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Archive for the ‘Networking’ Category

Debugging a Site to Site VPN on an Juniper SRX series

Within this article we will look at the various steps required in debugging a Site to Site VPN on an SRX series gateway. 1. CONFIRM CONFIGURATION First of all check the VPN configuration. This is also useful if and when you need to confirm the Phase 1 and Phase 2 parameter’s with the remote end. […]

CAN NOT ACCESS TO HTTPS MANAGEMENT OF JUNIPER SSG VI CHROME (ERROR CODE: ERR_SSL_VERSION_OR_CIPHER_MISMATCH)

Can not access to https management of Juniper SSG through Chrome (Error code: ERR_SSL_VERSION_OR_CIPHER_MISMATCH) A secure connection cannot be established because this site uses an unsupported protocol. Error code: ERR_SSL_VERSION_OR_CIPHER_MISMATCH Resolution 1: 1. Go to the “Chrome://flags” from the address bar. 2. Find “Minimum SSL/TLS” version support” 3. Select ” SSLv3″ option. Resolution 2: Access to WEB […]

Subnet Mask Cheat Sheet

IPv4 Subnet Mask Cheat Sheet Addresses Netmask Amount of a Class C /31 2 255.255.255.254 1/128 /30 4 255.255.255.252 1/64 /29 8 255.255.255.248 1/32 /28 16 255.255.255.240 1/16 /27 32 255.255.255.224 1/8 /26 64 255.255.255.192 1/4 /25 128 255.255.255.128 1/2 /24 256 255.255.255.0 1 /23 512 255.255.254.0 2 /22 1024 255.255.252.0 4 /21 2048 255.255.248.0 […]

RSOP – Invalid Name Space

RSOP – Invalid Name Space Recently had an issue where an entire site was not downloading domain policies. After a thorough search and different attempts to fix the issue below batch file fixed the issue: Windows Management Instrumentation fails due to receiving an event or error concerning missing or failure to load WMI Provider, or […]