The network speed is very slow

[UAnton]

Hello! I have a problem with a private network. I have 2 uplinks on the server with 10Gb. There are no problems with the network. I created an isolated network and a VM. I configured firewall rules. I logged into the VM. The Internet speed is so low that I can't even update the server (APT update). Where could I have made a mistake? Thanks!

[DaanHoogland]

that is a very generic question @UAnton . first thing to check is if there are any conflicts in routing tables (or asymetric routes) on the host and in the VR.

You use the term server twice in your question. Do these refer to the same machine?

[UAnton]

Speed problems in the VM. I had this problem 6 months ago after a fresh install but don't remember how to resolve it.

oot@VM-01:/home/ubuntu# wget https://cloud-images.ubuntu.com/noble/current/noble-server-cloudimg-amd64.img
--2025-01-22 10:49:03--  https://cloud-images.ubuntu.com/noble/current/noble-server-cloudimg-amd64.img
Resolving cloud-images.ubuntu.com (cloud-images.ubuntu.com)... 185.125.190.37, 185.125.190.40, 2620:2d:4000:1::1a, ...
Connecting to cloud-images.ubuntu.com (cloud-images.ubuntu.com)|185.125.190.37|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 609790976 (582M) [application/octet-stream]
Saving to: ‘noble-server-cloudimg-amd64.img’

noble-server-cloudimg-amd64.img             0%[                                                                                   ]  16.00K  --.-KB/s    eta 8d 5h  

[weizhouapache]

if you use the default network offering for isolated networks, the egress policy is Deny, need to add egress rules to allow outgoing traffic.

[weizhouapache]

can you share the rule you added ?

do you use a nested env ?

[UAnton]

[UAnton]

do you use a nested env ?

No

[weizhouapache]

@UAnton
can you test with an internal server ?

I faced a similar issue which was caused by mtu size. not sure if your issue is related to it.

[UAnton]

Thanks! Change MTU resolve the issue.

[weizhouapache]

great, closing