lukasz.bromirski.net

Raspberry Pi 4 that comes originally without any case, or can be bought with original case, can bring you headaches. it’s absolutely great and genius computer (never ask me how many I own… ;) ) in version four has a really very fast CPU - Broadcom BCM2711.

…but tools have to be used responsibly. first of all, short disclaimer - I’d like to make it perfectly clear before we go into this long piece, that I’m a: …big fan of discussing merits of technology and technology overall.

I recently had a chance to finish reading fantastic book covering disinformation war happening between USSR and USA during Cold War - Active Measures. it’s frightening how Soviet Russia, and by extension todays Russia, mastered skill of disinformation and…

I was able to finally reach Aleksander Poniewierski SPEED book in my queue of books to read. if you don’t know Aleksander, you should - and this book will give you a lot of good answers for “why?”.

as you may have read recently I was playing with open source routing protocol packages again. from pure CLI familiarity reasons, I kept myself to FRRouting, which is evolution of Quagga, which itself is evolution of Zebra. and Zebra syntax and CLI is based

thanks to good folks at ATMAN, Exatel, NASK and Vectra I was able to add additional AS 112 anycasted resolvers in Poland. this is described in more detail here. however, you may have received an email from us - let’s explain why. why I’m getting emails fr…

ARM announced recently 64-bit Cortex CPU. it’s very interesting, as not only it can run real time operating systems, but 64 bit architecture enables it to address more than 4GB. it also has optional memory protection unit, which means it will be able to r…

after last blog on sharing full bgp feed for IPv4, I got a number of interesting questions. given many of you were asking to have also IPv6 available, I decided to extend the project to cover that as well. disclaimer you’re doing this ON YOUR OWN. i’m not…

thanks to inspiration from Robert Woźny, i’ve just launched two separate AS112 sites in Poland. that would never be possible without great folks at ATMAN: Sebastian Olejnik and Damian Nowacki …and at EPIX: Krzysztof Czuszek and Paweł Staszewski what is AS…

starting from tomorrow, we’re launching another edition of PLNOG conference. as usually, I’d like to invite you to join us.

Daniel Dib asked recently on Twitter about BGP convergence time for world wide operations. two hours he got in response from his friend seemed a bit too long.

i posted quite emotional piece some time ago - on real world warriors that really don’t need to do anything more than they already did. despite that, they want more. publicity, fame and to achieve that - they use lies. it seems even the poster hero of the…

how David defeated Goliath this story started in June of this year. one of Apple AppStore employees made an “error” while reviewing revision of Basecamp authors new app - Hey.

WD was recently caught red-handed on trying to sell HDDs to NAS duties that use SMR technology without informing about it (and, actually, by actively trying to misled customers and then silence the whole situation). that ended up in lawsuit. while others…

one of the interesting and rarely seen configuration options, is ability to have redundant IPv6 tunnel established from source address tracked by HSRP. if you’re limited by other side of communication - in this example Hurricane Electric - to have only one

recently during casual browsing of WLAN controller i spotted that sometimes users are having problems with receiving responses from DHCP server. i was suprised, as family doesn’t complain - and they’d do that immediately. well, so i went troubleshooting e…

i had to do a full recovery recently of my sons MacBook and in doing so, i was greeted with rather mysterious message from Apple: the app store download could not start because it has already been downloaded too many times what?

update this project is still on, but at different IP. please refer to this updated description. old post below recent thread on nanog@ list got me back to old project that i was thinking about long time ago. and here it is - i just launched free-of-charge,

last post in the series about my home lab resulted in a number of interesting emails in my inbox. i have to admit that i really appreciate words of praise. as well as those with constructive, critical feedback :) so after short description what is connect…

i was ranting some time ago about slowness in which IT industry is moving from silicon to light, to speed up not only transport of information (we already do that by means of GBIC/SFP/SFP+ modules), but also processing of traffic. there are already means…

in the good old times, usually you’ve exchanged info about music you listen to over IRC. those were the days or original, vinyl records, then casettes and then CDs… and then it was everything, from MP3s, to FLAC and other formats. right now, i’m loyal to…

i’m trying to be friendly, but being introvert has its dark sides :) the best list of my contacts is at LinkedIn. below you can find the short list of chosen few: Anna Koterwa: long-time friend, from IRC (and GG) and then in person. her site (always ‘in d…

it’s interesting to see proposal submitted by two “freedom stars” of authoritarian China - Huawei and China Telecom to ITU. on the surface the proposal clearly speaks about future societal needs and development of new, improved technologies that - in the…

if you, like me, get bored immediately after you execute copy scp x y, you’ll likely be happy to know that we’re introducing changes in the TCP/IP stack responsible for SCP operations. in NX-OS beginning in 9.3(1), while copying using scp you can add use…

due to COVID-19 outbreak, we’ve been flooded with request to provide assistance with deploying secure connectivity for remote workers. in some organizations number of remote workers grown from 0 to 7000-10000 in week. some others are serving today over 30…

while I already mentioned couple of times on this blog, that handling dynamic routing on firewall is asking yourself for unexpected problems, sometimes it’s needed. as Cisco, we don’t normally recommend using ASA or FTD boxes as full table BGP routers. not

after last 13 years spent at Cisco Systems Poland, working in the “field” I decided it’s prime time for something new. something, that can challenge me and give back that sense of new adventure. having opportunity to spend all that time with great people,…

last couple of weeks were quite hectic.

as it’s easy to notice, I did a site migration. instead of moving to WordPress however (which was original plan), i decided to follow more ambitious path, and deploy Hugo platform, supported by Go… and static page generation (yeah!).

recently thanks to Robert Pająk i’ve had an opportunity to speak at fall edition of Akamai Affinity. as the request was to cover the networking side of innovation, i did my best. actually, that was not so recently - back in november last year, to be exact.

…and in particular, often goes very badly. not only in life in general, but also in the IT world :) you probably have dozens of stories to tell, if not hundreds. someone configured the port badly, everything worked until it stopped … and when it stopped,…

ISR 4000s have the capability to “license” throughput. the solution was built this way with clear goal in mind. previously it was hard to estimate how given router will perform under some random set of features. the CPU driven routers by themselves have a…

i’m great fan of Jason Fried and David Heinemeier Hansson books. latest one - it doesn’t have to be crazy at work - is a great continuation of the previous pieces. all of them: rework, remote and getting real should be part of ‘must read’ for teams and th…

Cixin Liu trilogy was excellent.

great book. short but perfect. i will not try to praise and underline my deep knowledge and uderstanding of - Nosowska works. i know her almost exclusively from ‘texan’, and by the way she writes about people like me in one of the chapters about psychothe…

it took me a few hours to figure out the new subtleties. new computers from Apple with a built-in T2 chip (i.e. new iMac Pro and Macbook Pro 2018 edition) have a dedicated operating system protection. what’s the problem?

i just realised, that there’s a port!

great and unfortunately very short book about british geeks. it consists of couple of short chapters covering specific areas - from satellites (Ariel program), Blue Streak missiles, through Concorde (and all history of trying to keep it in service), to ge…

I bought it, so you won’t have to.

another trilogy worth reading, rightly celebrating popularity as part of the (weak, and painfully crippled) Netflix screening. it consists of Altered Carbon, Broken Angels and Woken Furies. they all cover adventures of a single hero, however because of the

all three books are great, and whole trilogy - delightful. they’re refreshing in style, and for me personally very similar to writings of Stanisława Lema (well, at least there where it’s close to intergalactic travels and technology) and Asimov. everything

for the first time in a few years I took three weeks of vacation.

it was not built for US military. it wasn’t even built to enable survivability of US military infrastructure after nuclear war. there’s a myth in the “internet circles”, that i’m fighting for couple of years already. recently, i was reading great book - D…

140 characters at most, 5 minutes, sandwich you catch up while on the run… and then silence at around 2am and wake up call at 6am… this is how life of most of us looks like. daily.

if you build motto for your company vision, and it’s blunt like, for example, ‘don’t be evil’… people may notice when you decide to remove it.

ARPA, established in 1958, was first and only space agency at that time in United States. to this day it drives fantasies and is unequivocally identified with the emergence of the Internet, but did you know that ARPA (before it became DARPA in 1972) was r…

as you can easily guess, i’m networking geek. my home network was thus built with hacking, not with ‘smallest footprint possible’ in mind. it’s great if you can test your “great” ideas before recommending them to anyone, and of course getting feel of new…

we are herd creatures, naturally social. we have created many tools for remote communication and although the echoes of the electromagnetic wave of our radio transmissions travel fainter and farther into space, today one of the most used tools is the good…

plnog, plnog and… it’s gone. twentieth edition - how the time flies… from the beginning we knew it may be hard, but we can make it. ’let’s target 60 people!’

it should be. it’s kind of tricky to get right and may feel a bit like an abstract concept. random values should be random (unless you’re talking about Debian randomness). so, let’s try that - take a cube in hand and throw it three times. what’s the proba…