Cannot anymore update MacPorts

[manulcaux]

Trying to update MacPorts, I have these errors :

[EmmanuelsMac:~] caux% sudo port selfupdate
Password:
--->  Updating MacPorts base sources using rsync
Error: Error synchronizing MacPorts sources: command execution failed
Please run `port -v selfupdate' for details.
Error: /opt/local/bin/port: port selfupdate failed: Error synchronizing MacPorts sources: command execution failed
[EmmanuelsMac:~] caux% port -v selfupdate
Error: Insufficient privileges to write to MacPorts install prefix.


[EmmanuelsMac:~] caux% sudo port -v selfupdate
--->  Updating MacPorts base sources using rsync
rsync: failed to connect to rsync.macports.org: Connection refused (61)
rsync error: error in socket IO (code 10) at /AppleInternal/BuildRoot/Library/Caches/com.apple.xbs/Sources/rsync/rsync-54.120.1/rsync/clientserver.c(106) [receiver=2.6.9]
Command failed: /usr/bin/rsync -rtzvl --delete-after rsync://rsync.macports.org/macports/release/tarballs/base.tar /opt/local/var/macports/sources/rsync.macports.org/macports/release/tarballs
Exit code: 10
Error: Error synchronizing MacPorts sources: command execution failed
Error: Follow https://guide.macports.org/#project.tickets if you believe there is a bug.
Error: /opt/local/bin/port: port selfupdate failed: Error synchronizing MacPorts sources: command execution failed
[EmmanuelsMac:~] caux% 

I didn't find anything in the existing tickets to solve my problem.

I have a MacBookPro running Catalina 10.15.7

[jmroot (Joshua Root)]

Please see wiki:FAQ#selfupdatefails

[manulcaux]

The problem was due to the network I used, eduroam, which obviously doesn't have the same setting from one location to the other, usually I can update macport on eduroam in my institute, it was not working in a different institute...