Cisco ASAv HA Configurations
Configuring high availability requires two identical ASAs connected to each other through a dedicated failover link and, optionally, a Stateful Failover link. The health of the active interfaces and units…
Configuring Checkpoint Gateway Forwarding Logs to External Syslog Server
Check Point Management Server is not only the central policy management place for Check Point products, but also holds all Check Point gateways logs. In real environment, external third party…
O Errors During TFTP Cisco IOS Image Copying
I were using TFTPD32 to transfer a image to Cisco 3560 switch. It was fine at the beginning then when it was almost done I got lots of O errors.…
Juniper SRX Minor Alarm Messages – Autorecovery and Rescue Information
During working on Juniper products, such as SRX, NSM and Space, sometimes, there are minor alarms in the system and it requires some actions to clear those alarms based on…
Comparison of Cisco Integrated Services Routers: (1800,2800,3800) vs (1900,2900,3900) vs 4000
For Branch switches, please check Comparison of Cisco Switches: (2960 vs 3560), (Cisco 3560 X vs 3650 vs 3750-X vs 3850) Cisco 2900, 3900, and 4000 (4300 and 4400) Series…
Basic Linux Commands
1. Basic Commands man ： manualls ：List Directory Contentspwd ：print working directorycd ：change directorymkdir ：Make directorycp ：Copymv ：Movefind and locate and whereiskill passwd ：Passwordmd5sum ：Compute and Check MD5 Message Digesthistory…
Cisco Switch 2960 / 3560 Password Recovery Procedures
Worked on a used cisco switch 2960 which has been configured password. Following steps have been recorded how to get into recover mode. 1. Connect Console Cable Cisco provides a…
JunOS Space – Warning Message for Consolidated Configuration
Junos Space is a comprehensive network management solution that simplifies and automates management of Juniper’s switching, routing, and security devices. To those security administrator who like command line, they will…
Cisco IKEv1 Site-to-Site IPSec Configuration on IOS Routers (1) – High Availability IPSec
IPsec is a framework of open standards that provides data confidentiality, data integrity, and data authentication among participating peers. It provides these security services at the IP layer; it uses…
Using Symantec SSL PKI to Authenticate Cisco IOS IPSec VPN – HA Deployment
Digital certificates as an authentication method for IPSec VPNs is becoming increasingly popular for both remote access and site-to-site deployments. The use of digital certificates requires some form of PKI…
Cisco IKEv1 Site-to-Site IPSec Configuration on IOS Routers (2) – Using Two Different CA Certificates
Pre-shared keys and digital certificates are two primary authentication methods in IKE that can be used in the context of IPSec VPN deployments. Digital certificates provide a means to digitally…
Comparison of Cisco Switches: (2960 vs 3560), (Cisco 3560 X vs 3650 vs 3750-X vs 3850)
For Branch Routers, please check Comparison of Cisco Integrated Services Routers: (1800,2800,3800) vs (1900,2900,3900) vs 4000 Cisco 2960 vs 3560 Switch 2960 series switches are L2 only switches. Meaning that…