User contributions for Saurabh
From Notes_Wiki
- 03:58, 26 February 2024 diff hist +4,167 N Suse working with SMT server Created page with "Home > Suse > Suse working with SMT server =About SMT= To help with product updates and registrations centrally via a local server without requiring each server to have outgoing connectivity directly to Suse Customer Center (SCC) or Internet. This also helps in avoiding repeat download of OS update packages for each server over WAN link. =Error while registering an internal machine with local SMT= We might see error such as below while using lo..." current
- 03:58, 26 February 2024 diff hist +65 m Suse current
- 03:42, 26 February 2024 diff hist +126 m CentOS 8.x postfix send email through relay or smarthost with smtp authentication current
- 03:41, 26 February 2024 diff hist +86 m Paltalto firewall Monitor Session Browser current
- 03:41, 26 February 2024 diff hist +86 m Paltalto firewall Monitor allowed/denied traffic current
- 03:40, 26 February 2024 diff hist +417 m Paltalto firewall Monitor Session Browser
- 03:40, 26 February 2024 diff hist +419 m Paltalto firewall Monitor allowed/denied traffic
- 03:30, 26 February 2024 diff hist +2,163 N Reset ESXi root password Created page with "Home > VMWare platform > VMWare vSphere or ESXi > Reset ESXi root password Official KB at https://kb.vmware.com/s/article/1317898 suggests only option to reset password in ESXi 3.5 and above is by reinstalling. However as per referece link we have a few other options such as: '''Note that the below options are not validated in production yet''' ; Host profiles : Via vCenter extract existing host's host-profile. Then edit the host profile an..." current
- 03:17, 26 February 2024 diff hist +30 m VMWare vSphere or ESXi current
- 03:06, 26 February 2024 diff hist +537 m Backing up and restoring MySQL database current
- 03:02, 26 February 2024 diff hist +259 m Cloning disks or partitions using dd current
- 10:04, 25 February 2024 diff hist +733 N Useful Windows powershell options Created page with "Home > Windows > Windows Desktop Tools or Utilities > Useful Windows powershell options =Test-NetConnection= We can test network connectivity to a remote computer / port via: <pre> Test-NetConnection [[-ComputerName] <String>] -Port <Int32> [-InformationLevel <String>] [<CommonParameters>] </pre> For exmaple: <pre> Test-NetConnection -ComputerName 10.1.1.1 -Port 443 -InformationLevel "Detailed" </pre> This can be a useful alternative to Linux..." current
- 10:04, 25 February 2024 diff hist +39 m Windows Desktop Tools or Utilities
- 09:55, 25 February 2024 diff hist +605 m VMWare vSAN storage policy configuration current
- 09:51, 25 February 2024 diff hist +885 m Emacs and org-mode notes current
- 09:34, 25 February 2024 diff hist +245 m Securing organizations IT infrastructure from modern threats
- 09:30, 25 February 2024 diff hist +88 m Rocky 9.x Network Configuration current
- 09:30, 25 February 2024 diff hist +1,634 N Rocky 9.x Issues while connecting to some wireless networks using Broadcom wireless Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > Network Configuration > Rocky 9.x Issues while connecting to some wireless networks using Broadcom wireless For messages such as below repeated multiple times in '<tt>/var/log/messages</tt>': <pre> Feb 25 13:45:28 barjatiyarklp wpa_supplicant[1660]: wlp3s0: CTRL-EVENT-SCAN-FAILED ret=-22 retry=1 </..."
- 06:46, 24 February 2024 diff hist +205 m Securing organizations IT infrastructure from modern threats
- 06:17, 24 February 2024 diff hist +661 m Securing organizations IT infrastructure from modern threats
- 04:38, 20 February 2024 diff hist +3,494 m Securing organizations IT infrastructure from modern threats
- 04:13, 20 February 2024 diff hist +1,262 N Live Optics Created page with "Home > VMWare platform > VMWare Platform Miscellaneous > Live Optics =Getting current resource utilization= We can use liveoptics for getting current resource utilization such as: * 95% IOPS * Peak and 95% CPU usage * Peak and 95% memory usage * Overall storage usage etc. for a physical host, hypervisor such as Hyper-V or ESXi, etc. This information is critical if we are trying to size a new environment during migration - P2V or V2V or hard..." current
- 04:09, 20 February 2024 diff hist +17 m VMWare Platform Miscellaneous current
- 04:08, 20 February 2024 diff hist +223 m RVTools current
- 04:07, 20 February 2024 diff hist +12 m VMWare Platform Miscellaneous
- 04:07, 20 February 2024 diff hist +1,301 N RVTools Created page with "Home > VMWare platform > VMWare Platform Miscellaneous > RVTools =Getting information about ESXi or vCenter environment= We can get detailed information about ESXi or vCenter environment including information on health issues such as: * Connected CD/DVD drive * CPU/Memory configuration issues * Zombie disks by using RV tools. We only need to give ESXi host / vCenter information (IP, Username, Password) and then within a minute we can see all t..."
- 05:15, 1 February 2024 diff hist +1,857 m CentOS 8.x Securing a Linux machine
- 13:23, 26 January 2024 diff hist +1,818 m Securing organizations IT infrastructure from modern threats
- 12:30, 26 January 2024 diff hist +4,620 m Securing organizations IT infrastructure from modern threats
- 11:55, 26 January 2024 diff hist +374 m CentOS 8.x Securing a Linux machine
- 08:41, 19 January 2024 diff hist +414 m Securing organizations IT infrastructure from modern threats
- 07:55, 6 December 2023 diff hist +3,076 m Securing organizations IT infrastructure from modern threats
- 05:04, 6 December 2023 diff hist +1,256 m Securing organizations IT infrastructure from modern threats
- 12:40, 4 December 2023 diff hist +66 m Security tips
- 12:39, 4 December 2023 diff hist +12,133 N Securing organizations IT infrastructure from modern threats Created page with "Home > Security tips > Securing organizations IT infrastructure from modern threats To secure an organization against modern threats consider following: ; User VLANs gateway at firewall : All VLANs should be only L2 at core / distribution / access level. Gateway for all users should be at perimeter firewall. All traffic between two user VLANs should go via firewall. : In this case have separate VLANs for printers, Biometric devices, CCTV, etc...."
- 05:47, 12 November 2023 diff hist +38 m Rocky 9.x System Administration
- 05:47, 12 November 2023 diff hist +433 N Rocky 9.x Network Configuration Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > Network Configuration *Rocky 9.x Look at network interface statistics Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > Network Configuration"
- 05:47, 12 November 2023 diff hist +1,545 N Rocky 9.x Look at network interface statistics Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > Network Configuration > Look at network interface statistics =Look at per interface statistics= Per-interface statistics can be seen at: <pre> /sys/class/net/<interface-name>/statistics </pre> Refer: * https://stackoverflow.com/questions/349576/linux-re..." current
- 05:26, 12 November 2023 diff hist +278 m Recommended firefox plugins current
- 05:20, 12 November 2023 diff hist +183 m Convert image to base64 current
- 05:17, 12 November 2023 diff hist +50 m VMWare vSphere or ESXi
- 05:17, 12 November 2023 diff hist +663 N Unable to login into ESXi host web UI or SSH Created page with "Home > VMWare platform > VMWare vSphere or ESXi > Unable to login into ESXi host web UI or SSH If you are unable to login to ESXi Web UI and even SSH while the same password is working on ESXi DCUI console ( https://kb.vmware.com/s/article/2148363 ) then it is possible that ESXi is locked. Through DCUI console disable ESXi lockdown mode and after that the Web UI and SSH login should work. Refer: * https://communities.vmware.com/t5/ESXi-Discus..." current
- 05:13, 12 November 2023 diff hist +86 m Online tools and utilities
- 05:13, 12 November 2023 diff hist +516 N Convert image to base64 Created page with "Home > Online tools and utilities > Convert image to base64 While writing HTML code, it is possible to embed image directly in the HTML page instead of referring it from some other location as explained at https://www.w3docs.com/snippets/html/how-to-display-base64-images-in-html.html For this to convert image to base64 we can use online tool at: * https://www.base64encoder.io/image-to-base64-converter/ Home > Online tools and..."
- 05:04, 12 November 2023 diff hist +35 m Rocky 9.x Desktop tools and applications current
- 05:04, 12 November 2023 diff hist +638 N Rocky 9.x decompress xz files Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > Desktop tools and applications > Rocky 9.x decompress xz files To decompress .xz files on rocky linux we can use: # Install xz utilities #:<pre> #:: dnf -y install xz #:</pre> # Then decompress xz file using: #:<pre> #:: xz --decompress <filename> #:</pre> Refer: * https://computingforgeeks.com/how-to-extract-xz-files-on-linux/ Home..." current
- 04:59, 12 November 2023 diff hist +31 m Rocky 9.x Desktop tools and applications
- 04:59, 12 November 2023 diff hist +2,078 N Rocky 9.x Reopening closed tabs in firefox Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > Desktop tools and applications > Firefox browser > Reopening closed tabs in firefox Sometimes before closing the browser we may want to save all tabs to reopen them again later. Also a few times instead of closing another window we may close firefox browser along with all tabs...." current
- 04:53, 12 November 2023 diff hist +442 N Rocky 9.x Firefox browser Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > Desktop tools and applications > Firefox browser *Rocky 9.x Reopening closed tabs in firefox Home > Rocky Linux or CentOS > Rocky Linux 9.x > Desktop tools and applications > Firefox browser" current
- 04:52, 12 November 2023 diff hist +33 m CentOS 7.x Firefox current
- 04:51, 12 November 2023 diff hist +32 m Firefox current
- 04:51, 12 November 2023 diff hist +244 m CentOS 8.x Firefox current
- 04:30, 15 October 2023 diff hist +93 m Windows 11 current
- 04:30, 15 October 2023 diff hist +943 N Windows 11 Enable clipboard history to allow pasting from multiple different clipboards Created page with "Home > Windows > Windows 11 > Enable clipboard history to allow pasting from multiple different clipboards =Enable clipboard history in settings= It is possible to have more than one clipboard in Windows by enabling: # Go to Settings -> System -> Clipboard # Enable toggle buttom for clipboard history. Refer: * https://www.howtogeek.com/671222/how-to-enable-..." current
- 04:24, 15 October 2023 diff hist +2 m Paloalto NAT examples current
- 04:23, 15 October 2023 diff hist 0 m Paloalto firewall captive portal current
- 04:20, 15 October 2023 diff hist +1,829 m Paloalto firewall AD integration current
- 04:09, 15 October 2023 diff hist +1,531 m CentOS 8.x apache troubleshooting current
- 05:53, 8 October 2023 diff hist +980 N Rocky 9.x Force rescan or check of xfs filesystem on reboot Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > File system management > Force rescan or check of xfs filesystem on reboot To force rescan or check of xfs filesystem on reboot use: # Edit /etc/fstab file and change values in last two columns to non-zero # Create a file using: #:<pre> #:: t..." current
- 05:49, 8 October 2023 diff hist +513 N Rocky 9.x file system management Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > File system management *Rocky 9.x Force rescan or fsck of ext filesystem on reboot *Rocky 9.x Force rescan or check of xfs filesystem on reboot Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > Rocky 9.x file syst..."
- 05:49, 8 October 2023 diff hist +338 m CentOS 8.x File system management current
- 05:49, 8 October 2023 diff hist +122 m CentOS 7.x file system management current
- 05:43, 8 October 2023 diff hist +38 m Rocky 9.x System Administration
- 05:42, 8 October 2023 diff hist +873 N Rocky 9.x Force rescan or fsck of ext filesystem on reboot Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > File system management > Force rescan or fsck of ext filesystem on reboot We may want to enforce fsck or checking of ext partition on reboot. For that use: <pre> tune2fs -c 1 /dev/sdXY </pre> The above will cause filesystem to get scanned on..." current
- 05:39, 8 October 2023 diff hist +65 m Rocky 9.x Package management
- 05:39, 8 October 2023 diff hist +67 m CentOS 8.x Package management current
- 05:36, 8 October 2023 diff hist +209 m CentOS 8.x dnf basics current
- 05:16, 8 October 2023 diff hist +213 m CentOS 8.x Package management
- 05:16, 8 October 2023 diff hist +1,468 N CentOS 8.x migrate to CentOS 8.x Stream Created page with "Home > CentOS > CentOS 8.x > System Administration > Package management > CentOS 8.x migrate to CentOS 8.x Stream If you have older CentOS 8 machines they wont work now as repositories have been discontinued. To make them usable, we can migrate from CentOS to CentOS 8.x stream using: # Change all repository configuration as follows ##..." current
- 05:09, 8 October 2023 diff hist +236 m CentOS 8.x Control Web panel current
- 05:08, 8 October 2023 diff hist +974 N CentOS 8.x Control Web panel miscellaneous issues Created page with "Home > CentOS > CentOS 8.x > Email servers > Control Web panel > Miscellaneous issues =Disable Excessive resource usage alerts for processes= Control web panel will send periodic alerts for processes using too much resources. For example for zabbix-agent2. To disable such alerts use: # SSH to server as root # Edit file '<tt>/etc/csf..." current
- 03:32, 12 September 2023 diff hist +37 m CentOS 7.x convert from ImageMagick current
- 03:31, 12 September 2023 diff hist +379 m Convert current
- 03:30, 12 September 2023 diff hist +244 m Pdftk current
- 06:36, 8 September 2023 diff hist +1,074 m Build VxRail 7.0 current
- 06:27, 8 September 2023 diff hist +39 m Enterprise security devices or applications current
- 06:27, 8 September 2023 diff hist +1,843 N Planning for migrating a firewall Created page with "Home > Enterprise security devices or applications > Planning for migrating a firewall While coordinating on downtime / planning for migrating to a new firewall, it makes sense to have following information : # From when to when is the downtime? # Who is the contact person available during downtime to help with: #* Cable identification (ISP1 cable, LAN cable, etc.) locally on site #* Coordiante with local users on the site if and when services are..." current
- 06:24, 8 September 2023 diff hist +365 m Paloalto firewall captive portal
- 06:21, 8 September 2023 diff hist +355 m Paloalto general notes or best practices current
- 06:19, 8 September 2023 diff hist +249 m Paloalto firewall current
- 06:19, 8 September 2023 diff hist +119 m Paloalto firewall captive portal
- 06:17, 8 September 2023 diff hist +349 m Paloalto firewall captive portal
- 06:14, 8 September 2023 diff hist +1,781 N Paloalto URL filtering Created page with "Home > Enterprise security devices or applications > Paloalto firewall > Paloalto URL filtering =Creating desired URL filtering policy= Clone the default URL filtering policy default and configure a URL filtering policy as per organization (Eg block violence sites). The meaning of category eg business is not explained anywhere on the interface and is left up to interpretation. However there is a check URL link. https://urlfiltering.paloalt..." current
- 06:10, 8 September 2023 diff hist +407 N Paloalto troubleshooting options Created page with "Home > Enterprise security devices or applications > Paloalto firewall > Paloalto troubleshooting options *Paloalto firewall packet capturing *Paltalto firewall Monitor Session Browser *Paltalto firewall Monitor allowed/denied traffic Home > Enterprise security devices or applications > Paloalto firewall > Paloalto troubleshooting options"
- 06:10, 8 September 2023 diff hist +773 N Paltalto firewall Monitor allowed/denied traffic Created page with "Home > Enterprise security devices or applications > Paloalto firewall > Paloalto troubleshooting options > Paltalto firewall Monitor allowed/denied traffic Go to Monitor -> Logs -> Traffic. Here we filter for source/destination. Here unlike session monitoring we can see historic (Based on log storage capacity of firewall) sessions and whether they were allowed or denied. Example filter ( addr.dst in 192.168.0.0/24 ) Same as monitor ->..."
- 06:09, 8 September 2023 diff hist +961 N Paltalto firewall Monitor Session Browser Created page with "Home > Enterprise security devices or applications > Paloalto firewall > Paloalto troubleshooting options > Paltalto firewall Monitor Session Browser We can monitor for sessions from specific source or to specific destinations to see whether they are even going through firewall. Once we go to Monitor -> Session Browser and configure filters. For filter click on any source / destination etc. listed and change the value. Example filter to s..."
- 06:08, 8 September 2023 diff hist +78 m Paloalto firewall packet capturing current
- 06:06, 8 September 2023 diff hist +1,529 N Paloalto Policy based forwarding (PBF) Created page with "Home > Enterprise security devices or applications > Paloalto firewall > Paloalto Policy based forwarding (PBF) On PBF note that: * We dont need PBF for incoming NAT reply packets. Using ECMP with symmetric return on router is enough. * Dont do PBF with a specific ISP when the same source machine LAN machine is NAT with public IP of other ISP. In that case reply packets try to use a different ISP (As per PBF) and configuration does not works..." current
- 06:03, 8 September 2023 diff hist +2 m Paloalto using ECMP for active/active ISP connectivity current
- 06:00, 8 September 2023 diff hist +1,866 N Paloalto using ECMP for active/active ISP connectivity Created page with "Home > Enterprise security devices or applications > Paloalto firewall > aloalto using ECMP for active/active ISP connectivity =Enabling ECMP= If organization has multiple ISPs then: # Enable ECMP in virtual router with symmetric return. We can enable up to 4 equal cost routes via ECMP # After commit check "runtime stats" local routing table of the device (Should be done on device, cant be done via panorama) and validate that we have default r..."
- 05:46, 8 September 2023 diff hist +779 m Paloalto NAT examples
- 05:44, 8 September 2023 diff hist +781 N Paloalto NAT examples Created page with "Home > Enterprise security devices or applications > Paloalto firewall > Paloalto NAT examples =NAT of public IP to private IP on a few ports= To NAT a public IP:port to private IP:port use: # Create WAN to WAN Security rule with destination as NATed public IP with all services and all ports # Create NAT rule from WAN to LAN with source IP as any and destination IP as WAN public IP. After NAT change the destination IP to LAN IP. Here in NAT..."
- 05:41, 8 September 2023 diff hist +2,779 N Paloalto Configure firewall for proxy DNS Created page with "Home > Enterprise security devices or applications > Paloalto firewall > Paloalto Configure firewall for proxy DNS Palo Alto Networks firewalls can act as DNS servers for local users. By configuring DNS Proxy on the firewall, you can intercept DNS requests from internal clients and forward them to external DNS servers or resolve them locally. =Configure DNS proxy via setup and service route configuration= To check the DNS settings on a Palo A..." current
- 05:34, 8 September 2023 diff hist +543 N Paloalto general notes or best practices Created page with "Home > Enterprise security devices or applications > Paloalto firewall > Paloalto general notes or best practices =Add /32 netmask for a single IP= Adding netmask eg /32 for a single IP is important. Without this the policy / rule may get accepted and committed but does not works unless we add /32 netmask. This should be followed for all address objects without fail. Home > Enterprise security devices or applications >..."
- 04:48, 8 September 2023 diff hist +196 m Configuring nrpe based internal service checks current
- 04:46, 8 September 2023 diff hist +45 m CentOS 8.x systemd or systemctl
- 04:46, 8 September 2023 diff hist +435 m Check cluster status via systemd service current
- 04:45, 8 September 2023 diff hist +103 m Check cluster status via systemd service
- 04:44, 8 September 2023 diff hist +118 m Check cluster health via nagios plugin current
- 04:43, 8 September 2023 diff hist +163 m SAP setup and maintenance