Am 25. November 2015 wurde der verbreitete Free Pascal - Compiler (FPC) in der aktualisierten Version 3.0 (Pestering Peacock) veröffentlicht. Die Vielzahl der Neuerungen hat die Entwickler zum ersten großen Versionssprung seit 10 Jahren bewogen. Version 2.0 war 2005 eingeführt worden, die letzte Hauptversion war 2.6 aus dem Jahre 2012. Version ...

When you run the GNU Gatekeeper, you can block spam calls from the well known bots ("MERA RU", "SimpleOPAL" etc.) eg. using a small LUA script in your config.

But that alone doesn't stop the load on the server, because often these bots keep on making calls.

Fail2ban to the rescue!

With this filter definition in /etc/fail2ban/filter.d/gnugk.conf you can check fro rejected calls:

[Definition]
failregex = Dropping call CRV=[0-9]+ from <HOST>:[0-9]+ due to Setup authentication failure
ignoreregex =


And then you can add this jail definition to /etc/fail2ban/jail.local to block the IP:

[gnugk]
enabled  = true
logpath  = /var/log/gnugk.log
filter   = gnugk
bantime  = 6000
maxretry = 2
action   = iptables[name=GnuGk, port=1720, protocol=tcp]


Voila!

This is not only a H.323 topic, but since H.323 also uses TCP connections, it applies to H.323 as well:

To detect network errors and signaling connection problems, you can enable TCP keep alive feature. It will increase signaling bandwidth used, but as bandwidth utilized by signaling channels is low from its nature, the increase should not be significant. Moreover, you can control it using keep alive timeout.

The problem is that most system use keep alive timeout of 7200 seconds, which means the system is notified about a dead connection after 2 hours. You probably want this time to be shorter, like one minute or so. On each operating system, the adjustment is done in a different way.

After settings all parameters, it's recommended to check whether the feature works correctly - just make a test call and unplug a network cable at either side of the call. Then see if the call terminates after the configured timeout.

Linux systems

Use sysctl -A to get a list of available kernel variables
and grep this list for net.ipv4 settings (sysctl -A | grep net.ipv4).
There should exist the following variables:

net.ipv4.tcp_keepalive_time:   time of connection inactivity after which
                               the first keep alive request is sent
net.ipv4.tcp_keepalive_probes: number of keep alive requests retransmitted
                               before the connection is considered broken
net.ipv4.tcp_keepalive_intvl:  time interval between keep alive probes

You can manipulate with these settings using the following command:

sysctl -w net.ipv4.tcp_keepalive_time=60 net.ipv4.tcp_keepalive_probes=3 

    net.ipv4.tcp_keepalive_intvl=10

This sample command changes TCP keepalive timeout to 60 seconds with 3 probes,
10 seconds gap between each. With this, your application will detect dead TCP
connections after 90 seconds (60 + 10 + 10 + 10).

FreeBSD and MacOS X

For the list of available TCP settings (FreeBSD 4.8 an up and 5.4):

sysctl -A | grep net.inet.tcp

net.inet.tcp.keepidle - Amount of time, in milliseconds, that the (TCP) 
connection must be idle before keepalive probes (if enabled) are sent.

net.inet.tcp.keepintvl - The interval, in milliseconds, between 
keepalive probes sent to remote machines. After TCPTV_KEEPCNT (default 
8) probes are sent, with no response, the (TCP)connection is dropped.

net.inet.tcp.always_keepalive - Assume that SO_KEEPALIVE is set on all 
TCP connections, the kernel will periodically send a packet to the 
remote host to verify the connection is still up.

therefore formula to calculate maximum TCP inactive connection time is 
following:

net.inet.tcp.keepidle + (net.inet.tcp.keepintvl x 8)

the result is in milliseconds.

therefore, by setting
net.inet.tcp.keepidle = 10000
net.inet.tcp.keepintvl = 5000
net.inet.tcp.always_keepalive =1 (must be 1 always)

the system will disconnect a call when TCP connection is dead for:
10000 + (5000 x 8) = 50000 msec (50 sec)

To make system remember these settings at startup, you should add them 
to /etc/sysctl.conf file

Solaris

For the list of available TCP settings:

ndd /dev/tcp ?

Keepalive related variables:
- tcp_keepalive_interval - idle timeout

Example:
ndd -set /dev/tcp tcp_keepalive_interval 60000

Windows 2000 and Windows NT

Search Knowledge Base for article ID 120642:
http://support.microsoft.com/kb/120642/EN-US

Basically, you need to tweak some registry entries under
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesTcpipParameters

I had to get an Arduino IDE up and compiling on a Kubuntu 18.04 install. In order to not forget what I did, I made this little post. This is not super detailed but it should get the job done. Grad the 64-bit version of the Arduino IDE (or the 32-bit version if you absolutely […]

Before Installation Installing Kubuntu / Ubuntu on the Alienware 17 R5 Laptop NVME Drive To get the NVME drive or M.2 drive to show up as an installation candidate for the installer, you need to make a small BIOS change and modify two kernel arguments at boot time. First, boot into the BIOS on the […]

I had a Ubuntu 18.10 install setup perfectly on a disk shared with a Windows 10 install. I originally setup Windows 10 and then reduced the size of the Windows 10 partition to make room for a Ubuntu 18.10 install. After the install of Windows 10 and the Ubuntu 18.10 install I had these partitions: […]

THE cheapest two-year fixed-rate mortgages in more than a year were launched last week, heading straight to the top of the 'best-buy' tables. But borrowers should not be dazzled by the headline rates and assess all-round value when picking a...

For borrowers with mortgages between £300,000 and £2 million, John Charcol has launched a market-leading remortgage deal. The 2 year tracker has a free valuation and free legals and is available up to 90% loan-to-value. Ray Boulger, senior technical manager...

Utilizar XHTML puede ayudar a mejorar el posicionamiento Web. Por una parte, se consigue que el código de las páginas Web sea más limpio y claro a los ojos de los robots de búsquedas. Facilitar la labor a este robot siempre es un punto a favor del posicionamiento...

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El registro en los principales buscadores debe ser manual, de forma tal que se puedan cumplir todos los requisitos de la forma más óptima, lo cual con una herramienta automática seria difícil de lograr. Además ya en varios no es posible la inclusión automática pues uno de los pasos del formulario a llenar solicita la escritura de una cadena alfanumérica que se muestra en forma de imagen ruidosa la cual ...

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La accesibilidad ayuda al buen posicionamiento Web. Persigue, entre otros, el objetivo de que ningún usuario este discriminado ante el acceso y asimilación de los contenidos, ya sea por problemas físicos (visión ejemplo), a causa de usar navegadores con pocas capacidades, poseer conexiones muy lentas, personas sin ratón, con pantallas pequeñas o de baja resolución, pantallas en blanco y negro, etc. ... ¿Como lograr esto? ...

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La información de tráfico de Alexa es a menudo un valor llamativo cuando deseamos analizar el éxito de un sitio por la cantidad de visitantes que posee. Sin embargo este es un valor al que se le concede en múltiples ocasiones más importancia de lo que realmente debería representar, o más bien se podría señalar que no siempre es interpretado de forma correcta. ¿Como lograr aparecer en el ranking de Alexa ? ¿Como mejorar el raking en Alexa? ¿ Como interpretar y usar el valor del ranking de Alexa ? Estas son preguntas comunes...

Publicada nueva versión de Developers4Web Seo Toolbar con funcionalidades para obtener el PageRank de los enlaces en una página, actualizaciones a la obtención del AlexaRank y otras mejoras.

Virtual Bush, much like the real G.W. only with you at the controls instead of Dick Cheney.

Both Zillow.com and Trulia.com could vanish tomorrow, completely – websites crash and stay down forever –  and it would make ZERO difference, at all, in the successful sale of any home in Austin TX, or elsewhere in the U.S. Period. There is no hardship or selling disadvantage created for sellers or their listing agents if their real estate listings do not appear on these real estate entertainment and advertising websites because it is not the purpose of these consumer portal sites to sell homes, but instead to sell advertising to Real Estate Agents. These consumer sites not only fail to cause homes to sell, the websites fail to create smarter, better educated buyers and sellers. Instead, they create consumers exposed to bad data, and too much of it. Including the ridiculous Zestimate, which everyone knows is inaccurate but which nonetheless remains the “favorite” feature of Zillow.com users, according to Zillow. ... Read more

About a year ago, Sept 2014, during a violent Austin thunder storm, a rental property I personally own in SW Austin was struck by lightening and caught fire in the attic. As the thunderous flash of light, noise and immediate smoke jolted the tenant out of bed at 2:30AM, he quickly realized that he was standing in water. The home was flooding, and also on fire, simultaneously. Wow! Wake up!! His elderly mother was visiting and he was able to get her and his son out quickly as the house filled with smoke. Then he called 911. Then me. I showed up around 3:15AM, sloshed through about 18 inches of water at my driveway, as about 6 firetrucks were on the scene. It was an apocalyptic scene, like out of a movie. But everyone was ok, and the fire was contained to mostly the attic and three bedrooms. But the ... Read more

I attended the Presentation in Austin this week announcing the Beta rollout of Realtor.com’s new Agent Profiles. Austin is the only city in the US with this live, though it will soon also be turned on in the state of Rhode Island. Though not fully baked, I’ve set up my profile. The “Sold Listing are not yet populating, but should be on the map by mid October. There will also be a Team Profile. Here is what it will look like when viewing a map of Sold Listings in Austin. Pretty cool, right? Are Realtors happy about this? Many are not. The Realtor online forums are ablaze with ignorant complainers, moaning and griping about this, and how it’s “unfair” to populate Realtor profiles or Sold Maps with actual closed sales because it makes the Newbies and part timers look bad. Those of you agents complaining are missing some important data ... Read more

It’s the start of 2016 and already I’ve received a few inquiries from my investor clients wondering whether they should hold on to their rental property, or sell this year. It’s a conversation I have multiple times with multiple clients each year, and it’s a question Sylvia and I sometimes ask ourselves about our own rental property. Especially given the appreciation gains of the past 5 years in Austin. So this article will walk through some of the questions you might ask yourself when contemplating whether to sell your real estate asset, based on how I look at the question with my own rental properties. The first questions to ask yourself are: 1) Do you need the money? and 2) What will you do with the money? I normally don’t make it past those two questions, because the answers for me are are “no” and “I don’t know”. For most, ... Read more

And the real estate journey continues … Sylvia and I started Crossland Real Estate in Jan 1993, and remained independent until we sold our property management portfolio in 2004 and “retired” for a year. We didn’t actually formally retire … more of a sabbatical … as we were still in our 40s with kids 9 and 12. But we did take a year off from active real estate “production”. We weren’t sure whether we wanted to remain in real estate forever or not. I started a telecom services company and dabbled in Business Brokerage, both of which were interesting pursuits worthy of a full effort, and which I could have succeeded at doing, but after some time off from the daily real estate routine, something happened… The phone rang. It was Real Estate. It wanted us back. Sometimes distance from something brings perspective and a renewed appreciation of it. So, ... Read more

Should you enroll in a Real Estate investment seminar in Austin or your home town? Be very careful if you do. Understand the risks and what you are paying.

New York Times columnist Paul Sullivan recently wrote about this DJ posing as a financial advisor. It was one of those setups like you see on TV. They removed his dreadlocks and body piercings, put him in a suit, taught him some basic scripts like “a 401K is the way to go“, and had him meet with actual financial clients to discuss their financial needs and how he can help. When he went for the “close”, all but 1 client said they would work with him. He had zero experience, no qualifications (though I’ll bet his conversational skills helped). But since he looked the part and knew some buzz phrases, and the prospective clients didn’t know the right questions to ask, he was able to win their trust just by being nice and personable. The point of the experiment was to illustrate that the vast majority of financial clients do ... Read more

What effect does "negative cash flow" real estate have on the growth of your Net Worth over time?

What is your Austin home worth, right now? When considering a sale, it’s generally worth “market value”, defined loosely as the highest price a buyer would pay, and that a seller will accept in an open, competitive market. This assumes neither buyer nor seller are under any undue stress or duress external to the transaction itself. Many homeowners want to know their home value even when not considering a sale. Such as when protesting assessed property value at Travis County. Or maybe you are just curious, or you want to update your Net Worth spreadsheet with a current value. If you don’t want the “market” to determine your home value, because you don’t want to sell, there now exists a plethora of “Automated Valuation Model” (AVM) tools that will tell you the supposed value of your home online based on mathematical algorithms and data. The most well know is perhaps ... Read more

The Austin real estate market has begun to level off and slow down a bit, but that fact is not yet fully reflected in the market statistics, other than Days on Market creeping up. Nevertheless, Median Sold price is up to $322K, an increase of 8% over August 2017. I see more price drops coming across the listing update feeds I follow as well, and I also see more “back on market” listings.  This softening of the Austin real estate market may more fully appear in the September through December stats as I expect Days on Market to keep rising and price increases to slow. Real Estate cycles in Texas have traditionally run 4 to 7 years. We’re in year 7 of a continuous increase in prices, which is outpacing the very strong job growth Austin has enjoyed over the same period. But prices have run away from wages. Austin ... Read more

I’ve been protesting property tax values with Travis County for 30 years. Not only for myself, but back in the 1990s, into the 2000s for my property management and real estate clients as well. And also assisting by providing market information to clients and others who ask for help from our Free CMA page, which I think I first put up in 2005. For 2023, TCAD valued a property I owned in Southwest Austin in Legend Oaks neighborhood at $677k. This was excessively high, by more than $100k, but I was unsuccessful at the ARB Hearing (Arbitration Review Board), despite presenting clear objective data. They did lower it to $651k though, still about $100k too high. So for the first time ever, I filed for a Binding Arbitration hearing, paid the $500 deposit, and hired an appraiser to value the property for me as of Jan 1, 2023. TCAD generally ... Read more

The recent lawsuit involving the National Association of Realtors (NAR) and subsequent news coverage have sparked significant discussion within the Realtor community. I’d like to take this opportunity to share my perspective on the home buying and selling process, how Realtors are compensated, and the concept of ‘Uncompensated Effort.’ Realtors earn what is known as a ‘Success Fee.’ Essentially, we provide all our services for free until the transaction is closed and funded, at which point we receive a commission. Efforts that do not result in a closing are what I call ‘Uncompensated Effort.’ Every Realtor incurs this overhead, and it’s an integral part of a system that benefits consumers. Both buyers and sellers appreciate this system because it allows them to access services at no cost, even if they never purchase a home or their property doesn’t sell. For example, a buyer might contact an Austin Realtor based on ... Read more

Peygamber efendimiz (s.a.v.) Müslümanlar zulüme maruz kaldığı zaman, hanefi mezhebine göre sadece sabah namazının farzında, diğer bazı mezheplere göre ise vakit namazlarının farzının son rekatında “rabbenâvelekelhamd” denileceği zaman yani rükudan […]

The post İsrail Filistin Sorunu – Zalime Okunacak Kunut Duaları first appeared on Amerikada Birgün.

Siyonist terör devletinin saldırılarıyla birlikte, birçoğumuz haberimiz olmasına rağmen çok da umursamadığımız bir “Gazze” mevzusuyla karşı karşıya kaldık. Bütün TV kanalları adeta ABD’nin Irak’a yaptığı körfez çıkartmaları gibi haberlerle doldu […]

The post İsrail Filistin’e Neden Şimdi Saldırıyor? first appeared on Amerikada Birgün.

Emailleriniz SPAM’e düşmesin – DKIM – SPF ve DMARC Ayarları başlıklı yazımda gönderdiğiniz epostaların spam’e düşmemesi için yapılabilecek ayarlardan bahsettim. SPF kaydında bir konudan daha bahsedilmesi gerektiğini farkettim. SPF kaydındaki […]

The post SPF Kaydı ve all ibaresi first appeared on Amerikada Birgün.

Türkiye’de hep negatif şeyler oluyor gibi göze çarpıyor ama hayat herşeye ve her türlü probleme rağmen devam ediyor ve güzel şeyler oluyor. Gözüme çarpan ve en çok hoşuma giden iki […]

The post Konferans – Seminer ve Diğer Sosyal Faaliyetleri Takip Edebileceğiniz Siteler first appeared on Amerikada Birgün.

“Kira öder gibi ödüyorsunuz ama kendi evinizin sahibi oluyorsunuz” yalanıyla mortgage kredi sistemini pazarlayan bankacıların, pazarlamacıların ve televizyoncuların kabirde kemikleri sızlayacak. Bu öyle büyük bir yalan ve öyle bir büyük […]

The post Mortgage Kredisi – ALLAH RIZASI için, Çocuklarınız için ALMAYIN first appeared on Amerikada Birgün.

[Dikkat]: Bu yazıda bahsedilen işgal; 1947, 1960, 1980 vesaire yıllarına ait değildir. Bu yazılanlar 2010, 2011, 2012, 2013, 2014, 2015, 2016 ve müdahale edilmediği müddetçe devam edecek bir işgaldir. Tahtakurularının, […]

The post İsrail Filistin Topraklarını Adım Adım Nasıl İşgal ediyor? first appeared on Amerikada Birgün.

Bugün İstanbul Çapa ve Cerrahpaşa hastaneleri etrafında Amerikan Ateli arama günümdü. Doktorumuz alçısız olan bu üründen başkasını kullanmak istemediği için çaresiz kaldık. Alçısız Amerikan ateli diye adı çıkan bu ürün […]

The post Alçısız Amerikan Ateli ve Satış Fiyatı first appeared on Amerikada Birgün.

Oil prices saw a partial recovery on Tuesday following Israel’s military response to Hezbollah’s recent attacks. The geopolitical tensions in the Middle East have once again highlighted the region’s critical role in global energy markets, causing fluctuations in oil prices. The latest conflict began when Hezbollah launched a series of rocket attacks into northern Israel, prompting a swift and decisive retaliation from the Israeli Defense Forces (IDF). The IDF targeted key Hezbollah positions in southern Lebanon, aiming to neutralize the threat and prevent further escalation. This exchange of hostilities has raised concerns about potential disruptions to oil supplies from the region, which is a significant factor in the global energy market. In response to these developments, Brent crude futures rose by 2.5%, settling at $82.30 per barrel, while West Texas Intermediate (WTI) crude futures increased by 2.7%, closing at $78.50 per barrel. Analysts attribute this rebound to fears of supply chain disruptions and the market’s sensitivity to geopolitical instability in the Middle East. Energy market experts have noted that while the immediate impact on oil production and supply routes remains limited, the situation underscores the vulnerability of global oil markets to regional conflicts. The Middle East accounts for a substantial...

In 2024, Libya’s oil industry is navigating a complex landscape marked by both significant challenges and promising opportunities. The Libyan National Oil Corporation (NOC) has set ambitious goals to increase production capacity to two million barrels per day within the next three to five years. Currently, the country produces approximately 1.3 million barrels per day, with plans to boost this by an additional 100,000 barrels per day by the end of the year. Despite these aspirations, Libya’s oil sector continues to grapple with political instability. The country faces ongoing clashes between rival governments, which have historically disrupted oil production and exports. In recent years, these conflicts have led to the shutdown of key oil fields and ports, severely impacting the nation’s oil output and revenues. However, there are signs of recovery and growth. The NOC is preparing to launch its first oil and gas licensing round in nearly two decades, aiming to attract international investment and revitalize exploration activities. This initiative is part of a broader strategy to enhance production and reduce the burning of associated gas by 83% by 2030. Additionally, Libya is making strides in infrastructure development. A notable project is the $600-million oil refinery near the El...

Recently, a significant reserve of oil and gas was discovered in Pakistan’s territorial waters. This finding came after a three-year geographical survey conducted in collaboration with a friendly country. The identification of these reserves could mark an important milestone for Pakistan’s economy. The discovery was confirmed by a detailed study that mapped the exact location of the deposits. The reserves found are considered substantial and have the potential to transform Pakistan’s economy, which currently faces significant financial challenges. The exploitation of these reserves could provide a new source of revenue and reduce the country’s dependence on energy imports. Energy sector experts highlight that, although the discovery is promising, it is still in the early stages of exploration. Considerable investments in infrastructure and technology will be needed to efficiently extract and process the oil and gas. Additionally, the sustainable management of these resources will be crucial to ensure that the economic benefits are long-lasting. The Pakistani government has already been informed about the discovery and is taking steps to initiate exploration activities. The expectation is that, over time, these reserves could significantly contribute to the country’s economic growth, creating jobs and boosting industrial development.

According to the latest GlobalData report, the oil and gas industry is experiencing a slowdown in its energy transition efforts. The report highlights that despite the growing global emphasis on sustainability and reducing carbon emissions, the pace at which the oil and gas sector is adopting renewable energy and other green technologies has decelerated. This slowdown is attributed to several factors, including economic uncertainties and fluctuating oil prices. Investment Shifts and Challenges The report points out that while there has been a significant investment in renewable energy projects, the overall commitment from major oil and gas companies has not met the expected levels. Companies are facing challenges in balancing their traditional fossil fuel operations with the need to invest in cleaner energy sources. The economic pressures and the need to maintain profitability in a volatile market have led to a cautious approach towards large-scale investments in renewable energy. Ravindra Puranik, Oil and Gas Analyst at GlobalData, commented on the impact of the Russia-Ukraine war on energy security. He noted that the resultant supply chain disruptions have driven countries towards readily available fossil fuels, thereby boosting oil and gas demand. Puranik also highlighted that the push for energy self-reliance and high...

A surprisingly able and well performing mini cruiser/commuter

The most useful tools that every programmer should know and use. These tools are essential to every coding working and also increase productivity.

The post The Essential Tools for Programmers appeared first on Digital Inspiration.

Learn how to sell digital products like PDF ebooks, photos, music, videos and other digitally downloadable files through Google Drive and PayPal. Customers can buy your product through 1-step checkout and the files are delivered to them by email.

The post How to Sell Digital Products Online with Google Drive and PayPal appeared first on Digital Inspiration.

Schedule and send Google Spreadsheets on a recurring schedule. Email Google Sheets as PDF, CSV or Microsoft Excel formats on daily, weekly, monthly or yearly schedules.

The post How to Email Spreadsheets Automatically on a Recurring Schedule appeared first on Digital Inspiration.

Are you bilinqual? Are you interested in helping me localize my widgets by translating some text? Email me! Your reward will be a mention and link on my widgets web page.

I am excited to announce easily my most sophisticated widget ever, Sundial. In the past I have sort of hacked my widgets together. This project was for work, so I was really thorough and did things according to the Apple guidelines (imagine that!). What is Sundial, you ask? Sundial makes it easy to track time on projects through Basecamp. Check it out!