It is possible with Config Security Firewall (CSF) to open an inbound port from a specific source IP address. This is defined outside of the global configuration (csf.conf), within a dedicated config file. 1. Open the following file with your favorite text editor :
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/etc/csf/csf.allow |
2. Follow this syntax to open a specific port for… Read More »
Having the following error when trying to add a new hypervisor to an existing cluster in VMware vCenter? A general system error occurred: Time out waiting on vpxa to start This is most likely happening with the ESXi version is greater than the ones supported by your currently running vCenter. Have a look at the… Read More »
Under some rare circumstances, you may require to change the default route metric. The first way of doing should be through the “ifcfg-ethX” configuration file by adding the “METRIC=” statement. However it has been found to be inefficient for me and had to apply it using “ip route” as followed :
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ip route del default via <your.default.gateway.ip> dev <interface> proto static metric <current.metric> ip route add default via <your.default.gateway.ip> dev <interface> proto static metric <new.metric> |
Example :
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ip route del default via 1.2.3.4 dev eth0 proto static metric 100 ip route add default via 1.2.3.4 dev eth0 proto static metric 90 |
If your Windows 10 system suddenly stopped booting and show the following error message : VOLMGRX INTERNAL ERROR It most likely mean that your software RAID volume has failed. It may indicate a hardware underlying issue, such as a failed drive or the mirror just broke and is no longer in sync. To find out,… Read More »
Encountered the following error during the Seafile installation process? Error: Failed to init ccnet database: Specified key was too long; max key length is 767 bytes Something went wrong while the installation script attempted to deploy the database. Normally, InnoDB has a limitation of 767 bytes and 1000 bytes for MyISAM. Creating the database with… Read More »
Experiencing the following issue trying to delete a domain in your cPanel account? The subdomain hostname_domain.tld does not correspond to domain.tld. Have a look if the domain isn’t listed in “Addon Domains” or “Alias”. If the domain show up in either of those category, try deleting from there first. In this case, it turned out… Read More »
As much as I love Windows Server 2016 compared to previous versions, there is nothing that annoy me more that the Server Manager opening when I logon. Fortunately, there is a way to disable it using Group Policy editor. NOTE : If you are not within a domain group environment (Active Directory), there is an… Read More »
Experiencing the following issue trying to update your Debian distro using apt-get? # apt-get update Ign:1 http://deb.debian.org/debian stretch InRelease Hit:2 http://deb.debian.org/debian stretch Release Ign:3 http://repo.r1soft.com/apt stable InRelease Hit:4 http://repo.r1soft.com/apt stable Release Hit:5 http://security.debian.org/debian-security stretch/updates InRelease Ign:8 https://download.webmin.com/download/repository sarge InRelease Hit:9 https://download.webmin.com/download/repository sarge Release Err:11 https://packages.sury.org/php stretch InRelease FailReason: ConnectionRefused Reading package lists… Done W: Failed… Read More »
Having the following message while trying to setup a DNS cluster with cPanel? Unknown API Error when attempting to contact the remote system This error is usually caused by firewall blocked port (most likely tcp-2087) and/or DNS record pointing to the wrong IP. To find out, have a look at the following log file :… Read More »
Here are some useful commands to manage the Exim mail server queue. Show the mail queue content :
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exim -bp |
Show the amount of mail in the queue :
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exim -bpc |
Delete a specific message in the queue, with the help of the first command in this example (exim -bp) to get the message ID :
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exim -Mrm <message_id> |