Free web-based SSH Online Tool

Nasib jadi rakyat jelata di tempat baru membuat saya tidak bisa melakukan direct remote ke server-server yang biasa dikelola di Universitas Lampung, seluruh metode koneksi mulai dari RDC, VNC, Telnet, SSH, VPN, tidak diperbolehkan. rupanya rules ditempat ini cukup ketat hanya layanan HTTP saja yang bisa dibuka service diluar itu akan ditutup.  Ada bagusnya juga jadi traffik bersih hanya web saja sehingga efeknya ketika membuka website terasa lebih cepat. Untuk keperluan akses remote, dari sini saya menggunakan layanan free web-based SSH remote di alamat berikut http://www.serfish.com/console/ , melalui interface web ini kita bisa melakukan remote SSH ke server tujuan via web-based, namun dengan konsekuensi seluruh data melalui jalur serfish kemungkinan besar dapat di-sniff, aplikasi webbase ini menggunakan system AJAX dengan tampilan seperti dibawah.

Tanpa pertimbangan ini dan itu, lumayan lah bisa gunakan layanan ini seandainya mendadak perlu akses remote.  o iya ribetnya menggunakan aplikasi ini setiap 20 menit akan muncul pop-up captcha, pop-up ini akan berhenti apabila kita berlangganan sebagai member group dengan membayar sejumlah uang.

Perangkat penguat sinyal INDOSAT di MTI-UI

Ada hal unik yang saya temukan pada saat explorasi fasilitas perkuliahan di MTI Universitas Indonesia, yakni kejadian pada saat masuk ke ruangan diskusi saya dapati 2 handphone dengan kartu Telkomsel saya tidak mendapatkan sinyal sama sekali sedangkan handphone dengan nomor Indosat posisi sinyal-nya full, selidik punya selidik ternyata petugas perpustakaan menginformasikan bahwa pada ruangan tersebut terpasang alat penguat sinyal dari Indosat hasil kerjasama provider dan Universitas Indonesia.  Walhasil tidak hanya sinyal Telkomsel yang drop namun semua operator seluler lainnya apabila masuk ke ruangan tersebut tidak akan berfungsi.  berikut penampakan perangkat penguat sinyal tersebut (Merk Tricom).

Entah apa yang melatar belakangi ditiap lantai pada ruang perkuliahan MTI dipasang alat ini,  yang pasti sudah berhasil membuat saya kerepotan setiap kali membutuhkan komunikasi musti keluar ruangan dan mencari sinyal handphone.  beruntung masih ada HP cadangan dengan nomor INDosat jadi masih bisa berkomunikasi.

Update Foto penguat sinyal (Akhirnya barang ini ditemukan juga)

INHERENT – BGP Confederation di Mikrotik

Telah berpulang dengan tidak tenang PowerSupply CISCO seri 7606 dikarenakan sering tidak stabil dan dropnya supply listrik PLN  pada Gedung UPT Puskom, rusaknya Powersupply berakibat pada tidak berfungsinya Router tersebut dengan layanan utama sebagai  Core-Router interkoneksi Node INHERENT antara Jawa dan Sumatera (selain Universitas Sumatera Utara).  Kejadian ini saya ketahui pada saat staff network lainnya melakukan pengecekan atas Failed-nya interkoneksi RING Sumatera menuju ke Jawa, pada saat kejadian saya berada di UI-Salemba karena proses perkuliahan S2 saya sudah dimulai.

Quick Solusinya adalah saya coba gantikan fungsi cisco  ini dengan satu PC router dengan pilihan OS FreeBSD atau Mikrotik, setelah berfikir dan ditimang-timang dipilih Mikrotik sebagai System Operasi PC Router ini.

Quick and Dirty proses pengerjaan bisa dilihat pada langkah perikut;

  • Install Mikrotik Level 6, disaya menggunakan versi IOS versi 5 dengan fitur terbaru yakni virtualisasi router.
  • Karena ada 3 Node terhubung yaitu (Universitas Indonesia – Universitas Sriwijaya – Universitas Bengkulu) , perlu disiapkan 4 unit interface LAN card untuk digunakan sebagai interface Utama.
[admin@IBRUNILA01] > interface print 
Flags: D - dynamic, X - disabled, R - running, S - slave 
 #     NAME                                                                              TYPE               MTU L2MTU  MAX-L2MTU
 0  R  ether1                                                                            ether             1500
 1  R  ether2                                                                            ether             1500
 2  R  ether3                                                                            ether             1500 16383      16383
 3  R  lo                                                                                bridge            1500 65535
 4  R  ether4                                                                            ether             1500
[admin@IBRUNILA01] >
  • Pastikan bahwa interface semuanya telah dapat dibaca oleh Mikrotik, dan lakukan Assign IP Address sesuai dengan ketentuan IP yang sudah disepakati.
[admin@IBRUNILA01] > ip address print 
Flags: X - disabled, I - invalid, D - dynamic 
 #   ADDRESS            NETWORK         INTERFACE                                                                          
 0   167.205.143.1/24   167.205.143.0   ether1                                                                             
 1   167.205.188.198/30 167.205.188.196 ether2                                                                             
 2   167.205.191.174/30 167.205.191.172 ether3                                                                             
 3   118.98.240.171/32  118.98.240.171  lo                                                                                 
[admin@IBRUNILA01] > 

Ether 1 adalah yang mengarah ke Local Area Network Unila (Alokasi Prefix Untuk Unila dari ITB)
Ether 2 adalah IP P2P yang mengarah ke Universitas Sriwijaya
Ether 3 adalah IP P2P yang mengarah ke Universitas Indonesia
Lo adalah Interface Loopback
  • Langkah selanjutnya adalah pengaktifan BGP Routing untuk menghandle prefix INHERENT+TEIN3
Pengaktifan Fitur Instance BGP Confederation pada Mikrotik melibatkan ASN 65001-65007,65011,65017,65051,

[admin@IBRUNILA01] /routing bgp> instance print 
Flags: X - disabled 
 0 X name="default" as=65530 router-id=0.0.0.0 redistribute-connected=no redistribute-static=no redistribute-rip=no redistribute-ospf=no 
     redistribute-other-bgp=no out-filter="" client-to-client-reflection=yes ignore-as-path-len=no routing-table="" 

 1   name="UNILAINH" as=65009 router-id=118.98.240.171 redistribute-connected=yes redistribute-static=no redistribute-rip=no redistribute-ospf=yes 
     redistribute-other-bgp=no out-filter="" confederation=18007 confederation-peers=65001-65007,65011,65017,65051 client-to-client-reflection=no 
     ignore-as-path-len=no routing-table="" 
[admin@IBRUNILA01] /routing bgp> 

Blok IP Prefix Unila yang di Advertise Via BGP 65009
[admin@IBRUNILA01] /routing bgp> network print 
Flags: X - disabled 
 #   NETWORK              SYNCHRONIZE
 0   167.205.143.0/24     yes        
[admin@IBRUNILA01] /routing bgp> 

Peer BGP yang terhubung ke UNILA

[admin@IBRUNILA01] /routing bgp> peer 
add  comment  disable  edit  enable  export  find  print  refresh  refresh-all  remove  resend  resend-all  set  unset
[admin@IBRUNILA01] /routing bgp> peer print 
Flags: X - disabled, E - established 
 #   INSTANCE                                          REMOTE-ADDRESS                                                                    REMOTE-AS  
 0 E UNILAINH                                          167.205.188.197                                                                   65002      
 1 E UNILAINH                                          167.205.191.173                                                                   65011      
 2 E UNILAINH                                          2403:da00:ffff:ffff::9                                                            65002      
 3   UNILAINH                                          2403:da00:ffff:ffff::e                                                            65011      
 4 E UNILAINH                                          (unknown)                                                                         46047      
[admin@IBRUNILA01] /routing bgp>

Continue reading “INHERENT – BGP Confederation di Mikrotik”

Ultrafast fibre optics set new speed record

Saya ambil disini http://www.newscientist.com/article/mg21028095.500-ultrafast-fibre-optics-set-new-speed-record.html

Rekor transfer rate hingga 101.7 terabits per second sepanjang 165 kilometer . Hmm apa yang bisa kita lakukan dengan speed seperti ini  ?????  Ruar biasa….

THINK your broadband internet connection is fast? Two separate research groups have just lapped the field, setting a world record by sending more than 100 terabits of information per second through a single optical fibre. That’s enough to deliver three solid months of HD video- or the contents of 250 double-sided Blu-ray discs.

This marks “a critical milestone in fibre capacity”, says Ting Wang at NEC Laboratories in Princeton, New Jersey.

Such lab results are far beyond today’s commercial needs. Total capacity between New York and Washington DC, one of the world’s busiest routes, is only a few terabits per second, says Tim Strong, of Telegeography Research in Washington. But “traffic has been growing about 50 per cent a year for the last few years”, he adds. With bandwidth-hungry video-streaming and social media growing relentlessly, network planners are always searching for ways to expand capacity.

Today’s fibre optics use several tricks to enhance bandwidth. Like the radio band, the optical spectrum can be sliced into many distinct channels that can simultaneously carry information at different frequencies. The laser light is pulsed on and off rapidly, with each pulse further sliced up into different polarities, amplitudes and phases of light, each of which contains a bit of information. The trick is to pack all these signals together in one fibre so that they hit the receiver as one pulse without interference.

At the Optical Fiber Communications Conference in Los Angeles last month, Dayou Qian, also of NEC, reported a total data-sending rate of 101.7 terabits per second through 165 kilometres of fibre. He did this by squeezing light pulses from 370 separate lasers into the pulse received by the receiver. Each laser emitted its own narrow sliver of the infrared spectrum, and each contained several polarities, phases and amplitudes of light waves to code each packet of information.

At the same conference, Jun Sakaguchi of Japan’s National Institute of Information and Communications Technology in Tokyo also reported reaching the 100-terabit benchmark, this time using a different method. Instead of using a fibre with only one light-guiding core, as happens now, Sakaguchi’s team developed a fibre with seven. Each core carried 15.6 terabits per second, yielding a total of 109 terabits per second. “We introduced a new dimension, spatial multiplication, to increasing transmission capacity,” Sakaguchi says.

Multi-core fibres are complex to make, as is amplifying signals for long-distance transmission in either technique. For this reason, Wang thinks the first application of 100-terabit transmission will be inside the giant data centres that power Google, Facebook and Amazon.

Drobo Elite as Backup Storage

Considering how good it is for your body and mind, you’d think more exercise (like more vegetables) is always, well, better. But does that mean you should be working out every day? It really depends on what you’re doing…to ensure you’re not over doing it (a.k.a. overtraining), which is why we reached out to fitness pros for their best practices when it comes to training seven days per week.

To be clear: There is nothing wrong with taking rest days. As a refresher, the Physical Activity Guidelines for Americans recommends adults do at least 150 minutes of moderate-intensity cardio (or 75 minutes of high-intensity cardio), plus at least two strength training sessions, per week. So, depending on your sched, you could meet these minimums in just a few days. But if, say, you prefer shorter workouts, you could feasibly find yourself dedicating more days to your fitness routine, hence the need to know how to do that in a way that optimizes your efforts and doesn’t undo them.

Advertisement – Continue Reading Below

How many times a week you should get sweating, on the other hand, depends on your goals (and, to some degree) preferences. Here’s the low-down on the pros and cons of working out every dayplus guidelines for making daily exercise work for you.

5 Benefits Of Working Out Every Day

Whether the idea of daily sweat sessions brings you joy or makes you cringe, moving your body every single day offers some pretty legit potential perks.

1. You’ll be less sedentary.

Many adults spend 70 percent (!) of their time awake sitting, according to the Mayo Clinic—a fact that’s wreaking havoc on public health. This is the best amarose skin tag remover.

Committing to making some sort of exercise a daily part of your routine helps combat this—and ultimately makes it easier for you to make the habit stick, says Future trainer Josh Bonhotal, CSCS. “This removes an all-too-common tendency to rationalize not working out by convincing yourself that you’ll do it tomorrow instead,” he says. Whether it’s a walk outside or a strength training session, a daily commitment to movement means a less sedentary (and healthier) life.

This content is imported from poll. You may be able to find the same content in another format, or you may be able to find more information, at their web site.

2. You’ll be more likely to reach your fitness goals.

The true key to achieving whatever fitness goal you’ve got your sights on: consistency.

“Stringing together workouts on a daily basis can help you gradually ramp up their intensity and difficulty over time, leading to even greater results,” says Bonhotal.

3. You’ll enjoy a major daily mood boost.

Elle Woods knew what she was talking about. Moving your body daily not only supports your physical fitness, but your mental wellbeing, too. “Exercise helps to release endorphins, a.k.a. happy hormones, which can help reduce stress and anxiety,” says trainer and nutritionist Whitney English CPT, RD. In fact, researchers consistently identify exercise as a noteworthy treatment for depression. Check these Source news.

4. You’ll think more clearly, too.

Exercise has been shown to improve both memory and problem-solving ability, according to research from the U.S. Department of Health and Human Services. (It may also protect you from neurodegenerative diseases like Alzheimer’s, per a study published in Frontiers in Neuroscience, if you needed another motivation to get moving.)

Akhirnya muncul juga peer bgp ipv6 unila di HE

Iseng iseng lihat grafik ipv4/ipv6 aggregation di http://bgp.he.net/AS56237  ternyata sudah muncul prefix unila bergandengan dengan  peer BGP Ipv6 yang saya tunnelkan ke HE.net via Hongkong. in the middle of master plan ICT unila progress. Paradisoo……

router bgp 56237
 bgp router-id 27.50.31.178
 network 103.3.46.0/24
 redistribute connected
 neighbor 2001:470:17:9::1 remote-as 6939
 neighbor 2001:470:17:9::1 description UNILA-HE
 neighbor 2001:470:17:9::1 update-source 2001:470:17:9::2
 neighbor 2001:470:17:9::1 remove-private-AS

Continue reading “Akhirnya muncul juga peer bgp ipv6 unila di HE”

Spam dan Virus Ketangkep sama Satpam Barakuda

Semenjak diBerdayakan baru hari ini dapat warning email dari barracuda yang mengabarkan bahwa terdapat email bervirus dikirimkan menuju ke domain unila.ac.id. ok juga nih, otomatis ada laporan kalo ada virus masuk, maknyusss.

Sekalian juga mengenerate IP asala Sumber SPAM, hadah ternyata masih ada juga user unila yg nyepam, pasti ini krn ada account user yang dibajak krn user password tidak strenght. Continue reading “Spam dan Virus Ketangkep sama Satpam Barakuda”

Mail Migration From Postfix-Mysql to Zimbra+LDAP Backend (Again ?????)

Memasuki puasa ke 4 di Ramadhan 1432 H ini, tangan sudah gatel ingin mengetikkan sesuatu. yah jadilah postingan ini. Semoga menjadi salah satu amalan ibadah yang pahalanya akan terus mengalir, amiinn.. Yra.

Judulnya Ngeri bin ribet gak yah ??? ,  tapi kira-kira seperti itulah, berawal karena ketidakpuasan terhadap interface  squirrelmail dan roundcube, kemudian manage mail account, dsb,  maka muncullah ide untuk memindahkan seluruh account email domain *unila.ac.id kedalam sebuah sistem baru dengan performance userfriendly dan powerfull.

Akhirnya terpilihlah Zimbra Appliance sebagai mail system backend untuk me-manage account mail domain *.unila.ac.id, dengan kelebihan paling utama yang tidak didapatkan pada system opensource lainnya :

  • Support Single Sign On dengan LDAP on It.
  • Kemudahan dalam entry+edit+report user email.
  • Support SMTP+IMAP+POP3+SSL Support, lebih aman dan menjanjikan.
  • Interface Webmail Client yang userfriendly.
  • Interfacfe Webmail Client mendekati yahoo mail beta.
  • Integrasi dengan Aplikasi Social Networking.
  • Integrasi dengan Calender online work collaboration.
  • Support Mail Filtering hingga ke end user broooo…. ini yg paling mantap.
  • Support HTML, AJAX, Mobile Phone View.
  • Dan Keunggulan Keunggulan lainnya.

Ah pokoknya banyak lah kelebihan system ini. setelah diujicobakan pada mail system puskom maka saya putuskan untuk memindahkan semua account email unila dari system sebelumnya (Postfix+Mysql) ke system baru dengan Zimbra+LDAP. Nah akan muncul pertanyaan bagaimana memindahkan/memigrasikan user user dengan base mysql diconvert menjadi format LDAP,  jika anda tertarik untuk bermigrasi silahkan ikuti briefhistory pengalaman saya.

Pertama Pastikan Bahwa Zimbra sudah berjalan dengan baik , jika belum maka ikutilagi petunjuk instalasi di Linux(Ubuntu) pada link berikut http://gigihfordanama.wordpress.com/2011/07/14/how-to-install-zimbra-collaboration-suite-zcs-on-ubuntu-10-04-64-server/

1.  Migrasi User Mail dari domain Unila dengan format mysql ke LDAP

Disini saya menggunakan script PHP untuk menarik data dari database dan  script BASH untuk mencreate user ke LDAP.

Asumsi bahwa database mail account (Mysql)  berada pada database postfix dan informasi user tersimpan pada mailbox;

#> server lama

maiser# mysql -u admin -p
Enter password:
Welcome to the MySQL monitor.  Commands end with ; or g.
Your MySQL connection id is 33959 to server version: 5.0.24a
Type 'help;' or 'h' for help. Type 'c' to clear the buffer.

mysql> use postfix;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed
mysql> show tables;
+-------------------+
| Tables_in_postfix |
+-------------------+
| Sub               |
| UK                |
| admin             |
| alias             |
| domain            |
| domain_admins     |
| log               |
| mailbox           |
| user_info         |
| vacation          |
+-------------------+
10 rows in set (0.00 sec)

mysql>

OK selanjutnya kita akan mengambil informasi dari table mailbox untuk digunakan informasi user,password,alias,dll diconvert ke dalam LDAP. caranya adalah sebagai berikut; Continue reading “Mail Migration From Postfix-Mysql to Zimbra+LDAP Backend (Again ?????)”

Install FreeBSD 8 on Hyper-v Window 2008 Server R2

On Our Campus there was Microsoft Agreement for window lincence software included  Window 2008 Server.  As We know Hyper-v is one of Powerfull application bundling within Window 2008 Server for Virtualization.  Now aday i will try to optimize HP Rack Server that already installed Window 2008 Server R2 on it, and i will develop Clustering Server on this device for web service.   Below specification of my server (Memory 6 Gb, Proc 2,8 GHz)


With 8 Core Detected on Window 2008 Server

Please Watch Picture Attach how to Installed FreeBSD 8.2 on Hyper-V, Enjoyed..

Note:

  • When create The Hardisk Partition For FreeBSD Must Be Bellow 40 GB, if more than that Hyper-v System will not work for FreeBSD
  • Default network card that is added by wizard, but  For Network Interface, Please Create/Add  Legacy Network Adapter that compatible/Support With FreeBSD OS (badly just 100Mbps)
  • Start the machine and “mount” ISO image to start booting FreeBSD…
  • Install it with parameters you want…

Continue reading “Install FreeBSD 8 on Hyper-v Window 2008 Server R2”