It’s a known fact that modern Chinese languages/dialects do not have initial consonant clusters like those in English or many other languages. An initial consonant cluster is like the pl- in play, gl- in glass and even str- in strong. So were there consonant clusters like those in Chinese in the past? Most scholars on …
Read more “(Presumed) Initial Consonant Clusters in Old Chinese, Part 1”
Squid Proxy Server should be the most widely-used proxy server and I have used it for more than 20 years. In the past if you inspected the content of its log files you should be able to see something like “TCP_HIT“, “TCP_MEM_HIT“, or “TCP_MISS” a lot. But you won’t be able to see so many …
Read more “Some Thoughts on Squid Proxy Server”
The network problem described in the previous post did not really go away immediately. As said in that post the problem was from the GPON modem (ONU) itself, I still started to experience problems again the very next day. I wouldn’t think it’s a good idea to turn the modem off and on often and …
Read more “New Network Problem, Continued”
These days I’ve been experiencing problems with my home network. Normally problems like this should not be too difficult to troubleshoot. Yet as more than one thing has been changed in the past few weeks, it no longer is the case. What I have changed recently includes upgrading several systems to Fedora 40 and a …
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Sending alerts from an F5 Big IP device is not so similar to doing it from a vCenter Server Appliance. The major difference is that it has its own config file to deal with alerts. The config file is /config/user_alert.conf and you can put custom rules in it. Also the log file /var/log/ltm stores events …
Read more “Sending F5 BIG-IP Alerts to Telegram/Discord”
Sending alerts from a FortiGate device is similar to doing it from a vCenter Server Appliance. Once we know the content of an email alert we can start to process it to meet our needs. The following is an example alert from my company’s FortiGate device. An internal VM running Sendmail is used as the …
Read more “Sending FortiGate Firewall Alerts to Telegram/Discord”
Last Thursday evening (August 1, 2024) I experienced major problems with my outgoing network connections. The weird part was that the connection problems were mostly IPv4 related. I had on and off connections to sites or ips that use pure IPv4 addresses and experienced basically no problems with sites that also have IPv6 addresses as …
Read more “Networking Problem”
Now it’s time to talk about sending alerts to Telegram. Indeed the alerts were first sent to Telegram in late 2020 and a new decision was made to switch to Discord instead this May. The script part will be largely the same. The major difference is that Discord and Telegram treat new lines differently, so …
Read more “Sending VMware vCenter Alerts to Telegram/Discord – Part 3”
Now it’s the hard part on how to redirect the email alerts to Telegram or Discord. As Discord provides webhooks directly, we can format the the received email stream and then use the curl command to send the alert to Discord. We can get the webhook from Copy Webhook URL. As said in the previous …
Read more “Sending VMware vCenter Alerts to Telegram/Discord – Part 2”
vCenter alerts sent to Discord vCenter has built-in alarms for various occasions and you can use emails to send alarms. This part has been quite useful for monitoring purposes. But what if you would like to send the alerts to instant messaging services like Telegram or Discord instead? vCenter does not have built-in support for …
Read more “Sending VMware vCenter Alerts to Telegram/Discord – Part 1”
