IT Resource

Ping verifies IP-level connectivity to another TCP/IP computer by sending Internet Control Message Protocol (ICMP) Echo Request messages. The receipt of corresponding Echo Reply messages are displayed, along with round-trip times. Ping is the primary TCP/IP command used to troubleshoot connectivity, reachability, and name resolution.

Examples of Ping

Windows
ping google.com

Pinging google.com [64.223.167.99] with 32 bytes of data:
Reply from 64.223.167.99: bytes=32 time=37ms TTL=57
Reply from 64.223.167.99: bytes=32 time=37ms TTL=57
Reply from 64.223.167.99: bytes=32 time=75ms TTL=57
Reply from 64.223.167.99: bytes=32 time=40ms TTL=57

Ping statistics for 64.223.167.99:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 37ms, Maximum = 75ms, Average = 47ms

Linux
ping -c 5 itresource.com.au

PING itresource.com.au(203.88.118.177) 56(84) bytes of data.
64 bytes from kookaburra.cbr.hosting-server.com.au (203.88.118.177): icmp_seq=1 ttl=57 time=36.6 ms
64 bytes from kookaburra.cbr.hosting-server.com.au (203.88.118.177): icmp_seq=2 ttl=57 time=36.5 ms
64 bytes from kookaburra.cbr.hosting-server.com.au (203.88.118.177): icmp_seq=3 ttl=57 time=37.0 ms
64 bytes from kookaburra.cbr.hosting-server.com.au (203.88.118.177): icmp_seq=4 ttl=57 time=36.9 ms
64 bytes from kookaburra.cbr.hosting-server.com.au (203.88.118.177): icmp_seq=5 ttl=57 time=36.6 ms

— itresource.com.au ping statistics —
5 packets transmitted, 5 received, 0% packet loss, time 9000ms
rtt min/avg/max/mdev = 35.918/36.638/37.106/0.400 ms

Mac OS X
ping -c 10 itresource.com.au

PING kookaburra.cbr.hosting-server.com.au (203.88.118.177): 56 data bytes
64 bytes from 203.88.118.177: icmp_seq=0 ttl=53 time=40.019 ms
64 bytes from 203.88.118.177: icmp_seq=1 ttl=53 time=47.502 ms
64 bytes from 203.88.118.177: icmp_seq=2 ttl=53 time=43.208 ms
64 bytes from 203.88.118.177: icmp_seq=3 ttl=53 time=50.851 ms
64 bytes from 203.88.118.177: icmp_seq=4 ttl=53 time=46.556 ms

— ping statistics —
5 packets transmitted, 5 packets received, 0% packet loss
round-trip min/avg/max/stddev = 40.019/45.575/50.851/3.588 ms

Useful links:
http://en.wikipedia.org/wiki/Ping

http://www.computerhope.com/jargon/p/ping.htm

Quick post to tell you about a very useful site (recently ‘wiki-fied’ covering free software for business, development and home use. There seems to be a lot of useful stuff in there and it’s pretty active as well…well worth a look:

It can be found here – Gizmo’s Tech Support Site

A quick note to warn you that the first code sample has been released to try and exploit the recently announced DNS cache poisoning vulnerability. While most users will be relying on their ISP etc to ensure they have patched the hole, you should also make sure that you have applied any required OS patches/updates (e.g. Windows MS Security Bulletin  MS08-037).

Also – you should note that while attackers may be able to redirect you to a bogus IP, they will not be able to replicate a digitally trusted security certificate. So if you go to your online banking site and see that you are on an ‘http’ page or if you get the IE7 warning page about untrusted/mismatched certificates then you should be careful. Of course, many sites use Shared certificates so it is quite common to see this warning message but you shouldn’t expect to see it when using online banking or similar.

Acer Australia has recently launched the Aspire One, its first 8.9″ Netbook. Powered by the latest Intel Atom processor, Aspire One is an internet device designed to make online activities fast, simple and convenient.

Aspire One features an 8.9″ CrystalBrite LED backlit display (resolution of 1024×600 pixels), CrystalEye webcam and 802.11b/g WiFi built-in as standard for access to available wireless networks.

Aspire One will be available with Linpus Linux Lite or Windows XP Home, and comes with 512MB or 1GB of memory respectively. There are two alternatives for data storage: a NAND flash module of 8GB or an 80GB internal HDD. In addition the Aspire One reads 5 different types of memory card.

The bundled OneMail application integrates up to five email accounts into one central inbox. Similarly, users can have multiple instant messenger accounts via a single point of access.

Available in a range of colours, the Aspire One has a RRP of $599AUD (linux version).

• Linux version weighs less than 1kg
• Windows XP version weighs 1.1kg
• Up to 3 hours battery life with standard 3-cell battery
• Up to 7 hours battery life with optional 6-cell battery

Research in Motion, makers of the Blackberry, has warned businesses to disable the function which allows a BlackBerry to read PDF files, after a security flaw was found in the software.

A “high” severity flaw affecting how BlackBerry Enterprise Server (BES) opens PDF files may be used to compromise a network. RIM disclosed the flaw last week but is yet to issue a patch, stating that no timeframe for a fix was available.

Until then, customers asre advised to disable the BlackBerry Attachment Service, which allows BES to process PDF attachments for users to view on their BlackBerry devices. The flaw relates to how the service processes PDF files, which can be exploited via a maliciously crafted PDF.

Vulnerable systems include BES software version 4.1 Service Pack 3 (4.1.3) through to 4.1 Service Pack 5 (4.1.5). RIM has given the advisory a “high” severity rating.

“If a BlackBerry smartphone user on a BlackBerry Enterprise Server opens and views the specially crafted PDF file attachment on the BlackBerry smartphone, the arbitrary code execution could compromise the computer,” RIM states on its advisory.

According to Sense of Security’s principal consultant, Jason Edelstein, this means that corporate networks are at risk due to the flaw. Most organisations place the BES within key networks, such as email servers, giving it privileged access to other computers on that network.

“Most organisations put the BES on an internal server on the network, which actually is a conduit between the internal server and RIM’s servers based in Canada,” he said.

“If someone loses their device and it’s not locked in some way, you could browse internally to that company’s Web-based resources,” he said.

“The way the end user can determine if they are vulnerable is to try to open the browser on the BlackBerry and attempt to access your intranet resources — if it comes up on the BlackBerry and you know it’s not published on the internet, that should raise alarm bells.”

Blackberry/RIM Knowledgebase article

Australian research scientists have made a radical breakthrough that could dramatically increase the speed of the optical networks at the core of the internet.

The Sydney University based Centre for Ultra-high bandwidth Devices for Optical Systems (CUDOS) team, led by Ben Eggleton, has created a switch embedded in a silicon chip. The chip uses scratches on a glass surface to direct optical traffic at speeds of up to 640 gigabits per second.

Traditionally, switching network traffic means converting it from light into electrical signals and then back again. However, with the massive speeds now used in backbone networks, such an approach is becoming a bottleneck. The new switch opens up the prospect of multi terabit-per-second speeds.

Eggleton says “The switch chip essentially uses one beam of light to control another. The scratches create a photonic circuit that does the job traditionally done by electronics”. The circuit will guide data in much the same way as trains are guided from one track to another.

Just as potentially impressive as the operating speed is the simplicity and potential cheapness of the design. This should eventually allow it to be incorporated into a wide variety of equipment.

The CUDOS team has worked with other researchers at the Australian National University and the Technical University of Denmark on the project. A proof of concept chip is currently under evaluation in Europe.

Find CUDOS here

The ongoing Google/YouTube-Viacom litigation has now officially spilled over to users with a court order requiring Google to turn over massive amounts of user data to Viacom.

That data includes every YouTube username, the associated IP address and the videos that user has watched on YouTube. Google will also be required to hand over copies of every video removed from Youtube for any reason. Stanton dismissed Google’s argument that the order will violate user privacy, saying such privacy concerns are merely “speculative.”

Meanwhile, the judge denied Viacom’s request that Google turn over YouTube’s source code.

It seems that far more data is in danger of being transferred than is required to satisfy Viacom’s core stated concern, which is to understand the popularity of copyright infringing vs. non-infringing material. Viacom has asked for much more than that, opening up the possibility of their taking legal action to sue individual users (or at least use the threat of a lawsuit) who have watched ‘copyrighted’ material on YouTube.

Telstra has failed to meet Sol Rujillo’s June 30 deadline for completing the migration of 5 million users to a new billing system, despite its claiming less than four months ago that the multi-million-dollar overhaul would be complete on time.

Mr Trujillo told analysts at Telstra’s half-yearly results in late February that the migration was “on plan” and that he would reveal whether the telco had “hit” its goal of completing the migration by the end of the 2007-08 financial year during full-year results in August.

However, a Telstra representative confirmed yesterday that progress was “satisfactory”, but that the migration of customers was still ongoing, despite the deadline.

The failure to meet the deadline is likely to see Telstra forced to continue pumping funds into running the legacy system as well as the new platform.

Telstra has not revealed any details of how many customers have already been migrated to the new billing platform.

Internet users will now have an easier time finding sites that rely heavily on the popular Flash video format.

Adobe Systems, owner of Flash, has released a customised version of the Flash Player software that will allow Google (and other search engines) to see certain elements of Web pages embedded with Flash content in the same way a human would.

Search Engines currently have a difficult time “seeing” non-text formats such as Flash, which can lead to sites that make heavy use of the technology being ‘penalised’ in terms of their indexing.

Adobe’s new tool will help crawlers navigate dynamic Flash pages more easily. Google’s crawlers, for instance, will be able to click buttons along the way and remember the information for the index.

Google is already using the new tool and Yahoo plans to soon. Adobe also plans to extend support to other search engines.