If you are dealing with network monitoring, you might consider using SMSes because they are completely independent. On the other hand, many monitoring systems don’t support HTTP calls (which is the usual way for sending them) but most of them support sending e-mails. Here I want to describe how to configure your server to receive e-mails and transform them to SMSes. Continue reading E-mail to SMS
My USB 3.0 to VGA adapter arrived a few days ago so I tested the FM transmission example. Continue reading FM transmission test with FL2000
Nothing special, just use undocumented command sh and you are there (I found it out by a mistake):
danman@silverhorse:~$ nmap 10.0.0.138 Starting Nmap 7.60 ( https://nmap.org ) at 2018-03-26 22:54 CEST Nmap scan report for 10.0.0.138 Host is up (0.013s latency). Not shown: 996 closed ports PORT STATE SERVICE 21/tcp open ftp 22/tcp open ssh 23/tcp open telnet 80/tcp open http Nmap done: 1 IP address (1 host up) scanned in 3.14 seconds danman@silverhorse:~$ telnet 10.0.0.138 Trying 10.0.0.138... Connected to 10.0.0.138. Escape character is '^]'. ZyXEL VDSL Router Login: admin Password: admin > help ? help logout exit quit reboot adsl xdslctl xtm brctl cat loglevel logdest virtualserver ddns df dumpcfg dumpmdm meminfo psp kill dumpsysinfo dnsproxy syslog echo ifconfig ping ps pwd sntp snmp sysinfo tftp wlctl arp defaultgateway dhcpserver dhcpcondserv dns lan lanhosts passwd ppp restoredefault route save swversion uptime cfgupdate swupdate exitOnIdle wan rip igmp wlan telnetd natp sysstate sipalgctl celld autoexec fileShare igmp btt ledctl > sh shell Password: admin ~ # ls bin etc linuxrc proc tmp vmlinux.lz data firmware mnt sbin usr webs dev lib opt sys var
If your pod exited with exit code 137 so you see something like this in pod Details page:
Last State Terminated at Jan 7, 2018 5:00:15 PM with exit code 137 (Error)
your pod has been killed with signal 9. Continue reading Openshift: exit code 137
If you tried to add node to your etcd cluster and it failed, your cluster may have lost quorum and will not start again. To recover it you need to create new cluster identity. This is a short howto. Continue reading How to recover containerized etcd in Openshift cluster
Together with some good guys we added support for Kimax U25AWF-H1 WiFi HDD case to LEDE. You can see my pull request here and commit here. This firmware also works on my Blueendless U-35WF. If you have this hardware you can try it. Finally, here are some photos of my devices guts.
If you need to periodically run some job in OpenShift you have several options. Continue reading Cron jobs in OpenShift
If you are interrested in security devices this post may be for you. Recently I’ve found a software which makes a GPG security device out of a STM32. It’s called Gnuk. You just need a compatible board, programmer, flash the firmware and you are ready to go. I was just hoping to find some cheap device to flash to play with it.
Last days I’ve been experimenting with various features of OPI. One thing I’ve always been interested in is HW encoding. There is some information on linux sunxi wiki on this topic ( ), which say that it’s not something straightforward and opensource.
IP multicast is an interesting technology. It’s main purpose is to
save network bandwidth as much as possible – traffic is sent to hosts
which asked for it only (as opposed to broadcast). On the other
side, you need smarter (manageable) switches and separate and
non-trivial configuration on both routers and switches. Even more
complicated it is when you try to make it work over VPN. Continue reading Multicast over “stupid” networks