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Development System & Network

Need help I have the 3com 48port network switch

Hello I have the 3Com 4800G 3CRS48G-48P-91 Gigabit Switch 48 RJ45 Ports w/ PoE + 10G 2-Port LCM and I am trying to use the console port on it but I can’t find the software that I need to be able to talk to the network switch and/or control each port on it. If anyone […]

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Development System & Network

Setup SNMP with external server

I have installed Zabbix and Cacti on a server that I intend to use to monitor some other servers. I have added one of the other servers (separate network), and I have tried to configure the SNMP settings on this server by editing the snmpd.conf: com2sec MyServer <Monitoring Server IP> public However, my monitoring server […]

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Development Docker System & Network

Is it possible to prevent Docker from registering itself on the DNS of a network in Swarm?

I want to create a common backend overlay network for Kafka where other services can join the network to connect to the Kafka server. However, I want to avoid name clashes so I only want to be able to connect to the Kafka service by name, but do not allow anyone else to register their […]

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Development System & Network

carbonite restore – stuck for 4 hours ‘analyzing metadata’

Carbonite Safe Server backup. Process is running on 3 cores with no sign of progress. It usually restores in a few minutes. (Have contacted their tech support, response time is 24 hours )

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Development Google System & Network

Using Google Cloud Armor to Block Requests to Google Cloud Storage

Does Google Cloud Armor support blocking requests to public Google Cloud Storage buckets? I haven’t been able to determine if GC Storage counts as a backend service. The scenario is I would like to block various IP addresses from accessing a public GC Storage bucket. I would want to block Canadians, Azure, and IPs scanning […]

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Development System & Network

Publishing CNAME to Avahi over DBUS requires long lived process

I am attempting to setup CNAMEs in Avahi in order to broadcast multiple hostnames. I’ve found a variety of examples online that all work but they all require long lived processes: https://github.com/Dalee/avahi-cname-aliases/blob/master/avahi_cname_aliases/init.py#L83 # run and stay foreground def run(self): self.set_handlers() self.load_aliases() self.publish_aliases() # keep aliases published while self.running: time.sleep(TTL) https://github.com/george-hawkins/avahi-aliases-notes/blob/master/avahi-alias#L48 for name in sys.argv[1:]: publish_cname(name) […]

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Development System & Network

Robocopy – ERROR 87 (0x00000057) Accessing Destination Directory

I’m currently using a robocopy in a loop performing the following command over a number of different directories: robocopy $sourceFolder $purgeFolder /MOV /LEV:0 /MINAGE:$OlderThan All source folder paths are at the same level in our directory structure and have exactly the same permissions however when the loop reaches certain directories robocopy just continually reports ERROR […]

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CMS Development Magento MySQL System & Network

mysqltuner wants me to set join_buffer_size > 256.0M?

I have a 16GB dedicated server running 1 wordpress and 1 magento site! For the last month I have been trying to get mysql optimized! [root@server ~]# ./mysqltuner.pl MySQLTuner 1.7.19 – Major Hayden Bug reports, feature requests, and downloads at http://mysqltuner.com/ Run with ‘–help’ for additional options and output filtering [–] Skipped version check for […]

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Development System & Network

IPv6 only bound services accessible from IPv4 on dual stack Linux host: how does it work?

I have this situation where Apache is listening on :::443 only on a Linux host that has both IPv6 and IPv4 enable. I can access the content served by that Apache from IPV4 only enabled computer. Can someone help me understand what’s happening, and how to verify this configuration on a Linux host (CentOS in […]

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Development System & Network

How to define CORS settings on root level (base level) in Nginx configuration file

I have this working Nginx configuration: location /static/ { # Uncomment the following line in production mode expires max; # Remove signature of the static files that is used to overcome the browser cache location ~ ^/static/version { rewrite ^/static/(version\d*/)?(.*)$ /static/$2 last; } location ~* \.(ico|jpg|jpeg|png|gif|svg|js|css|swf|eot|ttf|otf|woff|woff2|json)$ { add_header Cache-Control “public”; add_header Access-Control-Allow-Origin “https://store.my.domain”; if ($request_method […]