My Desk Work | MustNofee

Prevent SSH Brute Force Attack with Denyhosts on FreeBSD

nofee@mustnofee.com (NoFee) — Sat, 05 Mar 2011 14:25:25 +0000

Sometime our machine get error about error login from log message on SSHD services. Maybe, our machine has been attached by someone with brute force SSH method. We can use firewall to prevent SSH brute force attack, or we can use sshguard, sshdfilter, or denyhosts to block brute force. This tools will block SSH brute force attack automatically. In here, I will use denyhosts to prevent SSH brute force on my machine.

SNMPD error, libperl.so not found

nofee@mustnofee.com (NoFee) — Wed, 08 Sep 2010 04:15:21 +0000

After doing the update freebsd, snpmd failed to load.
/libexec/ld-elf.so.1: Shared object "libperl.so" not found, required by "libnetsnmphelpers.so.20"

FreeBSD can not find the file "libperl.so". To overcome this can be done as follows:

HardDisk Capacity Monitoring with MRTG

nofee@mustnofee.com (NoFee) — Sat, 16 Jan 2010 03:05:11 +0000

At times, our lack of attention to what is the amount of disk usage is used by our server. Based on experience, a lot of admin Diskspace ignored this problem. Usually the only monitor traffic in and out that could be "captured" through the existing Ethernet. And if you note, actually we really need information about how the rest of our hard disk capacity, or how much is already in use. Monitoring capacity is necessary if we are using the machines we make, requires hard drive capacity is not to run out. For example for a proxy server, database server, and so on.

Reset Joomla 1.5 Password

nofee@mustnofee.com (NoFee) — Tue, 12 Jan 2010 22:33:35 +0000

Sometimes, we forget something. One of them is the password to the backend of our website using Joomla 1.5 engine, where we are located as Super Administrator. We have been updating Joomla models password encryption in the system. If at the previous Joomla or Joomla 1.0, Joomla uses MD5 encryption alone. We can easily replace it, by going to our database using phpmyadmin, then we replace our passwords with MD5 mode plus the password field.

But for now, it can no longer do. Joomla 1.5 is currently using a combination of encryption and encryption encryption MD5 salt. Before we go any further, there is a quick information about encryption and MD5 encryption salt.

MustNofee Link Checker

nofee@mustnofee.com (NoFee) — Sun, 03 Jan 2010 11:50:00 +0000

In this blog, MustNofee.com, there is now a new facility, which is MustNofee LinkChecker. What is MustNofee LinkChecker? MustNofee LinkChecker is one of the existing facilities in this virtual world, which provides the facility to check Pagerank, backlinks, and the popularity of a website.

Ylmf OS: Ubuntu "dressed" XP

nofee@mustnofee.com (NoFee) — Fri, 01 Jan 2010 03:59:47 +0000

A new breakthrough in the world of Linux. The developers of China has done many things on his ubuntu 9.10. They have done "face off" on the Ubuntu display changed to 9.10 which look similar to Windows XP. Starting from the log until the taskbar, at first glance there is no difference with Windows XP.

Happy New Year 2010

nofee@mustnofee.com (NoFee) — Thu, 31 Dec 2009 21:47:46 +0000

Nothing was already one year passed
Grief was happy to have traveled together in the year 2009.
Hopefully in the year 2010 we are better than the year 2009
Hopefully all our desires is achieved in the year 2010.
Happy new year 2010.

ADSL Connections Glance

nofee@mustnofee.com (NoFee) — Tue, 29 Dec 2009 23:17:32 +0000

Have we noticed about the condition of our internet connection? Especially when we use the services based ADSL connection. Perhaps we feel that our connection was slower than connections in other places that use the same service. Before discussing the conditions of our internet connection, it may be useful we need to know first, what is ADSL?

ADSL stands for Asymmetric Digital Subscriber Line which is one of the DSL technology. According to Wikipedia, features of ADSL is its asymmetric, namely that the data transferred in a different speed from one side to the other side.

ADSL is highly influenced by many factors, such as:

Blocking Internet Explorer 6 with Squid

nofee@mustnofee.com (NoFee) — Sat, 26 Dec 2009 01:37:14 +0000

Did you know that today, many websites that began eliminating compatibility with Internet Explorer 6 browser. Internet Explorer 6 has 119 bugs. For that of the sysadmin side to minimize grievances or complaints from customers is "Suggest to Upgrade to Internet Explorer Internet Explorer 7 or Internet Explorer 8 or to other browsers like Firefox, Opera, or Google Chrome".

Update Locate Database on FreeBSD

nofee@mustnofee.com (NoFee) — Tue, 31 Mar 2009 16:25:15 +0000

Have the system we are using FreeBSD, we are searching the files. When using whereis can not find the file, then we will use locate.

However, if our system has been installed, we often see an error message when executing this command locate. Error message is as follows:

locate: database too small: /var/db/locate.database

Remove ads on Yahoo Messenger

nofee@mustnofee.com (NoFee) — Sat, 21 Mar 2009 23:48:08 +0000

Yahoo Messenger is one of the existing Instant Messenger and Yahoo issued. There are tips and tricks so that we can save more bandwidth than Yahoo Messenger is (very useful for Internet users based quotas). Namely by removing existing ads on Yahoo Messenger Window. There are a few that we must do in order to eliminate the different versions ini. Because different versions, different way, too.

Yahoo Messenger 9 Problems In Send Files?

nofee@mustnofee.com (NoFee) — Thu, 05 Mar 2009 23:27:20 +0000

Often times, we send the file by using the facilities Send Files from Yahoo Messenger. In addition to practical, too fast. However, if we are using Yahoo Messenger version 9.0.0.1912 or 9.0.0.2034 version, we will have difficulty in sending the file through the facilities of Send File.

Some time ago, along with several colleagues, I am doing research, whether true Yahoo Messenger 9 is there a bug in the Send File. First experiment, by sending files of 176KB, the result of Success. Then the file size increased to 660KB, the first attempt to send files FAIL, after the start until the third time, finally SUCCESS. Then, try to send files with 1.1 MB size results SUCCESS. Then try again, with a 1.6 MB file size, the results VAIN, although at times try to try to restart the application Messernger Yahoo still FAIL.

Internet Explorer 7 Hangs

Tue, 03 Mar 2009 10:02:53 +0000

Kejadian Internet Explorer 7 yang tiba-tiba hangs atau not reponding ini sebenarnya telah lama terjadi pada Laptop saya. Hanya karena masih malas untuk mencari, kenapa koq sampai hal ini terjadi, sehingga lama IE-7 ga saya pakai. Tiap kali dipakai, kalau mau di tutup, selalu saja not responding, atau kadang membuka suatu link, keterangan pada status bar selalu connecting saja.

Sempat terpikirkan untuk uninstall dan kemudian install lagi IE-7 ini. Ternyata pada Add/Remove Program saya, pilihan tombol Remove tidak ada pada IE-7. Wew... tambah bingung, mesti gimana ini. Masa saya harus memiliki IE-7 tetapi tidak bisa dipakai, masa harus install ulang windows.. Jangan deh. Males.

Tuning Apache WebServer

Tue, 03 Mar 2009 00:05:56 +0000

Mungkin, kita pernah mengalami, bahkan sering mengalami. Proses yang dihasilkan oleh Apache (httpd) begitu banyak sehingga sangat-sangat memakan resource yang kita miliki. Apabila kita memiliki mesin yang powerfull, hal ini tidak begitu berpengaruh. Akan tetapi, apabila mesin yang kita miliki sangat terbatas resource nya, kita perlu men-tuning sedikit pada konfigurasi httpd-nya.

Perubahan Itu Penting

Mon, 02 Mar 2009 13:10:50 +0000

Photo by : Flickr

Seperti hal nya perubahan dari siang ke malam, perubahan musim panas ke musim penghujan. Dengan ada perubahan-perubahan tersebut, maka saya pun ingin adanya perubahan juga. Apakah perubahan yang ingin saya lakukan?

Blog ini pun akan mengalami perubahan. Banyak sekali nantinya perubahan yang ada pada blog ini.

OK deh, tunggu saat nya nanti, perubahan akan terjadi, dan anda pun akan merasakan sendiri perubahannya.

Error Message When Install Program on Windows XP

Fri, 10 Oct 2008 09:11:28 +0000

Sometimes, when you try to install a program on Windows XP, you may receive the following error message like this :

This issue may occur when both the following condition are true :

You are using Windows XP in Normal Mode.
The Windows Installer Service that is included with Windows XP is unregistered or damaged.

Setting Up no-password SSH

Thu, 02 Oct 2008 04:33:22 +0000

Sometime we had a script for running process in remote machine. In this case, we need to setup SSH with no-password to remote another machine and run process what we need.
The basic idea is, however, that in the cryptosystem that ssh uses (RSA or/and DSA) the encription and decription are done using diferent keys
Basically, what the user (client) needs is to generate a public/private key pair. The server will know the public key, but only the client will know the private key.

GeoEye-1 Google New Satellite

Fri, 26 Sep 2008 19:19:02 +0000

The highest resolution commercial Earth imaging satellite to date, the GeoEye-1, was launched over the weekend on a Delta-II rocket that carried the Google logo alongside the GeoEye logo on its side. The satellite was built as part of the U.S. National Geospatial Agency’s NextView program under which the agency shared the costs of engineering, construction and launch of new generation satellites to support the commercial satellite imaging industry. For the GeoEye-1 satellite the agency funded about US$237 million of the total $502 million price tag. The agency has also committed to buying imaging data from the satellite for at least the first year and a half of operations.

Joomla 1.5.7 Security Release

Tue, 16 Sep 2008 21:50:28 +0000

On September 9 2008, Joomla release Joomla 1.5.7 Security [Wovusani]. This is a security release and contains a number of bug fixes, improvements as well as security fixes. It is strongly recommended that users immediately upgrade. It has been nearly four weeks since Joomla 1.5.6 was released on August 12, 2008.

Monitoring DNS Server

Fri, 12 Sep 2008 17:17:44 +0000

Short for Domain Name System (or Service or Server), an Internet service that translates domain names into IP addresses. Because domain names are alphabetic, they're easier to remember. The Internet however, is really based on IP addresses. Every time you use a domain name, therefore, a DNS service must translate the name into the corresponding IP address.

Monitoring Machine with Mikrotik

Wed, 10 Sep 2008 09:42:53 +0000

^{Picture from Administrator.org}

Mikrotik has a tool to monitoring another machine and when the machine is down or up, we can running script. This tool is netwatch.

Netwatch monitors state of hosts on the network. It does so by sending ICMP pings to the list of specified IP addresses. For each entry in netwatch table you can specify IP address, ping interval and console scripts.

Just For Fun

Fri, 05 Sep 2008 16:45:57 +0000

Try here... Flash Games...

Just for fun.. I will add more game later..

Google Chrome

Thu, 04 Sep 2008 06:11:52 +0000

On 1 September 2008, Google lauch thier new product Google Chrome.

What is Google Chrome :
Google Chrome is Google’s open source browser project.
As rumored before under the name of “Google Browser”, this will be based on the existing rendering engine Webkit. Furthermore, it will include Google’s Gears project.

Monitoring Squid with MRTG

Mon, 01 Sep 2008 11:30:01 +0000

If you want to know utilization or performance your Squid Proxy, you can use MRTG to monitoring Squid Proxy. This can do, because Squid Proxy support SNMP and you must configure squid with SNMP support.

What is Dark Fiber

Thu, 28 Aug 2008 12:56:52 +0000

Dark fiber is a term used to describe fiber optic cable that is not being used at the time. The amount of dark fiber, particularly in the United States, is very high. Dark fiber is contrasted with active fiber optic cable, often referred to as lit cable.

In the past, dark fiber was virtually never sold. Telecommunications companies considered it their core asset, and selling it would be akin to selling off their business. Due to an incredible glut in the market, however, selling dark fiber has become extremely viable and is now a practice of many major telecommunications companies.

Testing Network Limit with Iperf

Sun, 24 Aug 2008 12:03:30 +0000

What Is Iperf?

Iperf is a tool to measure maximum TCP bandwidth, allowing the tuning of various parameters and UDP characteristics. Iperf reports bandwidth, delay jitter, datagram loss.

Features

TCP

Measure bandwidth
Report MSS/MTU size and observed read sizes.
Support for TCP window size via socket buffers.
Multi-threaded if pthreads or Win32 threads are available. Client and server can have multiple simultaneous connections.

Setting Up Squid on FreeBSD

Fri, 22 Aug 2008 00:39:49 +0000

Squid is web caching and conserving badwidth application. With Squid, we will reduce the traffic 30% or more from normal usage (without squid) and enhance respone time. In here, i will use squid 2.7.STABLE3.

Installing Squid.
You can download Squid from here. After you download the source of squid, then :
{xtypo_code}# tar zxvf squid-2.7.STABLE3.tar.gz
# cd squid-2.7.STABLE3
# ./configure '--sysconfdir=/etc/squid' '--enable-storeio=diskd,ufs,aufs' '--enable-delay-pools' \
'--enable-pf-transparent' '--enable-ipf-transparent' '--disable-ident-lookups' \
'--enable-removal-policies'
# make
# make install{/xtypo_code}

Try With Something New

Mon, 18 Aug 2008 16:08:59 +0000

I try something new last 3 days ago. I had move from Drupal to Joomla. I just want to try, how about with joomla for my blog, so I am sorry if there so many links change.

I hope with joomla I can find something new, something different then before.

Thanks to Fandi and Heru for help so I can use joomla for my blog.

Again, we will learn and share together...

Step By Step FreeBSD as Internet Server

Sat, 16 Aug 2008 03:46:39 +0000

Installing FreeBSD

1. Select Region.
2. Select Standart Installation.
3. Use all drive for FreeBSD.
4. Create Disklabel, on my installation use 80GB of harddisk, and here my disk label
  - / 512MB
  - swap 1GB
  - /tmp 1GB
  - /usr 4GB
  - /var 2GB
  - /home 1GB
  - /cache (all the rest off harddisk space).

Load Balancing on MikroTik

Sat, 16 Aug 2008 03:45:22 +0000

Quick Start for Impatient Configuration export from the gateway router:
{xtypo_code}/ ip address add address=192.168.0.1/24 network=192.168.0.0 broadcast=192.168.0.255 \
interface=Local comment="" disabled=no

add address=10.111.0.2/24 network=10.111.0.0 broadcast=10.111.0.255 \
interface=wlan2 comment="" disabled=no

add address=10.112.0.2/24 network=10.112.0.0 broadcast=10.112.0.255 \
interface=wlan1 comment="" disabled=no{/xtypo_code}

The Easy Way to setting Mikrotik + Squid and Simple Queue

nofee@mustnofee.com (NoFee) — Sat, 16 Aug 2008 03:43:24 +0000

In a Case, there is my client wishing topology in its(the network using machine Mikrotik which will be joined forces with Squid, where this Squid stays in machine FreeBSD. He wishs, arrangement of shaping easily, by using Simple Queue.

If topology like this : INET ------- Mikrotik --------- SQUID -------- Client

Bandwidth Management is handle by SQUID. We wanted is like this :

INET | Mikrotik ---- SQUID | Client

So, shaping to client is handle by Mikrotik.

User Datagram Protocol (UDP)

Sat, 16 Aug 2008 03:42:29 +0000

User Datagram Protocol (UDP) is one of the core protocols of the Internet protocol suite. Using UDP, programs on networked computers can send short messages sometimes known as datagrams (using Datagram Sockets) to one another. UDP is sometimes called the Universal Datagram Protocol. It was designed by David P. Reed in 1980.

Transmission Control Protocol (TCP)

Sat, 16 Aug 2008 03:41:26 +0000

The Transmission Control Protocol (TCP) is one of the core protocols of the Internet protocol suite. TCP provides reliable, in-order delivery of a stream of bytes, making it suitable for applications like file transfer and e-mail. It is so important in the Internet protocol suite that sometimes the entire suite is referred to as "the TCP/IP protocol suite." TCP is the transport protocol that manages the individual conversations between web servers and web clients. TCP divides the HTTP messages into smaller pieces, called segments, to be sent to the destination client. It is also responsible for controlling the size and rate at which messages are exchanged between the server and the client.

Want a list of users on your FreeBSD?

Sat, 16 Aug 2008 03:40:28 +0000

If you ever want a list of users on your system, use this little script:

cat /etc/passwd | cut -d: -f1 | grep -v \#

The cut command selects portions of a file. Use ":" as the delimiting character. And we want only the first field. The grep eliminates lines with # in them, which normally appear at the start of the password file. Exercises for the interested and motivated:

try the above command without the grep
remove the \ before the #
try -f5 instead of -f1.

Hope that helps.

Thank's to : The FreeBSD Diary

Sharing file using Samba on CentOS 4

Sat, 16 Aug 2008 03:39:13 +0000

Following I submit, way of using samba at CentOS. For other OS, usage of samba nor different far.

1. Install Centos 44 Don't forget when install there are option Firewall and selinux, please select;choose option “ no firewall” and Selinux chooses “ disable”.

Making Windows XP More Faster - Part 2

Sat, 16 Aug 2008 03:37:13 +0000

SPEEDUP FOLDER ACCESS - DISABLE LAST ACCESS UPDATE If you have a lot of folders and subdirectories on your computer, when you access a directory XP wastes a lot of time updating the time stamp showing the last access time for that directory and for ALL sub directories. To stop XP doing this you need to edit the registry. If you are uncomfortable doing this then please do not attempt.

Making Windows XP More Faster - Part 1

Sat, 16 Aug 2008 03:36:07 +0000

Some of the working tweaks you can do to your Windows XP can really be a blessing to your system’s speed. So I thought about sharing with you the safe tweaks on how to have a faster Windows XP. As a disclaimer do the following tweaks at your own risk.

Disable CD Autorun on Windows XP

Sat, 16 Aug 2008 03:35:02 +0000

To Disable CD Autoplay in Windows XP Pro

Start/Run/GPEDIT.MSC
Computer Configuration/Administrative Templates/System.
Locate the entry for Turn Off Autoplay and modify.

Setting up a basic MikroTik hotspot

nofee@mustnofee.com (NoFee) — Sat, 16 Aug 2008 03:33:35 +0000

Mikrotik RouterOS includes an excellent hotspot solution. Read on for details on getting a basic hotspot going using RouterOS on any standard x86 PC hardware or a RouterBOARD. The RouterOS hotspot solution is very powerful and only the very basics of the solution are covered here; just enough to get you started.

Drop port scanners on Mikrotik

Sat, 16 Aug 2008 03:31:40 +0000

To protect the Router from port scanners, we can record the IPs of hackers who try to scan your box. Using this address list we can drop connection from those IP in :

Setting Up Atheros AR5BXB63 on Ubuntu 8.04

nofee@mustnofee.com (NoFee) — Sat, 16 Aug 2008 03:28:22 +0000

I have Atheros AR5BXB63 chipset for my wireless card in my Laptop, when i install Ubuntu 8.04, there was problem to detect my wireless card.
I have done the following and it works now:

How to Fighting against unknown worm from Linux

Sat, 16 Aug 2008 03:27:40 +0000

This worm infecting user, by disguise user with Microsoft Windows folder icon, to open executable file that contain worm. How to delete: (From Linux console)

Setting Up Cacti

Sat, 16 Aug 2008 03:27:19 +0000

Cacti is a complete frontend to RRDTool, it stores all of the necessary information to create graphs and populate them with data in a MySQL database. The frontend is completely PHP driven. Along with being able to maintain Graphs, Data Sources, and Round Robin Archives in a database, cacti handles the data gathering. There is also SNMP support for those used to creating traffic graphs with MRTG.

Load Balancing with Mikrotik 3.x

nofee@mustnofee.com (NoFee) — Sat, 16 Aug 2008 03:25:11 +0000

When we want to make Loadbalancing system used Mikrotik 2.9.x, we can using the rule from here. But there is little different with Mikrotik 3.x
Ok then, let's started, i will use 5 connection here.

Blocking Connection Using Mikrotik With Layer7 Protocol

Sat, 16 Aug 2008 03:23:28 +0000

Layer7 Protocol is a method of looking for patterns in connections. It can classify packets as Kazaa, HTTP, Jabber, Citrix, Bittorrent, FTP, Gnucleus, eDonkey2000, etc., regardless of port. It complements existing classifiers that match on IP address, port numbers and so on.

Building PPPoE Server with Mikrotik

Sat, 16 Aug 2008 03:11:15 +0000

There are two types of interface (tunnel) items in PPTP server configuration - static users and dynamic connections. An interface is created for each tunnel established to the given server. Static interfaces are added administratively if there is a need to reference the particular interface name (in firewall rules or elsewhere) created for the particular user. Dynamic interfaces are added to this list automatically whenever a user is

IPv4 Subnetting Reference

Sat, 16 Aug 2008 02:56:30 +0000

Certain chunks of IPv4 address space are specially allocated by RFCs for special uses such as loopback (RFC 1643), Private networks (RFC 1918), and Zeroconf (RFC 3927) usage, and are not available for allocation by Regional Internet Registries (RIRs).