Worth Exploring: OMNI and AERO
Do you ever feel like we don’t have enough overlay networking technologies? Don’t worry, there’s always another one, for example Overlay Multilink Network Interface (OMNI) with Asymmetric Extended Route Optimization (AERO) services. Want to know more? Fred Templin described it in a series of overview articles on APNIC blog.
Worth Exploring: OMNI and AERO
Do you ever feel like we don’t have enough overlay networking technologies? Don’t worry, there’s always another one, for example Overlay Multilink Network Interface (OMNI) with Asymmetric Extended Route Optimization (AERO) services. Want to know more? Fred Templin described it in a series of overview articles on APNIC blog.
Buffer overflow — Linux Process — Stack Creation and Inspection
< MEDIUM: https://raaki-88.medium.com/buffer-overflow-linux-process-stack-creation-and-i-d6f28b0239dc >
Process and what happens during process creation have been discussed in this post previously — https://medium.com/@raaki-88/linux-process-what-happens-under-the-hood-49e8bcf6173c
Now, let’s understand what is buffer overflow:
A buffer overflow is a type of software vulnerability that occurs when a program tries to store more data in a buffer (a temporary storage area) than it can hold. This can cause the program to overwrite adjacent memory locations, potentially leading to the execution of malicious code or the crashing of the program. Buffer overflow attacks are a common method used by hackers to gain unauthorized access to a system.
Generally, C and C++ languages are more vulnerable to Buffer Overflow while programming languages like Python and Go have implementations which protect stack.
I have written the program in Python but had to use underlying C functionality to achieve similarly.
#!/usr/bin/python3
import ctypes
import pdb
buffer = ctypes.create_string_buffer(8)
ctypes.memmove(buffer, b"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA",1000)
print('end of the program')
This is a very simple implementation where we created a buffer which can hold 8 bytes of memory, next we will create a new object which moves from one block of the memory to another but with a newer size, which will Continue reading
Friday Networking Field Day Thoughts
I’m wrapping up Networking Field Day 30 this week and as is always the case there was a lot of great discussion from both the presenters and the delegates outside of the presentations. It’s one of the reasons why I love doing this job even after almost ten years. I get to meet fun people and have an impact on so many things in the tech industry.
- Network-as-a-Service is coming. We recorded a roundtable discussion about it and I think the impact that it’s going to have on mid-sized businesses is massive. It’s going to be like cloud. Not just in operational capability. It’s also going to be a huge driver for what you can do with your network in support of applications. The snowflakes may melt under the weight of the cookies we make from the cookie cutter deployments.
- It feels like a lot of companies are trying to find what’s next. Part of that is coming from the ways that organizations are changing their outlook for what an office should be after the pandemic shutdowns. But still others are realizing they can’t use the same revenue stream for the next five years and hope to survive. This isn’t Continue reading
Heavy Networking 662: Home Lab In The Cloud Or Your Basement?
On today's Heavy Networking, guest Tom Costello walks us through his personal lab in the cloud. We discuss pros and cons of the cloud vs. a basement, using EVE-NG vs. CML, how automation can help you manage cloud costs, resources for those who might want a cloud lab, and more.
The post Heavy Networking 662: Home Lab In The Cloud Or Your Basement? appeared first on Packet Pushers.
Heavy Networking 662: Home Lab In The Cloud Or Your Basement?
On today's Heavy Networking, guest Tom Costello walks us through his personal lab in the cloud. We discuss pros and cons of the cloud vs. a basement, using EVE-NG vs. CML, how automation can help you manage cloud costs, resources for those who might want a cloud lab, and more.Digital Twins are a Living and Breathing Network Diagram
Visibility into network intent is a growing problem for NetOps teams. Learn how digital twins create a living and breathing network diagram with network change preparation, troubleshooting, and compliance benefits that result in more confidence and increased implementation speed.Internet disruptions overview for Q4 2022
Cloudflare operates in more than 250 cities in over 100 countries, where we interconnect with over 10,000 network providers in order to provide a broad range of services to millions of customers. The breadth of both our network and our customer base provides us with a unique perspective on Internet resilience, enabling us to observe the impact of Internet disruptions.
While Internet disruptions are never convenient, online interest in the 2022 World Cup in mid-November and the growth in online holiday shopping in many areas during November and December meant that connectivity issues could be particularly disruptive. Having said that, the fourth quarter appeared to be a bit quieter from an Internet disruptions perspective, although Iran and Ukraine continued to be hotspots, as we discuss below.
Government directed
Multi-hour Internet shutdowns are frequently used by authoritarian governments in response to widespread protests as a means of limiting communications among protestors, as well preventing protestors from sharing information and video with the outside world. During the fourth quarter Cuba and Sudan again implemented such shutdowns, while Iran continued the series of “Internet curfews” across mobile networks it started in mid-September, in addition to implementing several other regional Internet shutdowns.
Cuba
Video: 2023 Network Engineer Path to Success
David Bombal kindly invited me to have another chat talking about the future of networking in late 2022. The resulting (masterfully edited) video is already on YouTube. Hope you’ll enjoy it as much as I enjoyed chatting with David.
Video: 2023 Network Engineer Path to Success
David Bombal kindly invited me to have another chat talking about the future of networking in late 2022. The resulting (masterfully edited) video is already on YouTube. Hope you’ll enjoy it as much as I enjoyed chatting with David.
Hedge 162: Geoff Huston and Going Dark
Encrypt everything! Now! We don’t often do well with absolutes like this in the engineering world–we tend to focus on “get it down,” and not to think very much about the side effects or unintended consequences. What are the unintended consequences of encrypting all traffic all the time? Geoff Huston joins Tom Ammon and Russ White to discuss the problems with going dark.