Creating bridge on CentOS.

brctl addbr br0
brctl addif enp0s8

brctl delif enp0s8

ip link set br0 up
ifconfig br0 0.0.0.0 0.0.0.0 up

Setting up static IPs from same subnet through one gateway?

1. Enabled ARP filtering:

# sysctl -w net.ipv4.conf.all.arp_filter=1
# echo "net.ipv4.conf.all.arp_filter = 1" >> /etc/sysctl.conf

2. Configure /etc/network/interfaces as following:

# The loopback network interface
auto lo
iface lo inet loopback

auto eth0
iface eth0 inet static
   address 7.7.7.4
   network 7.7.7.0
   netmask 255.255.255.0
   broadcast 7.7.7.255
   up ip route add 7.7.7.0/24 dev eth0 src 7.7.7.4 table eth0table
   up ip route add default via 7.7.7.1 dev eth0 table eth0table
   up ip rule add from 7.7.7.4 table eth0table
   up ip route add 7.7.7.0/24 dev eth0 src 7.7.7.4

auto eth1
iface eth1 inet static
   address 7.7.7.5
   network 7.7.7.0
   netmask 255.255.255.0
   broadcast 7.7.7.255
   up ip route add 7.7.7.0/24 dev eth1 src 7.7.7.5 table eth1table
   up ip route add default via 7.7.7.1 dev eth1 table eth1table
   up ip rule add from 7.7.7.5 table eth1table
   up ip route add default via 7.7.7.1 dev eth1
   up ip route add 7.7.7.0/24 dev eth1 src 7.7.7.5

Add the following two lines to /etc/iproute2/rt_tables

10 eth0table
20 eth1table

The following is also relevant:

A common configuration is the following, in which there are two providers that connect a local network (or even a single machine) to the big Internet.

                                                                 ________
                                          +------------+        /
                                          |            |       |
                            +-------------+ Provider 1 +-------
        __                  |             |            |     /
    ___/  \_         +------+-------+     +------------+    |
  _/        \__      |     if1      |                      /
 /             \     |              |                      |
| Local network -----+ Linux router |                      |     Internet
 \_           __/    |              |                      |
   \__     __/       |     if2      |                      \
      \___/          +------+-------+     +------------+    |
                            |             |            |     \
                            +-------------+ Provider 2 +-------
                                          |            |       |
                                          +------------+        \________

There are usually two questions given this setup.

4.2.1. Split access

The first is how to route answers to packets coming in over a particular provider, say Provider 1, back out again over that same provider.
Let us first set some symbolical names. Let $IF1 be the name of the first interface (if1 in the picture above) and $IF2 the name of the second interface. Then let $IP1 be the IP address associated with $IF1 and $IP2 the IP address associated with $IF2. Next, let $P1 be the IP address of the gateway at Provider 1, and $P2 the IP address of the gateway at provider 2. Finally, let $P1_NET be the IP network $P1 is in, and $P2_NET the IP network $P2 is in.
One creates two additional routing tables, say T1 and T2. These are added in /etc/iproute2/rt_tables. Then you set up routing in these tables as follows:

   ip route add $P1_NET dev $IF1 src $IP1 table T1
   ip route add default via $P1 table T1
   ip route add $P2_NET dev $IF2 src $IP2 table T2
   ip route add default via $P2 table T2
 

Nothing spectacular, just build a route to the gateway and build a default route via that gateway, as you would do in the case of a single upstream provider, but put the routes in a separate table per provider. Note that the network route suffices, as it tells you how to find any host in that network, which includes the gateway, as specified above. Next you set up the main routing table. It is a good idea to route things to the direct neighbour through the interface connected to that neighbour. Note the `src' arguments, they make sure the right outgoing IP address is chosen.

     ip route add $P1_NET dev $IF1 src $IP1
     ip route add $P2_NET dev $IF2 src $IP2
   

Then, your preference for default route:

     ip route add default via $P1
   

Next, you set up the routing rules. These actually choose what routing table to route with. You want to make sure that you route out a given interface if you already have the corresponding source address:

     ip rule add from $IP1 table T1
     ip rule add from $IP2 table T2
   

This set of commands makes sure all answers to traffic coming in on a particular interface get answered from that interface.

Reader Rod Roark notes: 'If $P0_NET is the local network and $IF0 is its interface, the following additional entries are desirable: ip route add $P0_NET dev $IF0 table T1 ip route add $P2_NET dev $IF2 table T1 ip route add 127.0.0.0/8 dev lo table T1 ip route add $P0_NET dev $IF0 table T2 ip route add $P1_NET dev $IF1 table T2 ip route add 127.0.0.0/8 dev lo table T2 '

Now, this is just the very basic setup. It will work for all processes running on the router itself, and for the local network, if it is masqueraded. If it is not, then you either have IP space from both providers or you are going to want to masquerade to one of the two providers. In both cases you will want to add rules selecting which provider to route out from based on the IP address of the machine in the local network.

4.2.2. Load balancing

The second question is how to balance traffic going out over the two providers. This is actually not hard if you already have set up split access as above.
Instead of choosing one of the two providers as your default route, you now set up the default route to be a multipath route. In the default kernel this will balance routes over the two providers. It is done as follows (once more building on the example in the section on split-access):

     ip route add default scope global nexthop via $P1 dev $IF1 weight 1 \
     nexthop via $P2 dev $IF2 weight 1
   

This will balance the routes over both providers. The weight parameters can be tweaked to favor one provider over the other. Note that balancing will not be perfect, as it is route based, and routes are cached. This means that routes to often-used sites will always be over the same provider.
Furthermore, if you really want to do this, you probably also want to look at Julian Anastasov's patches at http://www.ssi.bg/~ja/#routes , Julian's route patch page. They will make things nicer to work with.

Open malicious websites safely!

=> Install Links:

1. "Private Tab": https://addons.mozilla.org/en-US/firefox/addon/private-tab
2. "No-Script": https://addons.mozilla.org/en-US/firefox/addon/noscript 

In the following screenshot you can see "No-Script" blocked JavaScript!

Now this is where I have landed following that Rouge Link. As Most of the malicious scripts were blocked by "No-Script" this is what is being displayed to me:

Prerouting and Post Routing

NAT table is consulted when a packet that creates a new connection is encountered. It consists of three built-ins:

PREROUTING (for altering packets as soon as they come in),

OUTPUT (for altering locally-generated packets before routing), and 

POSTROUTING (for altering packets as they are about to go out).

PREROUTING - DNAT for incoming packets

OUTPUT - DNAT for outgoing local packets

POSTROUTING - SNAT for outgoing local/forwarded packets

Configuring Inventum Software NAS

----------------------------------------------------------
=>Inventum Login:
User: root
Password: inventumadmin
----------------------------------------------------------
=> Initial Setup
main->show
----------------------------------------------------------
=>Displaying the Connected Interfaces:
main->diag
ifconfig
=>Verify: BROADCAST RUNNING MULTICAST
=>To exit from DIAG: quit
=>List all PCI devices:
main->config->pci
----------------------------------------------------------
=> To load Drivers:
main->config
help
list drivers
=>Look at the driver name. For ex: e1000
=>Press Enter to continue till the list ends.
load e1000
=>To display what is already loaded:
loaded
=>To unload/uninstall:
unload e1000
save
=>To reboot the NAS:
main
reset/restart
----------------------------------------------------------
=>Change Default Inventum Password:
main->config
change user root password 145236
----------------------------------------------------------
=> List all Users:
main->config
list users
=> Delete User:
del user soham
=>Add User:
add user soham password 145236789 role mgr
----------------------------------------------------------
=>Set IPs to Interfaces:
main->interface
set eth0 10.11.12.2 mask 255.255.255.240
set eth1 10.11.12.1 mask 255.255.255.240
----------------------------------------------------------
=>Inventum Set Default Route/Gateway:
main->route
set default 10.11.12.1

>Display All Routes:
main->diag
route
----------------------------------------------------------
=> Setting up DNS:
main->dns->show
add ns 8.8.8.8
del ns 208.67.222.222
----------------------------------------------------------
=>Set SNAT
main->snat
help
----------------------------------------------------------
=> Set Policy Url:
main->url
help
set policy url 203.12.122.122
----------------------------------------------------------
=>Set Firewall:
main->firewall
show

dd allow from 203.12.122.122 to any protocol any
add allow from any to 203.12.122.122 protocol any

dd allow from any to any protocol tcp/80/
add allow from any to any protocol tcp//80
----------------------------------------------------------
=> Show running Processes:
main->diag-> ?
ps
=>Check NAS Uptime:
uptime
=> Free RAM:
free

cpdump
iptraf
netstat
arp
clear-ssh-identity
----------------------------------------------------------
=>To do nslookup:
main
nslookup
----------------------------------------------------------
=>Enabling Authsrv service:
main->authsrv
show

ervice on
set port eth1 wan
set port eth0 lan
qos on
----------------------------------------------------------
=> Enable Packet Logging:
main->plog
set logging on
format extended
reload

et logging to 10.11.12.5 8080
----------------------------------------------------------
=> Enable Syslog Logging:
set logging on
set logging to 10.11.12.5 8080
set log level err
reload
----------------------------------------------------------

Best animes in Comedy+Romance Genre. An ultimate list of old + new best anime series.

Best animes in Comedy+Romance Genre: 

1. Tsukuyomi: Moon Phase
=> Rating: 10/8

 2. Hyakka Ryouran: Samurai Girls and
Hyakka Ryouran (Season 2): Samurai Bride 
=> Rating: 10/7

3. Aria the Scarlet Ammo 
=> Rating: 10/8



















4. Infinite Stratos Season 1 and Season 2
=> Rating: 10/9

**5. Ah! My Goddess Season 1 and Season 2 + OVAs + Movie
=> Rating: 10/10

**6.  Ai Yori Aoshi and Ai Yori Aoshi: Enishi
=> Rating: 10/10
 

**7.  Campione
=> Rating: 10/10

8. Date A Live
=> Rating: 10/9 

**9. Hataraku Maou-sama!
=>Rating: 10/10

10. Escaflowne
=>Rating:10/9

**11. High School DxD Season 1 and Season 2
=> Rating: 10/10

**12. InuYasha Season 1, Season 2, Movies
=>Rating: 10/10

**13. Zero no Tsukaima Season 1, 2 and 3
=>Rating: 10/10

**14. Vandread and Vandread 2nd Stage
=> Rating: 10/10

15. UFO Ultramaiden Valkyrie Season 1, 2,3 + OVAs
=>Rating: 10/08

**16: Rosario + Vampire Season 1 and Season 2
=>Rating: 10/10

17. Onegai Teacher
=> Rating: 10/8

18. Omamori Himari
=>Rating: 10/9

**19. Midori Days
=>Rating: 10/10

20. Love Hina Season 1 and Season 2
=>Rating:10/10

21. Kanokon
=>Rating: 10/10

22. Akane-iro ni Somaru Saka

=>Rating: 10/8

23. C3
=>Rating: 10/8

24. Amaenaideyo Katsu
 =>Rating: 10/5

25. Nagasarete Airantou

=>Rating: 10/8

26. Omamori Himari

=>Rating: 10/8

**27. Sekirei and Sekirei: Pure Engagement
=>Rating:10/10 

***28. Tenchi Muyo GXP

=>Rating:10/10

29. They Are My Noble Masters

=>Rating: 10/7

**30. Freezing
=>Rating: 10/9

If you are looking for nice App Launchers for your chrome browser then your search is over, follow this article to know the best available.

•  Three nice Apps launching applications for Chrome Browser.

1. Apps Launcher: https://chrome.google.com/webstore/detail/apps-launcher/ijmgkhchjindcjamnckoiahagecjnkdc

"Apps Launcher" - Screenshot.

How to block adult sites, malware domains from being accessed by minors ? Web filtering extensions for Google Chrome.

1. If you want to prevent yourself from visiting some specific sites, you can use the "Block Site" extension on Google Chrome Web Browser.

• Block Site: https://chrome.google.com/webstore/detail/eiimnmioipafcokbfikbljfdeojpcgbh

1. "Keygen.nl" is blocked because I have added that to the 'Block Site' extension's Black List.

2. This is the control panel for Block Site extension. From here you can add/remove sites.

3. Using 'Block Site', you can filter out bad words too.

4. If you want to force yourself to work, this setting will help you.

5. You can make 'Block Site' uninstallable, but for that you might have to pay.

• WebFilter Pro: https://chrome.google.com/webstore/detail/webfilter-pro-the-best-fi/ejgfoklefkbjadjcgjmnhfbdfjolojnn

1. With "WebFilter Pro", you will have the full control over its settings.You will be able to lock its settings using email and password. If you don't want the hassle of adding specific sites  in the blacklist as in "Block Site" extension, then this might just be the best choice for you. It uses cloud based content filtering. Just install and use. Read more about this extension here: http://www.cloudacl.com/support/

2. This is the control panel of "WebFilter Pro" extension. You can choose what kind of sites you want to block and the cloud filtering system will take care of everything else. After configuring everything ,to close the "Control Panel" and start blocking, choose: Working Mode = Kids

3. This is an example of what it does. As you can see "WebFilter Pro" has successfully blocked the adult site.

Best Mozilla Add-ons to supercharge your Firefox Browser.

I was always been a big fan of Firefox because of its simplicity and stability. Firefox runs on rock solid Gecko rendering engine. In my opinion Firefox is far more stable than Chrome. I have rarely faced any crash problem on Firefox whereas I have seen Chrome crashing a lot.

In this article I'm going to pinpoint some most useful Firefox add-ons which will supercharge your browser and made surfing the internet much more smoother.


I'm not going to include an extensive explanation here. Please follow this link and use the search bar to find the relevant add-on: https://addons.mozilla.org/en-US/firefox/

• 1. AdBlock Plus
  2. FireProxy
  3. FireBug
  4. QuickNotes
  5. ScrapBook
  6. SpeedDial
  7. QuickBlock
  8. Cache Status
  9. Fast Translate
  10. User Agent Switcher
  11. Cryptfire
  12. Privacy Protector
  13. Simple Mail
  14. Quick Wiki
  15. TinyUrl
  16. Who Stole My Images
  17. Cache Viewer Continued
  18. HTTPFox
  19. Reader
  20. Photobucket Uploader
  21. ScreenGrab
  22. SimilarWeb
• 23. Stylish
  24. Pixlr Grabber
  25. Magic Actions for Youtube
  26. Nimbus Screenshot
  27. Textarea Cache
  28. Ginger Grammer Checker
  29. WebDeveloper
  30. Cookie Manager+
  31. Ghostery.
  32. PopVideo
  33. Session Manager
  34. Mozilla Archive Format
  35. DownThemAll
  36. FlashGot
  37. Epub Reader
  38. Omnibar
  39. Add to Search Bar
  40. Restartless Restart
  41. Brief
  42. LiveClick
  43. Copy Plain Text 2
  44. Download Manager Tweak
  45. Encrypted Communication
  46. FasterFox
  47. FlagFox
  48. FoxVox
  49. Grab and Drag
  50. Image Zoom
  51. Imgur Uploader
  52. MeasureIt
  53. Menu Editor
  54. Offline QR Generator
  55.  Print Edit
  56. Private Tab
  57. Profile Switcher
  58. QRCode Scanner
  59. Resurrect Pages
  60. Scroll To Top
  61. TableTools2
• 62. TinyURL Generator
  63. TurnOffTheLights
  64. Work Offline
  65. Xinha Here
  66. Zoom Page
  67. Update Scanner
  68. Master Password+
  69. Xmarks Sync
  70. Form History Control
  78. Lazarus Form Recovery.
  

Two sites where you can watch or download animes for free.

1. Animefreak.Tv : For English Subbed Animes.

2. Watchdub.com: For English Dubbed Animes.

• Both these sites provides small size watchable videos (50-70 MB). Animefreak.Tv's video quality is slightly better, but mostly provides Subbed videos.

Powerful,easy to use, alternative AdBlocker of "AdBlock Plus" for Firefox users. Bluhell Firewall, the newest and the best AdBlocker. Blocks Phishing Sites, Malware Domains etc..

For a very long time I was looking for an alternative to "AdBlock Plus" for Firefox. Adblock Plus tends to use lots of RAM while active. The more "Rule Subscriptions" I select, the more CPU power and RAM it consumes.

Recently while browsing through Firefox Addons directory I've came upon a Addon which exactly does what I was looking for so long.

If you are too looking for a simple, low memory consuming ad-blocker, that is just as powerful & as easy as AdBlock Plus  then install : Bluhell Firewall.

 

Bluhell Firewall does not provies a lots of options as AdBlock Plus and there is no need for configuring anything. Just install and you will get an toolbar icon; using which you can easily activate and deactivate the Blocking Shield.

Bluhell Firewall seems to be using 70% less RAM than AdBlock ,although blocking all the same ads as AdBlock had done all this time.

Install Link: https://addons.mozilla.org/en-US/firefox/addon/bluhell-firewall/

Spark Browser, the fastest, attractive looking, CPU friendly Web Browser for Windows. Best alternative for Google Chrome.

• If you are looking for alternatives for your buggy "Google Chrome" then here is a choice for you: Spark Browser


• Spark Browser is a simple and easy-to-use internet browser based on Chrome. Attractive design, changeable skins, good integration with Facebook and a feature for downloading videos make Spark Browser worth trying.






• Spark Browser comes with-
• 1. Integrated Video Downloader (Sniffer).
• 2. Sidebar bookmarks editor, Zoom Controller, Facebook App and Download Manager.
• 3. Integrated Screen Capture tool.
• 4. Integrated Mouse gestures.
• 5. Integrated Tab Mute and Undo Tab Close feature.
• 6. Integrated PDF viewer.

• With Spark Browser you can use over 100s of extensions without much CPU overhead compared to other "Chromium" based browsers such as "Torch, Comodo Dragon, Superbird" or even "Google Chrome" itself. 

• *Spark Browser Beta comes with a Torrent Downloader. With that you can download torrents right away from within the browser interface.

• Download Link: http://en.browser.baidu.com/