WSL２環境のUbuntuでsudo apt-get update実行時にエラーが表示される。

前提・実現したいこと

WSL2にUbuntu 20.04 LTSをインストールしました。
その後、sudo apt-get updateを実行しましたが、エラーがでてしまいました。
いろんなサイトの解決方法を試しましたが、上手くいきませんでした。
試したこと以外の方法で解決策があれば、ご教授をお願い致します。

会社のPCを使用しています。

発生している問題・エラーメッセージ

 sudo apt-get update
Err:1 http://archive.ubuntu.com/ubuntu focal InRelease
  Could not connect to archive.ubuntu.com:80 (2001:67c:1360:8001::23). - connect (111: Connection refused) Could not connect to archive.ubuntu.com:80 (2001:67c:1360:8001::24). - connect (111: Connection refused) Could not connect to archive.ubuntu.com:80 (91.189.88.152). - connect (111: Connection refused) Could not connect to archive.ubuntu.com:80 (91.189.88.142). - connect (111: Connection refused)
Err:2 http://security.ubuntu.com/ubuntu focal-security InRelease
  Could not connect to security.ubuntu.com:80 (2001:67c:1562::15). - connect (111: Connection refused) Could not connect to security.ubuntu.com:80 (2001:67c:1562::18). - connect (111: Connection refused) Could not connect to security.ubuntu.com:80 (91.189.91.38). - connect (111: Connection refused) Could not connect to security.ubuntu.com:80 (91.189.91.39). - connect (111: Connection refused)
Err:3 http://archive.ubuntu.com/ubuntu focal-updates InRelease
  Unable to connect to archive.ubuntu.com:http:
Err:4 http://archive.ubuntu.com/ubuntu focal-backports InRelease
  Unable to connect to archive.ubuntu.com:http:
Reading package lists... Done
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/focal/InRelease  Could not connect to archive.ubuntu.com:80 (2001:67c:1360:8001::23). - connect (111: Connection refused) Could not connect to archive.ubuntu.com:80 (2001:67c:1360:8001::24). - connect (111: Connection refused) Could not connect to archive.ubuntu.com:80 (91.189.88.152). - connect (111: Connection refused) Could not connect to archive.ubuntu.com:80 (91.189.88.142). - connect (111: Connection refused)
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/focal-updates/InRelease  Unable to connect to archive.ubuntu.com:http:
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/focal-backports/InRelease  Unable to connect to archive.ubuntu.com:http:
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/focal-security/InRelease  Could not connect to security.ubuntu.com:80 (2001:67c:1562::15). - connect (111: Connection refused) Could not connect to security.ubuntu.com:80 (2001:67c:1562::18). - connect (111: Connection refused) Could not connect to security.ubuntu.com:80 (91.189.91.38). - connect (111: Connection refused) Could not connect to security.ubuntu.com:80 (91.189.91.39). - connect (111: Connection refused)
W: Some index files failed to download. They have been ignored, or old ones used instead.