTTP using any browser or HTTP command line tools such as curl, wget et. al. Either of these should work:
$ curl http://hgdownload.cse.ucsc.edu/goldenPath/hg38/database/cytoBand.txt.gz -o cytoBand.txt.gz
$ wget http://hgdownload.cse.ucsc.edu/goldenPath/hg38/database/cytoBand.txt.gz

Answer 2

Since rsync is still not working (I tweet to UCSC to ask about it),
I decided to use the tools curl and wget that mhawke advised me, but using the ftp adresses instead of http (slower) :
curl ftp://hgdownload.cse.ucsc.edu/goldenPath/hg38/database/cytoBand.txt.gz -o cytoBand.txt.gz
wget http://hgdownload.cse.ucsc.edu/goldenPath/hg38/database/cytoBand.txt.gz
If anyone has a solution for the rsync problem, or any informations saying that the problem could come from the UCSC server, I would be thankful.
Cheers !
Edit:
I received an answer from UCSC : no problem about rsync on the side of the UCSC server. So the problem definitely comes from me. I tried on 3 different computers on different places, all running under Ubuntu 16.04. I am still looking for a solution.

Answer 3

Thanks to a mail answer from a guy working at UCSC:
I tried the same command line but on the mirror site : ftp://hgdownload-sd.cse.ucsc.edu.
which gave this command line :
rsync -a -P rsync://hgdownload-sd.cse.ucsc.edu/goldenPath/hg38/database/cytoBand.txt.gz ./
I tried it. It worked.
And here comes the best part: in my case I try the command line that did not work... and it works again:
rsync -a -P rsync://hgdownload.cse.ucsc.edu/goldenPath/hg38/database/cytoBand.txt.gz ./
So I did not had any explanations on where does the problem came from. But problem solved!