Posts Tagged ‘ip’

Check weather forecast from console (terminal) on GNU / Linux and FreeBSD howto

Friday, August 23rd, 2019

how to get weather forecast prognosis from command line text terminal / console on Linux and FreeBSD

Doing everything in Linux console / terminal is a question perhaps every Linux / BSD hacker wants to do as Graphical user interface and using web search or using Graphical Environment plugins is an unneded complexity + googling or duckduckgoing for weather to check your next vacation destination city has been more and more of a terrible experience (for me) as I'm not a big fan of using the OS in a GUI.
In that manner of thoughts, as a Linux console geek and hard core ASCII art fan. I was recently happy to find that  possible to check weather forecast in tty console or Linux terminal in a beautiful ascii art way easily through a Web wttr.in service – a web application weather forecast service that supports displaying the current and few days in future, weather forecast either in browser as a plain text or from the command line by simply accessing it with your favourite web access / transfer tool such as;
wget / curl or any of your favourite text browser elinks / lynx / w3m or if on *BSDs use fetch command.

 

Install Curl data transfer tool if it is not already


Wget is installed by default across most Linux distributions and fetch is present by default on BSDs, displaying it in text browser would perhaps be never used but if you decide to give it a try maybe try with elinks (to get colorful output), w3m and lynx will display a black and white results.

In case if you miss curl, install it:

On Debian distro

 

aptitude install -y curl


or Fedora

yum install -y curl


Of course to use wttr.in as it is Internet based Weather Forecast service the minimum you need to have is to have Internet connection to your Linux / BSD desktop computer.

Text based Weather Forecast Web App currently supports:

display the current weather as well as a 3-day weather forecast, split into morning, noon, evening and night

  • Temperature is displayed for morning, noon, evening and night (includes temperature range, wind speed and direction, viewing distance, precipitation amount and probability)
  • Provide results for Weather based on City / town / village location
  • Supports display of Moon Phases Forecast in calendar days
  • Supports multilingual names (Bulgarian Phonetic cyrillic / Russian and other exotic UTF-8 encodings such as Chineese and Japanese),  50+ languages are currently supported
  • Has ability for prognosis for hostname (domain) location based on an its IP GeoIP location on the Globe
  • Geographical locations / landmarks such as Lakes / Mountains etc. can be easily queried
  • Query results metrics could be configured, e.g. USCS units or EU and rest of world accepted ones (SI) metric
  • Displayed result could be either in ANSI (if from terminal / console / HTML if queried from browser or in PNG – if needed)

 

Where wttr.in could be useful ?

The best applications use, I can think of are for server (shell) / perl scripting automation purposes, it could be useful especially in TOO HOT, TOO, COLD, TOO WET location in Small and Middle sized Data Centers Green Energy (Sun Panel) Parks / Wind Energy situated Linux monitoring hosts to track possible problems of overheats or overcolding of servers due to abnormal excessive temperatures such as the ones we experienced this summer here All across in Europe or in too Cold DC locations such as heat locations Deserts in African Countries, Saudi Arabia or Chukotka or Siberia in Russia.
Other application is as a backup option to other normal Weather report services by PHP or Python scripts that fetch data, from multiple places.
Of course since this is a third party controlled service, the downtime is due to excessive connection requests, the service could get flooded and stopped working, but I guess for any Commercial use, wttr.in creator Igor Chubin would be happy to sell a specific crafted service for any end user candidates.


Here is few examples of the beautiful returned ASCII art formatted output of wttr.in.
 

1. Getting a three days Weather Forecast prognosis for city / town location

To get what is current weather in my current city of Living, Sofia Bulgaria just pass the city to the URL address

curl http://wttr.in/Sofia

text-console-wttr.in-Weather-forecast-Sofia-for-Linux

 

links http://wttr.in/Dobrich

 

curl-Linux-show--Dobrich-Weather-forecast-in-lynx-text-browser


Default links (Linux) www text browser produces ugly black and white

2. Displaying Weather forecast with wget

 

wget -O- -q http://wttr.in


getting-weather-forecast-on-linux-terminal-console-with-wget-command

If you're lazy you can even omit the http:// as wget will look for HyperText Transmission Protocol by itself

 

wget -O- -q wttr.in

 

3. Getting Forecast results for a Tourist Destination


Lets get the weather forecast for the popular tourist Bulgarian destination of the Seven Rila Lakes (near Rila Monastery), situated in the Rila Mountain BG.

 

curl http://wttr.in/Seven+Rila+Lakes

 

Console-terminal-Weather-forecast-Linux-Seven-Rila-Lakes

 

 

4. Display Forecast for a specific server IP


Displaying information on specific server IP address current situated in GeoIP database, of course could be not really true, as the IP could be just a Load Balancer a router that does NAT to some internal DMZ-ed location server, but anyways it is a cool feature.

Lets get information on what is the weather on Google Global's Public DNS server IP 8.8.8.8 so commonly used to guarantee a Windows and Linux Desktop client machines Internet connectivity.
 

curl wttr.in/@8.8.8.8

 

wttr.in-Linux-text--forecast-service-curl-screenshot Google Public DNS location weather forecast

5. Download PNG image picture from wttr.in service

 


Lets say you want to get a 3 days standard Weather forecast for the popular Black Sea Resort town in Bulgaria Pomorie (a beautiful sea city which has even a functioning 5 Monks Monastery Pomorie Monastery situated near sea coast)

 

curl http://wttr.in/Pomorie.png
 

 

–2019-08-22 20:15:51–  http://wttr.in/Pomorie.png
Resolving wttr.in (wttr.in)… 5.9.243.187
Connecting to wttr.in (wttr.in)|5.9.243.187|:80… connected.
HTTP request sent, awaiting response… 200 OK
Length: 42617 (42K) [image/png]
Saving to: ‘Pomorie.png’

Pomorie.png                                     100%[=======================================================================================================>]  41.62K  –.-KB/s    in 0.07s   

2019-08-22 20:15:52 (586 KB/s) – ‘Pomorie.png’ saved [42617/42617]

 

Note: The generated .png is again the ASCII art produced by a direct text fetch bug in pic format

 

6. Displaying Current Moon Phase


If you want to enjoy a text based Moon phase picture through wttr.in 🙂

wget -O- -q wttr.in/Moon


Display-current-Phase-of-Moon-in-terminal-console-Linux-wttr.in-service

You can also get a Moon Phase prognosis for a current future date or get a previous date phase

 

curl wttr.in/moon@2019-09-15

Full-Moon-Weather-forecast-text-console-reporting-via-wttr.in-on-Gnu_Linux


Full Moon Madness !! – Vampires are out beaware and Enjoy the ultra kewl ASCII Colorful Art 🙂
 

7. Getting help for wttr.in terminal Waether Forecast results

 

 

$ curl wttr.in/:help
Usage:

 

    $ curl wttr.in          # current location
    $ curl wttr.in/muc      # weather in the Munich airport

Supported location types:

    /paris                  # city name
    /~Eiffel+tower          # any location
    /Москва                 # Unicode name of any location in any language
    /muc                    # airport code (3 letters)
    /@stackoverflow.com     # domain name
    /94107                  # area codes
    /-78.46,106.79          # GPS coordinates

Special locations:

    /moon                   # Moon phase (add ,+US or ,+France for these cities)
    /moon@2016-10-25        # Moon phase for the date (@2016-10-25)

Units:

    m                       # metric (SI) (used by default everywhere except US)
    u                       # USCS (used by default in US)
    M                       # show wind speed in m/s

View options:

    0                       # only current weather
    1                       # current weather + 1 day
    2                       # current weather + 2 days
    A                       # ignore User-Agent and force ANSI output format (terminal)
    F                       # do not show the "Follow" line
    n                       # narrow version (only day and night)
    q                       # quiet version (no "Weather report" text)
    Q                       # superquiet version (no "Weather report", no city name)
    T                       # switch terminal sequences off (no colors)

PNG options:

    /paris.png              # generate a PNG file
    p                       # add frame around the output
    t                       # transparency 150
    transparency=…        # transparency from 0 to 255 (255 = not transparent)

Options can be combined:

    /Paris?0pq
    /Paris?0pq&lang=fr
    /Paris_0pq.png          # in PNG the file mode are specified after _
    /Rome_0pq_lang=it.png   # long options are separated with underscore

Localization:

    $ curl fr.wttr.in/Paris
    $ curl wttr.in/paris?lang=fr
    $ curl -H "Accept-Language: fr" wttr.in/paris

Supported languages:

    af da de el et fr fa hu id it nb nl pl pt-br ro ru tr uk vi (supported)
    az be bg bs ca cy cs eo es fi ga hi hr hy is ja jv ka kk ko ky lt lv mk ml nl fy nn pt pt-br sk sl sr sr-lat sv sw th te uz zh zu he (in progress)

Special URLs:

    /:help                  # show this page
    /:bash.function         # show recommended bash function wttr()
    /:translation           # show the information about the translators

 


 

 

8. Comparing two cities weather from command line

 


One useful use of wttr.in if you plan to travel from Location city A to Location city B is to compare the temperatures with a simple bash one liner script:

 

 

 

diff -Naur <(curl -s http://wttr.in/Sofia ) <(curl -s http://wttr.in/Beograd )

 

 

9. Using ansiweather command to get Weather Temperature / Wind / Humidity in one line beuatiful text

 


If you go and install answeather Linux package

 

apt-get install –yes ansiweather


You will get a shell script wrapper with ANSI colors and Unicode symbols support. Weather data comes from OpenWeatherMap, this is useful if wttr.in is not working due to some URL malfunction (due to service is DoS-ed) etc.

 

ansiweather -l Atina

 

ansiweather-Atina-weather-forecast-result-linux-text-console

Lets use ansiweather to print the weather prognosis for upcoming 5 days for near port of Burgas, BG
 

ansiweather -F -l Burgas

ansiweather-print-weather-forecast-prognosis-for-5-days-in-Linux-text-terminal

 

10. Get all Weather current forecast for each Capital in the world


You can download and use this simple plain text file list of All Country Capitals in the World (country-capitals-all-world.txt) with ansiweather and a bash loop to get displayed each and every current day Weather Forecast in the World, here is how:

 

while read line; do ansiweather -l $line; sleep 3; done < country-capitals-all-world.txt


ansiweather-all-countires-capitals-result

As you can see some of the very exotic third world capitals does not return data so 'ERROR: Cannot fetch weather data' is returned.


You can also substitute ansiweather with curl wttr.in/$line to do get the beautiful ASCII art 3 days weather forecast via wttr.in

 

while read line; do curl http://wttr.in/$line; sleep 3; done < country-capitals-all-world.txt


I'll be happy to know other nice ASCII Art supporting Web service to enjoy from text terminal on Linux (nomatter useful or) just funny joyful prank maniacal pranks such as Watching text ASCII version remake of Star Wars Classic Movie by simply telnetting to towel.blinkenlights.nl (if you haven't so just telnet and enjoy the streamed ASCIIs ! 🙂

 

telnet towel.blinkenlights.nl

 

watch-star-wars-ascii-art-version-remake-online-with-telnet-on-linux-console-terminal

 

Talking about fun and ASCII, its worthy to mention hollywood Linux package

hipo@jeremiah:~/Desktop$ apt-cache show hollywood|grep -i desc -A 3
Description-en: fill your console with Hollywood melodrama technobabble
 This utility will split your console into a multiple panes of genuine
 technobabble, perfectly suitable for any Hollywood geek melodrama.
 It is particularly suitable on any number of computer consoles in the


Description-md5: 768f44c76220ea2b35f855ea34c8bc35
Homepage: http://launchpad.net/hollywood
Section: games
Priority: optional


Once installed on Debian with:

aptitude install -y hollywood

You can get in a rapid manner plenty of tmux (screen like – virtual console emulator) split screen statistics about your notebook / workstation / server CPU usage, mlocate.db status, info about plugged in machine voltage, Speedometer (statistics about Network bandwidth usage), System load avarage (CPU Count, Memory Utilization) and some other random info coming out of dmesg kernel log and more. The information displayed in splitted windows changes rapidly and (assuming you run it at home Desktop with a soundblaster) and not remotely, a james bond Agent 007 soundtrack is played on the back, that brings up one's adrenaline and makes it look even cooler.

hollywood-melodrama-technobubble-split-console-multiple-panes-for-genuine-technobubble

To give you an idea what to expect, here is shot of /usr/games/hollywood (the program start binary location) on Debian GNU / Linux running, Enjoy! 🙂
 

Create SSH Tunnel to MySQL server to access remote filtered MySQL port 3306 host through localhost port 3308

Friday, February 27th, 2015

create_ssh_tunnel_to-mysql_server-to-access-remote-filtered-mysql-on-port-3306-secure_ssh_traffic
On our Debian / CentOS / Ubuntu Linux and Windows servers we're running multiple MySQL servers and our customers sometimes need to access this servers.
This is usually problem because MySQL Db  servers are running in a DMZ Zone with a strong firewall and besides that for security reasons SQLs are configured to only listen for connections coming from localhost, I mean in config files across our Debian Linux servers and CentOS / RHEL Linux machines the /etc/mysql/my.cnf and /etc/my.cnf the setting for bind-address is 127.0.0.1:
 

[root@centos ~]# grep -i bind-address /etc/my.cnf 
bind-address            = 127.0.0.1
##bind-address  = 0.0.0.0


For source code developers which are accessing development SQL servers only through a VPN secured DMZ Network there are few MySQL servers witha allowed access remotely from all hosts, e.g. on those I have configured:
 

[root@ubuntu-dev ~]# grep -i bind-address /etc/my.cnf 

bind-address  = 0.0.0.0


However though clients insisted to have remote access to their MySQL Databases but since this is pretty unsecure, we decided not to configure MySQLs to listen to all available IP addresses / network interfaces. 
MySQl acess is allowed only through PhpMyAdmin accessible via Cleint's Web interface which on some servers is CPanel  and on other Kloxo (This is open source CPanel like very nice webhosting platform).

For some stubborn clients which wanted to have a mysql CLI and MySQL Desktop clients access to be able to easily analyze their databases with Desktop clients such as MySQL WorkBench there is a "hackers" like work around to create and use a MySQL Tunnel to SQL server from their local Windows PCs using standard OpenSSH Linux Client from Cygwin,  MobaXterm which already comes with the SSH client pre-installed and has easy GUI interface to create SSH tunnels or eventually use Putty's Plink (Command Line Interface) to create the tunnel

Anyways the preferred and recommended (easiest) way to achieve a tunnel between MySQL and local PC (nomatter whether Windows or Linux client system) is to use standard ssh client and below command:
 

ssh -o ServerAliveInterval=10 -M -T -M -N -L 3308:localhost:3306 your-server.your-domain.com


By default SSH tunnel will keep opened for 3 minutes and if not used it will automatically close to get around this issue, you might want to raise it to (lets say 15 minutes). To do so in home directory user has to add in:
 

~/.ssh/config

ServerAliveInterval 15
ServerAliveCountMax 4


Note that sometimes it is possible ven though ssh tunnel timeout value is raised to not take affect if there is some NAT (Network Adress Translation) with low timeout setting on a firewall level. If you face constant SSH Tunnel timeouts you can use below bash few lines code to auto-respawn SSH tunnel connection (for Windows users use MobaXterm or install in advance bash shell cygwin package):
 

while true
do
 
ssh -o ServerAliveInterval=10 -M -T -M -N -L 3308:localhost:3306 your-server.your-domain.com
  sleep 15
done


Below is MySQLBench screenshot connected through server where this blog is located after establishing ssh tunnel to remote mysql server on port 3308 on localhost

mysql-workbench-database-analysis-and-management-gui-tool-convenient-for-data-migratin-and-queries-screenshot-

There is also another alternative way to access remote firewall filtered mysql servers without running complex commands to Run a tunnel which we recommend for clients (sql developers / sql designers) by using HeidiSQL (which is a useful tool for webdevelopers who has to deal with MySQL and MSSQL hosted Dbs).

heidisql-show-host_processlist-screenshot

To connect to remote MySQL server through a Tunnel using Heidi:

mysql_connection_configuration-heidi-mysql-gui-connect-tool

 

In the ‘Settings’ tab

1. In the dropdown list of ‘Network type’, please select SSH tunnel

2. Hostname/IP: localhost (even you are connecting remotely)

3. Username & Password: your mysql user and password

Next, in the tab SSH Tunnel:

1. specify plink.exe or you need to download it and specify where it’s located

2. Host + port: the remote IP of your SSH server(should be MySQL server as well), port 22 if you don’t change anything

3. Username & password: SSH username (not MySQL user)

 

heidi-connection_ssh_tunnel_configuration-heidi-sql-tool-screenshot
 

Fix to “413 Request Entity Too Large” error in Nginx webserver and what causes it

Friday, November 14th, 2014

nginx_413_request_entity_too_large-fix

If you administer NGINX caching server serving static files content and redirecting some requests to Apache and you end up with errors when uploading big files (using HTTP PUT method), even though in Apache's PHP  upload_max_filesize is set to relatively high number upload_max_filesize = 60M.

Here is what happens during hand shake of web-browser -> server interaction 'till status is returned:
 

Web browser or Webcrawler robot goes through the following phases while talking to Web server:

 

1. Obtain an IP address from the IP name of the site (base on site URL without the leading 'http://'). 
This is provided by domain name servers (DNSs) configured for PC.
2. Open an IP socket connection to that IP address.
3. Write an HTTP data stream through that socket
(4) Receive an HTTP data stream back from the Web server in response. 
This data stream contains status codes whose values are determined by the HTTP protocol
whether successful. 

 

In the case the is recognized and reported to client 'web browser', causing the error.

The fix is to also increase max file upload limit in NGINX this is done via:
 
client_max_body_size variable in /usr/local/nginx/nginx.conf (or /etc/nginx/nginx.conf whether Nginx is installed from package).
Here is extract from nginx.conf

http {
    include       mime.types;
    default_type  application/octet-stream;
    sendfile        on;
    keepalive_timeout  65;

 

    server {
        client_max_body_size 60M;
        listen       80;
        server_name  localhost;

        # Main location
        location / {
            proxy_pass         http://127.0.0.1:8000/;
        }
    }
}


To make new configuration active Restart Nginx:

/etc/init.d/nginx restart

Create local network between virtual machines in Virtualbox VM – Add local LAN between Linux Virtual Machines

Wednesday, June 11th, 2014

add-virtualbox-virtual-machines-inside-local-network-create-internal-LAN-local-net-linux-windows

I want to do test MySQL Cluster following MySQL Cluster Install Guide for that purpose, I've installed 2 version of CentOS 6.5 inside Virtualbox and I wanted to make the 2 Linux hosts reachable inside a local LAN network, I consulted some colleagues who adviced me to configure two Linux hosts to use Bridget Adapter Virtualbox networking (Network configuration in Virtualbox is done on a Virtual Machine basis from):
 

Devices -> Network Settings

(Attached to: Bridged Adapter)

Note!: that by default Cable Connected (tick) is not selected so when imposing changes on Network – tick should be set)
After Specifying Attached to be Bridged Adapter to make CentOS linux refresh network settings run in gnome-terminal:

[root@centos ~]# dhclient eth0

However CentOS failed to grab itself DHCP IP address.
Thus I tried to assign manually IP addresses with ifconfig, hoping that at least this would work, e.g.:

on CentOS VM 1:

/sbin/ifconfig eth0 192.168.10.1 netmask 255.255.255.0

on CentOS VM 2:

/sbin/ifconfig eth1 192.168.10.2 netmask 255.255.255.0

To test whether there is connection between the 2 VM hosts tried ping-ing 192.168.10.2 (from 192.168.10.1) and tested with telnet if I can access remotely SSH (protocol), from CentOS VM2 1 to CentOS VM2 and vice versa, i.e.:

[root@centos ~]# telnet 192.168.10.2 22

 

Trying 192.168.10.2…
telnet: connect to address 192.168.10.2: No route to host

Then after checking other options and already knowing by using VBox NAT network option I had access to the internet, I tried to attach a standard local IP addresses to both Linux-es as Virtual interfaces (e.g eth0:1), .e.g:

On Linux VM 1:

/sbin/ifconfig eth0:0 192.168.10.1 netmask 255.255.255.0

On Linux VM 2:

/sbin/ifconfig eth1:0 192.168.10.2 netmask 255.255.255.0

Then to test again used telnet

[root@centos ~]# telnet 192.168.10.2 22

Then I found Virtualbox has a special Internal Networking support

to choose in Attached to drop down menu. According to Internal Networking Virtualbox instructions to put two Virtual Machine hosts inside an Internal network they should be both set in Internal network with identical name.
P. S. It is explicitly stated that using Internal Network will enable access between Guest Virtual Machines OS, but hosts will not have access to the Internet (which in my case doesn't really mattered as I needed the two Linux VMs just as a testbed)

virtualbox-create-internal-local-network-between-guest-host-Linux-Windows1

I tried this option but it doesn't work for me for some reason, after some time of research online on how to create local LAN network between 2 Virtual Machines luckily I decided to test all available Virtualbox Networking choices and noticed Host-only adapter.

Selecting Host-only Adapter and using terminal to re-fetch IP address over dhcp:

virtualbox-connect-in-local-lan-network-linux-and-windows-servers-hosts-only-adapter

On CentOS VM1

dhclient eht0

On CentOS VM2

dhclient eth1

assigned me two adjoining IPs – (192.168.56.101 and 192.168.56.102).

Connection between the 2 IPs 192.168.56.101 and 192.168.56.102 on TCP and UDP and ICMP protocol works, now all left is to install MySQL cluster on both nodes.

 

Adding Listing and Deleting SSL Certificates in keystore Tomcat Application server / What is keystore

Thursday, December 5th, 2013

Apache Tomcat keystore delete import list logo

 I work on ongoing project where Tomtat Application servers configured to run Clustered located behind Apache with mod_proxy configured to use ReverseProxy are used. One of customers which required a java application deployment experienced issues with application's capability to connect to SAP database.

After some investigation I figured out, the application is unable to connect to the SAP db server becuse remote host webserver running some SAP related stuff was not connecting due to expired certificate in Tomcat Keystore known also as JKS / Java Keystore– (.keystore) – which is a file containing multiple remote hosts imported certificates.

The best and shortest definition of keystore is:

Keystore entry = private + public key pair = identified by an alias

The keystore protects each private key with its individual password, and also protects the integrity of the entire keystore with a (possibly different) password.

Managing Java imported certificates later used by Tomcat is done with a command line tool part of JDK (Java Development Kit) called keystore. Keystore is usually located under /opt/java/jdk/bin/keytool. My Java VM is installed in /opt/ anyways usual location of keytool is $JAVA_HOME/bin/

Keytool has capabilities to create / modify / delete or import new SSL certificates and then Java applications can access remote applications which requires Secure Socket Layer handshake . Each certificate kept in .keystore file (usually located somewhere under Tomcat web app server directory tree), lets say – /opt/tomcat/current/conf/.keystore

1. List current existing imported SSL certificates into Java's Virtual Machine

tomcat-server:~# /opt/java/jdk/bin/keytool -list -keystore /opt/tomcat/current/conf/.keystore
password:
Command returns output similar to;

Entry type: trustedCertEntry

Owner: CN=www.yourhost.com, OU=MEMBER OF E.ON GROUP, OU=DEVICES, O=E.GP AG, C=DE
Issuer: CN=E.ON Internal Devices Sub CA V2, OU=CA, O=EGP, C=DE
Serial number: 67460001001c6aa51fd25c0e8320
Valid from: Mon Dec 27 07:05:33 GMT 2010 until: Fri Dec 27 07:05:22 GMT 2013
Certificate fingerprints:
         MD5:  D1:AA:D5:A9:A3:D2:95:28:F1:79:57:25:D3:6A:16:5E
         SHA1: 73:CE:ED:EC:CA:18:E4:E4:2E:AA:25:58:E0:2B:E4:D4:E7:6E:AD:BF
         Signature algorithm name: SHA1withRSA
         Version: 3

Extensions:

#1: ObjectId: 2.5.29.15 Criticality=true
KeyUsage [
  DigitalSignature
  Key_Encipherment
  Key_Agreement
]

#2: ObjectId: 2.5.29.19 Criticality=true
BasicConstraints:[
  CA:false
  PathLen: undefined
]

#3: ObjectId: 1.3.6.1.5.5.7.1.1 Criticality=false
AuthorityInfoAccess [
  [
   accessMethod: 1.3.6.1.5.5.7.48.2
   accessLocation: URIName: http://yourhost.com/cacerts/egp_internal_devices_sub_ca_v2.crt,
   accessMethod: 1.3.6.1.5.5.7.48.2
   accessLocation: URIName: http://www.yourhost1.com/certservices/cacerts/egp_internal_devices_sub_ca_v2.crt]
]

#4: ObjectId: 2.5.29.14 Criticality=false
SubjectKeyIdentifier [
KeyIdentifier [
0000: D3 52 C7 63 0F 98 BF 6E   FE 00 56 5C DF 35 62 22  .R.c…n..V\.5b"
0010: F2 B9 5B 8F                                        ..[.
]

Note that password that will be promtped has is by default changeit (in case if you don't have explicitly changed it from Tomcat's default config server.xml).

2. Delete Old expired SSL host Certificate from Java Keystore
It is good practice to always make backup of old .keystore before modifying, so I ran:

tomcat-server:~# cp -rpf /opt/tomcat/current/conf/.keystore /opt/tomcat/current/conf/.keystore-05-12-2013

In my case first I had to delete old expired SSL certificate with:

tomcat-server:~# /opt/java/jdk/bin/keytool -delete -alias "your-hostname" -v -keystore /opt/tomcat/current/conf/.keystore

Then to check certificate is no longer existent in keystore chain;
tomcat-server:~# /opt/java/jdk/bin/keytool -list -keystore /opt/tomcat/current/conf/.keystore

-keystore – option is obligitory it does specify where keystore file is located
-list – does list the certificate
-v – stands for verbose

 

3. Finally to import new SSL from already expored via a browser url in keystore

tomcat-server:~# /opt/java/jdk/bin/keytool -importcert -file /tmp/your-hostname.cer -alias your-hostname.com -keystore /opt/tomcat/current/conf/.keystore

More complete information on how to deal with keystore is available from Apache Tomcat's SSL Howto – a must read documentation for anyone managing Tomcat.

How rescue unbootable Windows PC, Windows files through files Network copy to remote server shared Folder using Hirens Boot CD

Saturday, November 12th, 2011

hirens-boot-cd-logo-how-to-rescue-unbootable-pc-with-hirens-bootcd
I'm rescuing some files from one unbootable Windows XP using a livecd with Hirens Boot CD 13

In order to rescue the three NTFS Windows partitions files, I mounted them after booting a Mini Linux from Hirens Boot CD.

Mounting NTFS using Hirens BootCD went quite smoothly to mount the 3 partitions I used cmds:

# mount /dev/sda1 /mnt/sda1
# mount /dev/sda2 /mnt/sda2
# mount /dev/sdb1 /mnt/sdb1

After the three NTFS file partitions are mounted I used smbclient to list all the available Network Shares on the remote Network Samba Shares Server which by the way possessed the NETBIOS name of SERVER 😉

# smbclient -L //SERVER/
Enter root's password:
Domain=[SERVER] OS=[Windows 7 Ultimate 7600] Server=[Windows 7 Ultimate 6.1]

Sharename Type Comment
——— —- ——-
!!!MUSIC Disk
ADMIN$ Disk Remote Admin
C$ Disk Default share
Canon Inkjet S9000 (Copy 2) Printer Canon Inkjet S9000 (Copy 2)
D$ Disk Default share
Domain=[SERVER] OS=[Windows 7 Ultimate 7600] Server=[Windows 7 Ultimate 6.1]
Server Comment
——— ——-
Workgroup Master
——— ——-

Further on to mount the //SERVER/D network samba drive – (the location where I wanted to transfer the files from the above 3 mounted partitions):

# mkdir /mnt/D
# mount //192.168.0.100/D /mnt/D
#

Where the IP 192.168.0.100 is actually the local network IP address of the //SERVER win smb machine.

Afterwards I used mc to copy all the files I needed to rescue from all the 3 above mentioned win partitions to the mounted //SERVER/D
 

Few websites to check how anonymous you are on the Internet

Monday, April 11th, 2011

A friend of mine has recommended, few websites which are quite useful in checking what kind of information a remote website could possibly retrieve about your system. I’ve found quite useful as they expose the high level of browser security there is nowdays even on a Linux based systems.
I’ve been stunned that so many information about my Linux desktop could be mined even when I use my browser through a tor network.

Here are the websites you might also like to check and possibly afterwards improve your Browser security:

http://anon.inf.tu-dresden.de/help/jap_help/en/help/security_test.html
http://www.proxy-list.org/en/show-my-ip.php
http://leader.ru/secure/who.html

I was rather shocked that some information that could be retrieved on my Linux host could even reveal fundamental details about my Linux Desktop like a version of my currently running Linux kernel!

In the past I’ve blogged an article which is quite related to the topic of Internet Anonimity and Browser security

You might consider checking my old article How to improve your web browser security and better secure your personal identity privacy on the internet here
I will take some steps further to look on how to further decrease the amount of OS sensitive data revealed by my browser and will further blog when I find ways for better ways to anonimize my surging.

Configuring varnishd to log client IP addresses in Apache log

Wednesday, February 3rd, 2010

I realized today, that because my varnish serves incoming connections to my
apache port a really annoying problem appears.
I mean in my httpd-access.log everytime I get some visit from the Net, the
incoming IP address logged in the Apache log is originating from 127.0.0.0
e.g. (localhost). That’s a real pain in the ass, cause it prevents me from
adequately tracking visitors countries and their networks.
Therefore to fix that and configure varnish to always log my original visitors
IPs to the apache log I had to follow instructions described in.
How can I log the client IP address on the backend? in the Varnish Cache FAQ

Here I will include step by step explanation how I practically implemented
the solution as explained in the FAQ on my FreeBSD.

First I had edit:
/usr/local/etc/varnish/default.vcl
The following is currently my default.vlc file content:
backend default {.host = "127.0.0.1";.port = "8080";}sub vcl_recv {# Add a unique header containing the client addressremove req.http.X-Forwarded-For;set req.http.X-Forwarded-For = client.ip;# [...]}
Next I had to add:
varnishd_config="/usr/local/etc/varnish/default.vcl"
to my /etc/rc.conf
And then modify my:
/usr/local/etc/apache2/httpd.conf
and include:
LogFormat "%{X-Forwarded-For}i %l %u %t "%r" %>s %b "%{Referer}i" "%{User-Agent}i"" varnishcombined
as well as:
CustomLog /var/log/httpd-access.log varnishcombined
to all my VirtualHosts.

Finally it’s required to restart both varnishd and apache
pcfreak# /usr/local/etc/rc.d/varnishd restartpcfreak# /usr/local/etc/rc.d/apache2 restart

That’s all folks!