Network | CRnetPACKETS

Tag Archives: Network

The relationship between the Maximum Transmission Unit (MTU) and the Maximum Segment Size (MSS)

Posted on 27. January 2016 by Christian Reusch 4 comments

PDUs of the TCP(IP protocol suite (stack)

A few days ago I have read an answer about the Maximum Segment Size (MSS) at the Wireshark Q&A site.

The answer had shacked me up a little bit, because the author wrote that the MSS is not negotiated. First I had thought that I missed something big in my understanding of the Maximum Segment Size (MSS). But after a dive into the world of the RFCs I realized that I have just misinterpreted /mistranslated the authors statement.

Rate this:

“Fragmentation allowed” spotted by coincidence

Posted on 22. October 2015 by Christian Reusch One comment

A normal day Today I wanted to investigate a phenomen with the Wireshark 2.0rc1 at MacOSX. For that kind of reason I started a local trace on my MacOS. So I did not expect to see any strange traffic due to the point of tracing. But in fact I saw more strange things than I had expected. I saw some

Rate this:

A short story about the IP ID Field

Posted on 29. August 2015 by Christian Reusch 12 comments

The IP ID Field Today I want to tell something about the Identification Field of the IP Header often called the IP ID, it is a longer post than I have mentioned. I have posted a lot of RFC stuff here which you don´t need to read, because I will summarize it in this post. But I wanted to have

Rate this:

Special Types of ARP Packets

Posted on 28. August 2015 by Christian Reusch Leave a comment

Today I have updated my knowledge about the Addresss Resolution Protocol and I figured out some interesting things about Gratious ARP behaviour, which I want to share with you.

Rate this:

Cyberattack at “Deutscher Bundestag” and my personal experience with an cyber attack

Posted on 11. June 2015 by Christian Reusch Leave a comment

Cyber Attack at “Deutscher Bundestag”
While I have been writing my new article about WLAN basics I read an article about the hacker attack at the “Deutscher Bundestag”.
The interesting thing about this attack is, that it seems to be a full hit.
Obviously they are totally compromised, because they lost the last bastion the admin rights of their network. So this is one of the most fatal error you can have. This article inspired me to a personal memory about the history of it security.

Rate this:

CRWinNetDiag

Posted on 3. June 2015 by Christian Reusch Leave a comment

CRWinNetDiag: An Article about the small command line tool CRWinNetDiag which collects the relevant network information and configuration of a windows system without the need of priviliged rights.