SD-WAN nedir ?

Yazılım tabanlı geniş alan ağı (SD-WAN), lokasyonlar ve merkezleri birbirine bağlayan alt yapılardır. SD-WAN günümüz teknolojilerin de T-1 ya da MPLS standartlarına alternatif olarak gösterilmektedir. Bu alt yapılara alternatif olarak vendor bağımlı SD-WAN cihazları üzerinde aynı anda xDSL, MPLS, Mobil GSM ve fiber aynı anda kullanılabilir. Tabi vendor bağımlı bu hat kullanım kapsamı değişiklik gösterebilir.

SD-WAN teknolojisi ile birlikte uç nokta da bulunan trafik güvenli şekilde kullanılan Tunnel teknolojisine göre bu IPSec yada GRE olabilir, trafik encrypt edilmiş şekil de merkeze iletilir. Bu iletilen trafik merkez de bir ana cihaz tarafından karşılanarak çeşitli kurallar ve yapılan tanımlar doğrultusun da erişimler kontrol altına alınabilir.

Aynı zaman da uç nokta da konumlandırılmış olan cihazlar üzerin de active / active , active / passive devreler sonlandırılabilir. Bu devreler üzerinde load-balancing ve ya fail-over tanımları yapılabilir. Bu özelliklerin hepsi vendor ve model bağımlı değişebilir.

SD-WAN alt yapısı gereği MPLS, Metro ethernet alt yapılarına göre daha uygun maliyetler sağlamaktadır.

SD-WAN üzerin hedef bazlı routing tanımları yapılabilir. Yani ilgili hedefler özelin de istenilen link üzerinden trafik iletilsin diyebiliriz.

SD-WAN alt yapıları genel olarak Zero Touch Provisioning destekler. Yani size gelen cihaz aslın da sizin müşteri cloud ortamınıza tanımlanır. Cihaz enerji ve internet erişimi aldığı an merkez ile iletişime gerek konfigürasyonunu otomatik olarak üzerine çekebilir. Bu da kurulum kolaylığı sağlamaktadır.

Son olarak SD-WAN yapıların da tüm alt yapı ve sistemler monitoring sistemleri üzerinden izlenebilir, detaylı raporlar oluşturulabilir.

SD-WAN’ı alttaki 4 ana başlıkta toplayabiliriz.

Örnek SD-WAN topolojisi;

SD-WAN Vendor Listesi;

  • Fortinet
  • Sophos
  • Peplink
  • Silver Peak
  • Cisco Systems
  • HPe Aruba

Teşekkürler.

How to view Disk properties with PowerShell

How to Install Redis on Ubuntu 18.04 & 16.04 LTS

Step – 1

Step – 2

Step – 3

Step – 4

Step – 5 (Configure Redis)

Update the following values in Redis configuration file according to your requirement. You can increase max memory limit as per available on your server.

Step – 6

Redis Service Control

sudo systemctl status redis-server.service or sudo service redis-server status

Redis Check & Control

How to remove systemd services

Citrix NetScaler nsFeatureInfo SNMP OID Reference

nsFeatureInfo (1.3.6.1.4.1.5951.4.1.1.20)
featureWebLogging (1.3.6.1.4.1.5951.4.1.1.20.1)
This represents whether webLogging feature is enabled or disabled on NetScaler.

featureSurgeProtection (1.3.6.1.4.1.5951.4.1.1.20.2)
This represents whether surgeProtection feature is enabled or disabled on NetScaler.

featureLoadBalancing (1.3.6.1.4.1.5951.4.1.1.20.3)
This represents whether LoadBalancing feature is enabled or disabled on NetScaler.

featureContentSwitching (1.3.6.1.4.1.5951.4.1.1.20.4)
This represents whether contentSwitching feature is enabled or disabled on NetScaler.

featureCacheRedirection (1.3.6.1.4.1.5951.4.1.1.20.5)
This represents whether cacheRedirection feature is enabled or disabled on NetScaler.

featureSureConnect (1.3.6.1.4.1.5951.4.1.1.20.6)
This represents whether sureConnect feature is enabled or disabled on NetScaler.

featureCompression (1.3.6.1.4.1.5951.4.1.1.20.7)
This represents whether compression feature is enabled or disabled on NetScaler.

featurePriorityQueuing (1.3.6.1.4.1.5951.4.1.1.20.8)
This represents whether priorityQueuing feature is enabled or disabled on NetScaler.

featureSslOffloading (1.3.6.1.4.1.5951.4.1.1.20.9)
This represents whether sslOffloading feature is enabled or disabled on NetScaler.

featureGslb (1.3.6.1.4.1.5951.4.1.1.20.10)
This represents whether gslb feature is enabled or disabled on NetScaler.

featureHttpDosProtection (1.3.6.1.4.1.5951.4.1.1.20.11)
This represents whether httpDosProtection feature is enabled or disabled on NetScaler.

featureContentFiltering (1.3.6.1.4.1.5951.4.1.1.20.13)
This represents whether contentFiltering feature is enabled or disabled on NetScaler.

featureInternalCaching (1.3.6.1.4.1.5951.4.1.1.20.14)
This represents whether internalCaching feature is enabled or disabled on NetScaler.

featureSSLVPN (1.3.6.1.4.1.5951.4.1.1.20.15)
This represents whether SSL VPN feature is enabled or disabled on NetScaler.

featureOSPF (1.3.6.1.4.1.5951.4.1.1.20.16)
This represents whether OSPF feature is enabled or disabled on NetScaler.

featureRIP (1.3.6.1.4.1.5951.4.1.1.20.17)
This represents whether RIP feature is enabled or disabled on NetScaler.

featureBGP (1.3.6.1.4.1.5951.4.1.1.20.18)
This represents whether BGP feature is enabled or disabled on NetScaler.

featureRewrite (1.3.6.1.4.1.5951.4.1.1.20.19)
This represents whether Rewrite feature is enabled or disabled on NetScaler.

featureDeltaCompression (1.3.6.1.4.1.5951.4.1.1.20.20)
This represents whether Delta Compression feature is enabled or disabled on NetScaler.

featureGSLBProximity (1.3.6.1.4.1.5951.4.1.1.20.21)
This represents whether GSLB Proximity feature is enabled or disabled on NetScaler.

featureIPv6ProtocolTranslation (1.3.6.1.4.1.5951.4.1.1.20.22)
This represents whether IPv6 Protocol Translation feature is enabled or disabled on NetScaler.

featureApplicationFirewall (1.3.6.1.4.1.5951.4.1.1.20.23)
This represents whether Application Firewall feature is enabled or disabled on NetScaler.

featureResponder (1.3.6.1.4.1.5951.4.1.1.20.24)
This represents whether Responder feature is enabled or disabled on NetScaler.

featureHtmlInjection (1.3.6.1.4.1.5951.4.1.1.20.25)
This represents whether Html Injection feature is enabled or disabled on Netscaler.

featureAGEE (1.3.6.1.4.1.5951.4.1.1.20.50)
This represents whether AGEE feature of SSLVPN is enabled or disabled on Netscaler.

featureAAA (1.3.6.1.4.1.5951.4.1.1.20.51)
This represents whether Authentication, Authorization and Auditing features for Traffic Management vservers are enabled or disabled on NetScaler.

featurePLATFORM (1.3.6.1.4.1.5951.4.1.1.20.60)
This gives platform information AGEE 1 NSVA 2 etc

featureAPPFLOW (1.3.6.1.4.1.5951.4.1.1.20.61)
This represents whether APPFLOW feature is enabled or disable on NetScaler.

featureISIS (1.3.6.1.4.1.5951.4.1.1.20.62)
This represents whether ISIS feature is enabled or disabled on NetScaler.

featureContentAdapation (1.3.6.1.4.1.5951.4.1.1.20.63)
This represents whether ContentAccelerator feature is enabled or disabled on NetScaler.

Citrix NetScaler vserverService SNMP OID Reference

vserverServiceTable (1.3.6.1.4.1.5951.4.1.3.2)
The vserver service relationship table
Indexed on: vsvrName, vsvrServiceName

vsvrServiceHits (1.3.6.1.4.1.5951.4.1.3.2.1.5)
Number of times that the service has been provided.

servicePersistentHits (1.3.6.1.4.1.5951.4.1.3.2.1.6)
Total number of persistent hits.

serviceWeight (1.3.6.1.4.1.5951.4.1.3.2.1.7)
The weight of the service tied to the vserver.

vsvrServiceName (1.3.6.1.4.1.5951.4.1.3.2.1.8)
The name of the service to which the vserver is bound.

vsvrServiceFullName (1.3.6.1.4.1.5951.4.1.3.2.1.9)
The Full name of the service to which the vserver is bound.

vserverFullName (1.3.6.1.4.1.5951.4.1.3.2.1.10)
The full name of the vserver.

vsvrServiceEntityType (1.3.6.1.4.1.5951.4.1.3.2.1.11)
The entity type of the service: service group member or service.