Telco and IT – Jarek Hartman

33 posts in Telco and IT.

New hardware My lab before 2024 refreshment consisted of three nodes: AMD Ryzen 9 3900XT 12-Core @ 3.8GHz, 128 GB RAM i7-7700 4-Core @ …

Pi-diet as a quorum device for Proxmox

There is a lot of good descriptions how to set it up, however – as Pi-diet does not use classic sshd but `dropbear` `pvecm qdevice setup` …

Proxmox monitoring

A toolset to gather temperature and power consumption metrics then collect in Prometheus. Can be found on GitHub …

Proxmox Cloud-Init

Custom Cloud-Init configuration As stated in Proxmox Doc, you can create a custom Cloud-Init config where you’re free to set all parameters …

Convert Diameter msg hex string to Wireshark pcap

A “raw” hex string can be converted into Wireshark pcap: query="<hex string here>" export …

Live Wireshark diameter capturing from K8s container (in Google Kubernetes Engine)

Handy command to remotely capture tcpdump from a K8s container located in Google Kubernetes Engine and then display it (live!) in Wireshark …

How to fix Permission “artifactregistry.repositories.downloadArtifacts” denied on resource on Ubuntu when pulling from Google Artifact repository

Easiest way to install Docker in Ubuntu is to use snap. But then when you try to pull/push any images from Google Cloud Platform (GCP) …

Wireshark MATE for Diameter Charging-Control

That’s surprising that for all these years I didn’t know about Wireshark MATE: MATE: Meta Analysis and Tracing Engine What is MATE? Well, to …

How to enable R environment in Golden Cheetah on Mac?

Somehow I couldn’t find a complete guide how to install R and configure it properly in Golden Cheetah (I’m using v3.5). There is a good …

Wireshark LUA plugin

This is an example of a LUA plugin for Wireshark which goes through the packets and generates a statistic. In my case, I was looking for …

OUI issue NGINST-64002: Error occurred in validation of: “Host Name”

When installing an Oracle application using OUI (Oracle Universal Installer) sometimes it verifies if a given host is reachable. …

Prometheus Node Exporter /lib/init/init-d-script: /usr/bin/daemon: not found

After Ubuntu upgrade 18.04 -> 18.10, Prometheus Node Exporter started to complain: root@grafana:~# /etc/init.d/prometheus-node-exporter …

Oracle Coherence – description of federation member states

States of Oracle Coherence federation are not very well described in the documentation. So I thought it would be good to ask at the source. …

Proxmox: enp0s31f6: Detected Hardware Unit Hang

Since a few weeks, my Proxmox lab has started having issues with on-board network. The adapter enters in “hang” state, the logs are full of …

Prevent Mac hidden files being written to a shared storage

MacOS tends to trash mounted disks with number of useless hidden files (e.g. ._* or .DS_Store ). There were number of recipes in the …

Oracle 12c 32-bit client and direct GOT relocation R_386_GOT32 against `lxecerr’

Edit 12/09/2018 As Ivan commented below: with binutils release 27.28 it seems to be solved. But see the workaround below in case it’s not… …

Site migrated to a new server

Due to issues with my current hosting, I decided to move the site to a new server. This might be a temporary location but will decide after …

Hosting and home page

Belkin KVM: Falied to validate certificate

After one of JVM updates, my Belkin KVM (Remote IP Manager) has started refusing to start with “Falied to validate certificate” error …

How to connect a SCTP single-homed node with SCTP multi-homed one?

Typical and most robust way of configuring connectivity over SCTP (e.g. Diameter or Camel links) is to use two independent IP links (VLANs), …

NoSQL: Exiting inner Replica loop with exception com.sleepycat.je.rep.RollbackProhibitedException

$ cd /opt/ece/data/nosql/storage2/kvroot/ECEStore/log $ (for i in $(ls rg*-rn*_0.log); do tail -200 $i | grep "Originally thrown by HA …

ASN.1 encoding tutorial

Introduction Recently I in my work I had to encode an Inap (to be more precise – Sinap) content “by hand”. It’s not a rocket science however …

My fight with OpenSS7

Introduction One day I decided it would be fun to play with a real SS7 stack. The only one I could find was OpenSS7.

USB‑Serial adapter on Mac OS X

Even though the serial port is considered a “dead” interface, people still need it from time to time. On a Mac it’s possible — just not …

Q.850 Release Cause tool

I love Wireshark, but sometimes it doesn’t decode all the parameters I need. One example: Q.850 cause codes inside INAP/CAMEL Release Call …

Disable and remove the usbecm2 device on Solaris 11

After a fresh Solaris 11 install on a T4‑1 server, I noticed an unexpected network interface: usbecm2. root@slc:/# ifconfig -a lo0: …

PHP Startup: unable to load /usr/lib/php5/20100525/snmp.so

If you see this error on Ubuntu: PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib/php5/20100525/snmp.so' - …

Wireshark 1.6.1 fails to start on Solaris 10

On a fresh Solaris 10 install, Wireshark (from sunfreeware.com) just wouldn’t start: root@am1slc01 # wireshark No fonts found; this probably …

Are you a coffee fan? Are you an engineer? Then you’ll appreciate this kind of coffee machine: Not sure about you, but I was impressed 🙂

Application Context Name (ACN)

The application context (AC) is the mechanism for identifying the protocol and the protocol version of an application part (AP). The object …

Alcatel PBX services

Another student project — this time a description of Alcatel PBX services (Update 2023: the page seems to be offline). Originally hosted on …

Web-to-UUS gateway

During my time at TP S.A. I worked in the Network Division, in a team focused on ISDN services. One of the projects I helped build was a …

Ezenia videoconferencing system

Near the end of my studies I ran into videoconferencing systems. It inspired my thesis topic — IP telephony — and I dug into the H.323 and …

PointCode Converter

Check interactive WWW Point Code Converter Quick summary This is a small calculator for converting SS7 point codes between different …

SS7 Point Codes