apt-get update problem

Hi all,
In recent days, when i execute the “apt-get update” command on tx2, it replys following words:

Err:1 http://ports.ubuntu.com/ubuntu-ports xenial InRelease
Could not connect to ports.ubuntu.com:80 (91.189.88.150), connection timed out
Err:2 http://ports.ubuntu.com/ubuntu-ports xenial-updates InRelease
Unable to connect to ports.ubuntu.com:http:
Err:3 http://ports.ubuntu.com/ubuntu-ports xenial-security InRelease
Unable to connect to ports.ubuntu.com:http:
Reading package lists… Done
W: Failed to fetch http://ports.ubuntu.com/ubuntu-ports/dists/xenial/InRelease Could not connect to ports.ubuntu.com:80 (91.189.88.150), connection timed out
W: Failed to fetch http://ports.ubuntu.com/ubuntu-ports/dists/xenial-updates/InRelease Unable to connect to ports.ubuntu.com:http:
W: Failed to fetch http://ports.ubuntu.com/ubuntu-ports/dists/xenial-security/InRelease Unable to connect to ports.ubuntu.com:http:
W: Some index files failed to download. They have been ignored, or old ones used instead.

It seems to that I can not access the web server. Does anybody can fix this? Thanks very much!

I can ping that address (it’s one of Ubuntu’s/Canonical’s servers). I’m guessing that probably you’re running into a firewall or proxy issue (I’m in USA). Is there any network filtering in the way?

Hi 272538551,

Is this still an issue on your side? Any result can be shared?

Thanks