Developers Club geek daily blog

Iproute2 policy-routing and balancing of traffic between aplinka — problem of reset of connections

2 years, 1 month ago
Has come across unpleasant reef. We have system with several aplinka, and policy-routing implementing balancing of connections between aplinka with the help:

ip route replace default scope global nexthop via 11.22.33.1 dev eth0 weight 1 nexthop via 55.66.77.1 dev eth1 weight 1

(Approximate instruction here)

The problem consists in the following — connections periodically fall, and no system is present. Can stay some hours, can fall in 5-10 minutes. It does not disturb any http and torrent'am. In the first case of session usually rather short, takes place in the second rekonnekt imperceptibly and without effects. But if we work with ssh?

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Microsoft will let out own distribution kit of Linux

2 years, 2 months ago
image

Yes. You have not misheard: the Microsoft corporation really is going to let out own distribution kit of the open Linux operating system. It will be named Azure Cloud Switch (ACS), and in brief it can be described, how cross-platform building block operating system for management of data-centers.

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The SCST Target setup on CentOS 7 with use of FC QLogic of the adapter

2 years, 2 months ago

Background


In my infrastructure among the other three ESXi of 5.5 servers connected to SAN HP MSA1000 (to piece of iron around 10 years) on optics through switch of HP StorageWorks 2/8q, work with use of QLogic QLA200 adapters. Certainly, storage very productive, but also and very modest on volume. As virtualization now — trend, there was irresistible desire to receive really big storage which is also connected on optics with block access. I will not explain why block – holivara on this subject have begun on Noah's Ark, and it does not belong to subject of this article. Well and as it always happens, the budget even close does not allow to buy certain branded solution therefore it is necessary only to become the hero of the Mad Handles program.

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Corporate VPN with ACCEL-PPP+IPsec and authorization in Freeradius through AD

2 years, 2 months ago

In this note I want to set example of quick implementation of the corporate VPN server with support of PPTP, L2TP (both with IPsec and without), IPSec vpn with uniform base which will be able to work with address pools, different user groups, to authorize users both from LDAP, and from local base, optional setup of sheypirovaniye both for groups, and for certain users with support of windows, linux, osx, ios, android of clients and all this on open solutions.
P.S. In this note aspects of network safety will not be affected, differently it will expand in the huge document, with heap of nuances in implementation, it is possible I will separately tell about defense of perimeter and network safety next time.
To whom it is interesting, welcome under kat.

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We do the network printer of HP LJ1000

2 years, 2 months ago
HP LaserJet 1000 — excellent working horse, the fast and fault-free printer with the USB interface with the low cost of print. In article I will describe difficulties and subtleties of setup software printers of HP for work through router on network on the example of the LJ1000. Velkam under kat!

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Access restriction to web applications in Synology DSM

2 years, 2 months ago
Synology storage systems — the piece which is rather extended now. They convenient, silent, compact, with heap of opportunities. However own cloud — it is good, but it is necessary to reflect on safety seriously. Further we will consider how flexibly to limit access to the user web applications of Synology. Let's use authorization of x509 certificates, name and the password and restriction to IP addresses.

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Vim-like management by means of xmodmap

2 years, 2 months ago
The implementation of Vim-like of management described in the previous article has couple of essential shortcomings: approaches only GTK environment and cursor movement on the edited elements requires key the modifier. It turns out, in general, not absolutely and Vim-like as it has been truly noticed in comments. Therefore, the decision to describe the experience of creation of the vimoobrazny keyboard environment with use of xmodmap and command cover has been made.

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The Vim-like setup of management in GTK

2 years, 2 months ago
I use text editor of Vim practically for all tasks connected with interactive text editing: for configuration files and the source code, as the environment of imposition of LaTeX, for writing of letters together with mutt and even as the external editor in the web browser.

Well got accustomed hot keys of cursor control [hjkl] have started moving out of the editor's limits, for example, to command cover (together with the modifier).

However, it would be desirable to have usual hot keys in graphic applications. Actually, further it will be a question of setup of GTK environment.

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The CDMA setup of the ZTE AD3700 modem for Intertelecom in Linux

2 years, 2 months ago
Let's consider setup here of such here modem. According to the passport he is called ZTE AD3700.



The Intertelecom provider has bought probably the whole KamAZ of such written-off modems in due time. Similar CDMA modems are used also by other providers, for example PeopleNet. Yes actually for many devices on the basis of chipset of Qualcomm gobi it is the manual has to work.

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We configure the keyboard shortcuts in Linux like Mac OS X

2 years, 2 months ago

Earlier, I quite often had such situation when at the same time you work in the terminal and, for example, in the browser.
After several business hours you start being confused and in the terminal instead of [Ctrl] + [Shift] + [C] you click [Ctrl] + [C], and in the browser on the contrary. As a result in the terminal you receive interruption and in the browser instead of the expected effect at you the debagger slowly progruzhatsya.
Once it has got me and I have decided that it is time to change something...

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