Networking
allthegoodnamesaretaken
by dervish on Jun.01, 2016, under Networking
$ whois allthegoodnamesaretaken.com [Querying whois.verisign-grs.com] [Redirected to whois.godaddy.com] [Querying whois.godaddy.com] [whois.godaddy.com] Domain Name: allthegoodnamesaretaken.com Registry Domain ID: 1961304002_DOMAIN_COM-VRSN Registrar WHOIS Server: whois.godaddy.com Registrar URL: http://www.godaddy.com Update Date: 2015-09-17T20:10:42Z Creation Date: 2015-09-17T20:10:42Z
Airport Extreme IPv6 Relay Error
by dervish on Jun.07, 2014, under Apple, Networking
Unless you are currently using IPv6, be sure that your AirPort Extreme is configured to use the “Link-local only” setting for IPv6.
You can set this using the AirPort Utility:
AirPort Utility > Select the Extreme > Edit
Internet > Internet Options > Configure IPv6: Link-local only
On your Mac:
System Preferences > Network > Wi-Fi > Advanced
TCP/IP > Configure IPv6: Link-local only
How-To: Get External IP Address from the Command Line
by dervish on Sep.09, 2013, under Networking
Commands:
curl ifconfig.me
or
dig +short myip.opendns.com @resolver1.opendns.com
Examples:
dervish@mint15 ~ $ curl ifconfig.me
88.198.110.185
dervish@mint15 ~ $ dig +short myip.opendns.com @resolver1.opendns.com
64.130.245.84
NOTE: The curl command will return the proxy server address if one is being used.
EMAIL Port Reference Table
by dervish on May.11, 2012, under Networking
|
Incoming Server Type: |
Port: |
|
POP3 |
110 |
|
IMAP |
143 |
|
POP3 with SSL |
995 |
|
IMAP with SSL |
993 |
|
Outgoing Server Type: |
Port: |
|
SMTP |
25, 587, 8025, or 2525 |
|
SMTP with SSL |
465 |
Which application is using a Linux network port?
by dervish on Feb.01, 2011, under Linux, Networking
Use: netstat -tlnp | grep port
Example using netstat:
[root@trioxin2 jhopkins]# netstat -tlnp | grep 80
tcp 0 0 :::80 :::* LISTEN 4246/httpd
The above example reveals that the httpd process with a PID of 4246 is running on port 80.
To verify, you can run the ps command and grep for the application name or PID:
[root@trioxin2 jhopkins]# ps -ef | grep 4246
root 4246 1 0 13:35 ? 00:00:00 /usr/sbin/httpd
apache 4249 4246 0 13:35 ? 00:00:00 /usr/sbin/httpd
apache 4250 4246 0 13:35 ? 00:00:00 /usr/sbin/httpd
apache 4251 4246 0 13:35 ? 00:00:00 /usr/sbin/httpd
apache 4252 4246 0 13:35 ? 00:00:00 /usr/sbin/httpd
apache 4253 4246 0 13:35 ? 00:00:00 /usr/sbin/httpd
apache 4254 4246 0 13:35 ? 00:00:00 /usr/sbin/httpd
apache 4255 4246 0 13:35 ? 00:00:00 /usr/sbin/httpd
apache 4256 4246 0 13:35 ? 00:00:00 /usr/sbin/httpd
Example using fuser:
# fuser 80/tcp
80/tcp: 3130 7057 11956 11957 11958 26771 26801 30170 32433 32434 32766
# ps -ef | grep 3130
root 3130 1 0 Mar02 ? 00:01:19 /usr/sbin/apache2 -k start
www-data 7057 3130 0 Apr01 ? 00:01:18 /usr/sbin/apache2 -k start
www-data 11956 3130 0 Apr04 ? 00:00:23 /usr/sbin/apache2 -k start
www-data 11957 3130 0 Apr04 ? 00:00:38 /usr/sbin/apache2 -k start
www-data 11958 3130 0 Apr04 ? 00:00:42 /usr/sbin/apache2 -k start
www-data 26771 3130 0 Apr03 ? 00:00:54 /usr/sbin/apache2 -k start
www-data 26801 3130 0 Apr03 ? 00:00:50 /usr/sbin/apache2 -k start
…
