我正在 PowerEdge R230 上设置新的 Ubuntu 20.4.6 LTS 安装。
一切顺利，除了当我尝试运行时sudo apt update出现此错误：
Cannot initiate the connection to it.archive.ubuntu.com:80 (2001:760:ffff:b6:4:100:0:70). - connect (101: Network is unreachable) Cannot initiate the connection to it.archive.ubuntu.com:80 (2001:760:ffff:b6:4:100:0:72). - connect (101: Network is unreachable) Cannot initiate the connection to it.archive.ubuntu.com:80 (2001:760:ffff:b6:4:100:0:73). - connect (101: Network is unreachable) Could not connect to it.archive.ubuntu.com:80 (90.147.160.73), connection timed out Could not connect to it.archive.ubuntu.com:80 (90.147.160.70), connection timed out Could not connect to it.archive.ubuntu.com:80 (90.147.160.72), connection timed out
Err:2 http://it.archive.ubuntu.com/ubuntu focal-updates InRelease
Cannot initiate the connection to it.archive.ubuntu.com:80 (2001:760:ffff:b6:4:100:0:70). - connect (101: Network is unreachable) Cannot initiate the connection to it.archive.ubuntu.com:80 (2001:760:ffff:b6:4:100:0:72). - connect (101: Network is unreachable) Cannot initiate the connection to it.archive.ubuntu.com:80 (2001:760:ffff:b6:4:100:0:73). - connect (101: Network is unreachable)
Err:3 http://it.archive.ubuntu.com/ubuntu focal-backports InRelease
Cannot initiate the connection to it.archive.ubuntu.com:80 (2001:760:ffff:b6:4:100:0:70). - connect (101: Network is unreachable) Cannot initiate the connection to it.archive.ubuntu.com:80 (2001:760:ffff:b6:4:100:0:72). - connect (101: Network is unreachable) Cannot initiate the connection to it.archive.ubuntu.com:80 (2001:760:ffff:b6:4:100:0:73). - connect (101: Network is unreachable)
Err:4 http://it.archive.ubuntu.com/ubuntu focal-security InRelease
Cannot initiate the connection to it.archive.ubuntu.com:80 (2001:760:ffff:b6:4:100:0:70). - connect (101: Network is unreachable) Cannot initiate the connection to it.archive.ubuntu.com:80 (2001:760:ffff:b6:4:100:0:72). - connect (101: Network is unreachable) Cannot initiate the connection to it.archive.ubuntu.com:80 (2001:760:ffff:b6:4:100:0:73). - connect (101: Network is unreachable)
Reading package lists... Done
Building dependency tree
Reading state information... Done
All packages are up to date.
W: Failed to fetch http://it.archive.ubuntu.com/ubuntu/dists/focal/InRelease Cannot initiate the connection to it.archive.ubuntu.com:80 (2001:760:ffff:b6:4:100:0:70). - connect (101: Network is unreachable) Cannot initiate the connection to it.archive.ubuntu.com:80 (2001:760:ffff:b6:4:100:0:72). - connect (101: Network is unreachable) Cannot initiate the connection to it.archive.ubuntu.com:80 (2001:760:ffff:b6:4:100:0:73). - connect (101: Network is unreachable) Could not connect to it.archive.ubuntu.com:80 (90.147.160.73), connection timed out Could not connect to it.archive.ubuntu.com:80 (90.147.160.70), connection timed out Could not connect to it.archive.ubuntu.com:80 (90.147.160.72), connection timed out
W: Failed to fetch http://it.archive.ubuntu.com/ubuntu/dists/focal-updates/InRelease Cannot initiate the connection to it.archive.ubuntu.com:80 (2001:760:ffff:b6:4:100:0:70). - connect (101: Network is unreachable) Cannot initiate the connection to it.archive.ubuntu.com:80 (2001:760:ffff:b6:4:100:0:72). - connect (101: Network is unreachable) Cannot initiate the connection to it.archive.ubuntu.com:80 (2001:760:ffff:b6:4:100:0:73). - connect (101: Network is unreachable)
W: Failed to fetch http://it.archive.ubuntu.com/ubuntu/dists/focal-backports/InRelease Cannot initiate the connection to it.archive.ubuntu.com:80 (2001:760:ffff:b6:4:100:0:70). - connect (101: Network is unreachable) Cannot initiate the connection to it.archive.ubuntu.com:80 (2001:760:ffff:b6:4:100:0:72). - connect (101: Network is unreachable) Cannot initiate the connection to it.archive.ubuntu.com:80 (2001:760:ffff:b6:4:100:0:73). - connect (101: Network is unreachable)
W: Failed to fetch http://it.archive.ubuntu.com/ubuntu/dists/focal-security/InRelease Cannot initiate the connection to it.archive.ubuntu.com:80 (2001:760:ffff:b6:4:100:0:70). - connect (101: Network is unreachable) Cannot initiate the connection to it.archive.ubuntu.com:80 (2001:760:ffff:b6:4:100:0:72). - connect (101: Network is unreachable) Cannot initiate the connection to it.archive.ubuntu.com:80 (2001:760:ffff:b6:4:100:0:73). - connect (101: Network is unreachable)
W: Some index files failed to download. They have been ignored, or old ones used instead.
这台机器的 LAN 位于防火墙之下，但问题似乎只出现在这台机器上。我将跟踪tracepath -p 80 it.archive.ubuntu.com这台机器以及同一 LAN 内另一台能够访问镜像的机器的日志。
有问题的机器
1?: [LOCALHOST] pmtu 1500
1: host-2-112-136-161.business.telecomitalia.it 1.539ms
1: host-2-112-136-161.business.telecomitalia.it 2.316ms
2: host-85-38-42-190.business.telecomitalia.it 2.004ms
3: no reply
4: no reply
5: no reply
6: no reply
7: no reply
8: garr.rom.namex.it 17.790ms
9: re1-rm02-rs1-bo01.bo01.garr.net 25.796ms
10: no reply
11: no reply
12: no reply
13: no reply
14: no reply
15: no reply
16: no reply
17: no reply
18: no reply
19: no reply
20: no reply
21: no reply
22: no reply
23: no reply
24: no reply
25: no reply
26: no reply
27: no reply
28: no reply
29: no reply
30: no reply
Too many hops: pmtu 1500
Resume: pmtu 1500
另一台机器
C:\Users\Administrator>tracert it.archive.ubuntu.com
Traccia instradamento verso proxy.mirror.garr.it [90.147.160.72]
su un massimo di 30 punti di passaggio:
1 1 ms <1 ms <1 ms host-2-112-136-161.business.telecomitalia.it [2.
112.136.161]
2 2 ms 1 ms 2 ms host-85-38-42-190.business.telecomitalia.it [85.
38.42.190]
3 * * * Richiesta scaduta.
4 * * * Richiesta scaduta.
5 * * * Richiesta scaduta.
6 * * * Richiesta scaduta.
7 * * * Richiesta scaduta.
8 13 ms 13 ms 12 ms garr.rom.namex.it [193.201.28.15]
9 12 ms 12 ms 13 ms re1-rm02-rs1-rm02.rm02.garr.net [185.191.181.70]
10 27 ms 28 ms 26 ms ru-dc1-bari-rl1-ba01.ba01.garr.net [193.204.219.
8]
11 27 ms 26 ms 26 ms 90.147.203.33
12 24 ms 25 ms 24 ms 90.147.160.129
13 23 ms 23 ms 23 ms 90.147.160.72
Traccia completata.
这是我的第一个问题，所以我希望我这样表达是可以的。