[SOLVED] Cannot update OS inside container or VM

klik333

Member
Jan 9, 2017
5
0
21
48
Ukraine
I have a server with Proxmox 6. It was set up a couple of months ago. Everything looked fine. But yesterday I noticed that I couldn't update neither containers nor virtual machines with OS Linux. Both command apt update (in debian) and yum update (in centos) return errors like "Could not connect to prod.debian.map.fastly.net:80" or "Failed to connect to 2600:1f16:c1:5e01:4180:6610:5482:c1c0: Network is unreachable".
Why is that? Internet inside CT is available - ping is working. But when I try curl command, it fails saying "curl: (7) Failed to connect to 2604:1380:1001:6c00::1: Network is unreachable". As for me, it's very weird.
Please, if you have any idea why it's happening, give me a hint.
I suspect that my network on the host is setup incorrectly. But I don't know where to dig.
 

klik333

Member
Jan 9, 2017
5
0
21
48
Ukraine
The problem was in misconfigured shorewall on the host. I found incorrect setting by using tcpdump. The problem is solved.
 

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