The following article is a brief introduction to IPSec VPN that is utilized to provide a logical connection between 2 sites (Site to Site) or a client and a site (Client to Site). The article is written to provide the key terms behind IPSec VPN … “Basics – IPSec VPN”
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Usually when there is a wildcard like (““) at the beginning of the pattern, Juniper SRX expects a character before the wildcard which can be matched one or multiple times. When we use a custom pattern with nothing preceding the wildcard (““) the device will … “Juniper SRX – IDP Pattern”
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While using Ansible 2.4.3 for the very first time after upgrading, I received the following error: [DEPRECATION WARNING]: [defaults]hostfile option, The key is misleading as it can also be a list of hosts, a directory or a list of paths . This feature will be … “Ansible hostfile Deprecated”
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# clsh tmsh show sys hardware | grep ‘Host Board Serial’ The above command is run from bash shell on the F5 in order to identify the serial number of all the blades in an F5 Viprion device. # tmsh show sys hardware | grep … “Serial Number – Viprion Blades and Chassis”
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You can follow SOL13151 in order to increase the packets/sec value. However, I would caution against doing it or at least recommend keeping the value smaller. The default setting is in place to prevent the F5 from overwhelming its resources by sending out RST. This could potentially … “F5 – RST or ICMP Packet Rate”
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F5 utilizes iControl REST API as part of their automation toolkit. REST API is a powerful way to automate F5 management. iControl REST API was introduced by F5 in 11.5 code version. 11.6 code version is the first major code version with a relatively stable … “F5 iControl REST”
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These are a few quick checks as part of the GTM code upgrade maintenance that will be useful. As part of the maintenance preparatory work, check the license “service check date” as per K7727 Before starting the code upgrade and after the code upgrade, the … “GTM Code Upgrade”
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This is a short list of commonly available network troubleshooting tools that has been of use to me: Ping. traceroute. nslookup/dig curl. Error logs on the device. tcpdump. Developer tools within a browser like Chrome/FF. Wireshark.
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A simple way to clear the contents of ssh key file without deleting the file: echo -n > /home/user/.ssh/known_hosts
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VTP stands for VLAN Trunk Protocol. VTP is used to propagate VLAN cconfiguration. VTP advertisements are multicasted. They are sent every 5 minutes or whenever there is a change in VLAN configuration. VTP revision number is included in these advertisements. Whenever a client receives a … “Basic VTP”
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