Espacio Mixto

If you are a System Administrator, you probably use MobaXterm as your go-to tool for its versatility: integrated X server, SSH client, SFTP file transfer, and more. However, since version 21.1, many users started experiencing a frustrating issue: MobaXterm requests the password three times before allowing access to certain hosts, particularly those running Solaris . In this article, I’ll explain why this happens and how to fix it permanently by adjusting your SSH configuration. The Problem: Why does MobaXterm ask for the password repeatedly? At first, you might think the SSH package was upgraded on the server side or that a system-wide OS upgrade changed the security policies. However, if you test the connection with other clients like Putty.exe , the issue does not occur. The root cause lies in the Preferred Authentications order. MobaXterm tries several methods that the server might not accept immediately, exhausting the allowed attempts before falling back to the interactive keyb...

This is a handy way to get a lot of info about the switch/port an interface is connected to. CDP stands for  Cisco Discovery Protocol , which is a layer 2 protocol and is used to share information about other directly connected Cisco equipment (WikiPedia). ## ether[20:2] == 0x2000 - Capture only packets that are starting at byte 20, and have a 2 byte value of hex 2000 LLDP stands for  Link Layer Discovery Protocol  and replaces CDP. LLDP is a vendor-neutral Data Link Layer protocol used by network devices for advertising of their identity, capabilities and neighbours (WikiPedia). ##tcpdump -i eth0 -s 1500 -XX -c 1 'ether proto 0x88cc' The folllowing command shows how to use tcpdump if you ever need switch/port info on a linux host assuming you are connected to a Cisco device: tcpdump -nn -vv -i   -s 1500 -c 1 '(ether[12:2]=0x88cc or ether[20:2]=0x2000)' Example: root@arrakis:~ # tcpdump -nn -vv -i eth0 -s 1500 -c 1 '(ether[1...

Saludos nuevamente, He de comentarles que no le habia dado movimiento al blog, debido a que la semana pasada asisti al curso de "SUN Cluster 3.1". La verdad es que la persona que nos dio el curso lo hizo muy ameno, el curso fue muy interesante, he de ser sincero, Solaris no es mi Sistema Operativo preferido, pero despues de asistir al curso, mi opinión con respecto a este sistema ha cambiado. Eso sí, para la configuración de un Cluster con "Solaris/SUN Cluster" se tienen que cuidar detalles de compatibilidad en varios aspectos como: La aplicación a ejecutar. Versión de Solaris. Hardware a usar (servidor, procesadores, memoria ram, interfaces de red, almacenamiento de datos, etc.) Tener claro si sera del tipo "failover" o "scalable" (luego les contare con mas detalle sobre esto).     Imagen de Wikipedia :