The free version can support 3 APs and 10 network devices, quite sufficient for me to use in home WLAN environment.
The connection at 11 Mbps was attained and kept up for 3 hours. During this time 11,000 successful pings were made. Both ends of the link were using SSH and logged into the other end. VNC was also used successfully WITHOUT frames being dropped. Ping times varied from 0.01 ms to 400 ms, seeming to average around 10 ms. The connection had an astounding signal strength of -37 dBm, bottoming out at around -50 dBm throughout the 3 hours. The noise levels were around -84 dBm.
This wireless router, Model Netgear RangeMax WPN824, has recently attracted a great deal of attention in computer malls. The vendor claims that the coverage is 10 times better than 802.11b/g with the use of 7 built-in smart antennas and MIMO architecture. At any time, it will select the antenna which beams the best signal strength to reach the wireless clients.
I can not imagine how this tiny box with a book-size can have up to 7 antennas inside. I guess in the not too distant future, we will soon witness the birth of 10-antenna or 12-antenna wireless routers if more antennas can really improve the performance.
Google has developed an add-in to publish blog through Mircosoft Word. After the successful installation, a Blogger toolbar will be added.
Thats sound as an astonishing news to the blogger community. Unfortunately, images and tables appear on Word documents can not be published.
Hey…. Google needs to put more effort to overcome these obstacles.
The prime objective is to bridge the digital divide which makes lower income people not able to access the Internet. All corporate employees, federal officers, police and fire departments are able to benefit.
Who will be the biggest winners ? My idea that with such a fanatastic wireless infrasturcture being put in place, the sales of notebook PCs will double or triple in San Francisco. Notebook vendors should be asked to sponsor this municpial project.
Who will be the losers ? I can imagine that 2.5G mobile operators will lose a large part of their revenues.
Will such development be extended to Hong Kong. When affordable Wifi hotspots are all over the city, I do not need to subscribe to 2.5 G or perhaps 3G service.
Wardriving - the practice of driving around to detect open Wifi nodes.
Warchalking - the drawing of symbols in public places to advertise an open Wi-Fi wireless network that other people can use to hook up to the Internet.
Wardialing - the practice of dialing many numbers for finding a modem connection.
Certainly, wardialing has almost disappeared nowadays.
For warchalking, a special symbol is to be drawn on a nearby object, such as a wall, the pavement, or a lamp post.
In our office, we have Wifi for visitors to hook up their notebook PCs. Hmmm.... just thinking shall we warchalk the symbol on easily seen locations.
I find NetStumbler from www.netstumbler.com. This is an amazing tool for trobleshooting problems in WLAN. It can be used to find locations with poor coverage by reading the S/N ratio and whether other networks nearby might cause interference to your own WLAN. On wireless bridge application, it can help to align the directional antenna in order to get the maximum signal strength.
Tcping requires a port number in addition to the destination IP address when initiating the command.
Tcping in Linux can be found everywhere on the Internet. It is difficult to find Windows-based tcping. Fortunately, I've got one.
Game centers, Internet cafes and universities all have reborn cards installed in PCs.
Reborn-card will wipe out any installed programs by users at bootup and return to the Day 1 installed configuration. Good for preventing viruses and malicious codes and to ensure all the default configurations are not changed in any way.
For universities, people think that there might be a need to set aside a special partition to store user data where the data will remain intact upon bootup. Hey....man, I rather think that with the emergence of USB memory finger at extremely low cost, it is redundant to consider such a common partition.
Linksys Model CIT200 is really a fantastic VoIP DECT phone. The phone itself is running skype VoIP and the base unit is connected back to a PC via USB for hooking up to the Internet. The colour display defintely attracts a great deal of attention.
It seems that PSTN DECT phones are being phased out now.
This phone is not available in Hong Kong yet. We may have to wait for several months for this product to come to our place.
I think not only personal users need the backup storage, cooporate users also need the backup service to protect against the danger of fire in offices. Thought it is affordable to me, I very much hope HK ISP can provide this kind of service. After all, sending 100 MB of encrypted data to an US storage server consume considerable time due to limitation in international bandwidth of my ISP.
Wooo.. finally, the day has come for service providers to roll-out affordable network storage service. Many people have dream about this for a long time.
.aero - for the air transport industry
.biz - for business use, an alternative to .com
.coop - for cooperatives
.info - for informational sites, but unrestricted
.name - for individuals
.museum - of course for museum
.pro - for professionals
The ".name" and ".pro" domains sound not attractive to me. I would prefer to have my personal domain names ending with ".com" or ".idv.hk" or just ".hk".
The IP address 188.8.131.52 is logged in 1632859 lines of firewall logs/reports submitted by different parties and it is estimated that up to 223286 hosts have been targetted for attack. This IP address 184.108.40.206 is originating from mainland China. Fighting back initiative has been launched by Dshield to ask the corresponding ISP or service provider to take appropriate actions.
In Fedora Core series, the DNS daemon "named" is run in a chroot environment. The default directory path is changed to "/var/named/chroot/var/named" instead of "/var/named".
The idea behind chroot is to tighten security. The service is also run by a non-root user. In a chroot jail, the process is unable to access any files outside the jail. This process prevents malicious code to start in the even of buffer overflow.
Congratulations to Redhat Fedora Core team for successfully improving security of DNS service.