Latest Server related questions

Score: 0
Thomas avatar
High cpu temperature and temperature difference
ph flag

On a cluster I am working on there is a node which is showing high CPU temperature.

The node has 2 Intel(R) Xeon(R) CPU E5-2680 v4 @ 2.40GHz.

The sensors command from lm-sensors is showing that one CPU is at around 70°C and the other at 90°C. The load is 100%. It is in fact overloaded but the load can not be reduced. The temperature is highly correlated with the load. The current frequency is high ...

Score: 1
andyknas avatar
Setup DMZ on Ubi USG-3P Router
fi flag

I have a few hosts that sit outside our LAN on a subnet. I'd like to move them behind our USG-3P and use the LAN2 port as a DMZ for these hosts. I don't see any way to do this in the web admin. Even NAT would be fine if I could map multiple hosts (all ports son each), ex: map all ports on public x.x.x.x AND x.x.x.y to hosts on LAN2.

Score: 2
Kruspe avatar
ifup eth0 - /etc/network/if-pre-up.d/iptables exec format error
cn flag

I am currently unable to bring eth0 up again at my Debian 10 vServer after my hosting provider was fixing some issues and restarted my container.

sudo service networking status will output:

ifup[378]: run-parts: failed to exec /etc/network/if-pre-up.d/iptables: Exec format error
ifup[378]: run-parts: /etc/network/if-pre-up.d/iptables exited with return code 1
ifup[378]: ifup: pre-up script failed
Score: 0
Jacek avatar
AWS Organizations - How to globally set boundaries to allow assess only to predefined set of services?
cn flag

I would like to allow users in all accounts in my AWS Organization (under a number of different OUs) to access only a few AWS services: RDS, EC2, S3, etc. In other words, I need to prevent access to anything else. I was thinking about using SCP but denying access to so many services seems to be a bad idea (the FullAWSAccess service control policy is attached by default). I would like to ask if you have  ...

Score: 0
uday kiran avatar
Unable to connect aks cluster using github actions, how to fix that?
uz flag

I am trying to connect to cluster and create a namespace using github actions. For that, I tried these steps.

In the link shared above, I first retrieved the azure service principal for connecting aks.

az ad sp create-for-rbac --name "myApp" --role contributor --scopes /subscriptions/<SUBSCRIPTION_ID>/resourceGroups/<RESOURCE_GROUP> --sdk-auth

And then, proceeded with the steps. But, d ...

Score: 2
st00nks avatar
Docker: Isolate compose stacks on network level, while allowing a single service to be reverse proxied by Traefik
de flag

I'm trying to secure containers on my homelab.

The main goal is:

  • isolating nginxA and nginxB, so they are not able to talk to each other via 172.17.0.1 (eg. preventing nginxA from reaching nginxB via 172.17.0.1:5001)
  • isolating nginxA and nginxB from localhost, making them exclusively accessible via traefik
  • Allowing nginxA to talk to nginxA_DB, which are in the same stack, but without allowing other cont ...
Score: 0
Thomas avatar
Swap settings for GPU cluster
ph flag

I am administering a GPU cluster which is MOSTLY used to do Deep Learning and I have limited sys admin knownledge.

I noticed recently that the swap was set to default (swappiness at 40) and that some jobs are fully using it.

At first I was thinking to deactivate the swap since for me use of the swap is slowing down the jobs and we are far from the memory limits.

But I read on some server fault question ...

Score: 0
Azure Application Gateway Logs Analysis
us flag

I would like to know the difference between timeTaken_d and clientResponseTime_d

please find the query below

AzureDiagnostics | where Category == 'ApplicationGatewayAccessLog' | project timeStamp_t, timeTaken_d, clientResponseTime_d, serverResponseLatency_s, httpStatus_d, requestUri_s, instanceId_s

Score: -1
How do I assign Ubuntu PC a domain
br flag

I want to assign domain name to Ubuntu 20 server. I have assigned ip manually to server. Looking out for free free dns, I found out this link https://freedns.afraid.org/ I am totally confused how to proceed things and what are the per-requisites. Do I have to use apache or nginx on ubuntu 20.04 ?

Score: 0
Check if Azure resource is used
ph flag

Our team has inherited an old project with tons of Azure resources (roughly 1600 in 30+ subscriptions). We were tasked to determined, whether they are still used or can be removed. We were able to identify a vast majority of these services via ARM templates, PowerShell scripts, etc. However, there remains ~250 resources which we are not sure about.

Is there any simple way (Kusto query, API endpoi ...

Score: 0
Redirect URI mismatch error from Google OAuth for flask app
lu flag

I have a Flask web application which is hosting in Google Cloud Run which is hosted with https://mydomain.run.app.

Now I am trying to add google authentication to it. I have created the API under credentials in GCP. I have given https://mydomain.run.app/authorize in the redirect uri but when I tried to login from my app it throws me redirect mismatch error. And the error shows me http://mydomain.run.a ...

Score: 0
jonathan-dev avatar
netcat no reaction to syn packet crafted with gopacket
cn flag

I want to do some experiments with TCP packets. Therefore I am using the gopacket (v1.1.19) to craft packets and send them onto an interface. I have this code for creating a SYN packet and putting it on loopback and sending to 127.0.0.1:8888 where I have a ncat server listening (ncat -v -l 127.0.0.1 8888).

I can see my packet on wireshark as expected but there is no SYN/ACK packet send by the server. Ca ...

Score: 0
Can not install pgAdmin 4 on RHEL 7.7
ky flag

I am trying to install pgAdmin 4 on RHEL 7.7. (PostgreSQL 13 is already successfully installed)

Following the official guide at pgAdmin 4 (RPM)

sudo rpm -e pgadmin4-redhat-repo    
sudo rpm -i https://ftp.postgresql.org/pub/pgadmin/pgadmin4/yum/pgadmin4-redhat-repo-2-1.noarch.rpm

which gives a warning:

warning: /var/tmp/rpm-tmp.dlinTR: Header V3 RSA/SHA256 Signature, key ID 210976f2: NOKEY

After th ...

Score: 1
Mark Johnson avatar
Duplicity local cache during remove-older-than operation
cn flag

Let me preface this by saying that I really know nothing about Duplicity. The person in my organisation that has the knowledge has gone on leave and as usual, while he's away, unusual things happen.

I got an alert today that one of our servers had suddenly filled up the root volume. This server has been running for years and the root volume is (was) only 5GB as it never really had anything in i ...

Score: 0
Connecting an APC RackPDU directly to a Lantronix terminal server
us flag

I have an APC Rack PDU (AP7920) and a Lantronix ETS16P RS232 terminal server. I would like to connect the RackPDU directly to the Lantronix. The RackPDU has a serial RJ12 connector and the Lantronix a serial RJ45 connector. I found pinouts for RackPDU and Lantronix.

This is the connection I came up with:

enter image description here

However, after crimping the cable, the connection did not work (regardless how much I was ty ...

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