全家三口,除一票 IT 功能組別外,其餘五票跟戴耀廷雷動指示。一生人未試過在選舉上賭到咁大,天佑戴教授。勿笑,不喜勿插。完 !


Seagate 硬碟機, 永世都不會再買

Seagate 硬碟機,無論內置或可攜,永世都不會再買,送比我也不會要。講完!


Involved !

Don't use the word "involved" in your resume like "I was involved in managing the IT risks of an international bank". I could not guess what you were doing based on the word "involved". Please be specific. Got it????



政網 : 換特首 ! 我這一票比硬你了.



"Fuck" is not an offensive word so long as you know how to use it wisely. I use it more than 10 times a day.

Some people not even worth to be fucked or worth to fuck.  These people are all around at our workplace. Worth to fuck or worth to be fucked, that's the question I always ask.



In just half year, I've got 54 CPEs. It is not difficult for me to complete the remaining 66 CPEs in the coming two and a half years. So as I always say, the CPE mandate should not be seen as a hardship, rather it is a drive to excel ourselves to new insight.



Not more crazy complaint on this - IGMP traffic inside a network segment is not attack traffic. It is a form of legitimate traffic.


p=reject in DMARC policy

Give a big hand to Yahoo and Paypal for their "p=reject" in DMARC policy.

[root@localhost ~]# dig -t txt _dmarc.yahoo.com +short
"v=DMARC1\; p=reject\; pct=100\; rua=mailto:dmarc_y_rua@yahoo.com\;"
[root@localhost ~]# dig -t txt _dmarc.paypal.com +short
"v=DMARC1\; p=reject\; rua=mailto:d@rua.agari.com\; ruf=mailto:dk@bounce.paypal.com,mailto:d@ruf.agari.com"


Network Geek

Address and physical address can mean very different things in the minds of network geeks.


Goodbye Sendmail !

Goodbye Sendmail. You had been with me since 1998. Thanks for serving me for the past 18 years.  

Your rock stable performance should surprise the Internet technical community.  However, I need something more versatile, administrator-friendly and easy to debug.  


Bluetooth Tethering

I suppose all people who have multiple smartphones and tablets know how to do Bluetooth tethering.  This is important because WiFi tethering can not be done in some prepaid data cards.


misuse of high gain antennas

I want to kill myself for making a silly mistake. My ASUS router supports dual bands and 802.11ac. However, I use 8 dBi high gain antennas which suit the 2.4 GHz band only. While the signal strength in the garbage 2.4 GHz band is boosted to - 30 dBm, the 5 GHz signal strength is weakened significantly. That is why all my 802.11ac client devices perform poorly. I promise myself not to commit such mistake in future.


Netflix over IPv6

Neflix streaming content is delivered to my desktop PC over IPv6. Applaud, what a great technological mindset !



大件事,有重要資料存放於 encrypted notepad, 但忘記刷卡解鎖模式。記密碼、記 PIN、 記模式等太煩了,莫非所有涉及加密嘅應用程式都要用指紋解鎖或現創科局長所用嘅口水解鎖嗎?





IPv6 Forever

PCCW offers me a /56 prefix. At first, I thought it was /64 only. A bit of surprise. All my home PCs arenow  riding on IPv6 and also smartphones if the connection is via my home WiFi. From now on, I am accessing all major big websites (Google, Gmail, Yahoo, Bing, Youtube, Facebook etc) with IPv6 having IPv4 as fallback. Anyway, this comes to me a bit late.


Stupid remarks of 盧寵茂

I am  very pleased to spread the leaked out recording of the remarks by HKU Council Member盧寵茂 at the Council Meeting on 29 September.  Let all HK people judge how stupid 盧寵茂 is. Here it is.

And in the personal point of view that he is a good guy as many of the members have said. He is a good man. He has been working for the University for so long. This is the first impression for me that I should support him. But after looking at this and especially after the incident in July, I have some reservation. It is about his qualification. Professor CHEN has a very detailed analysis on the publication. You can look at it, for the last 15 years, he has produced less than 5 items output including factor and article, less than 5 a year and in some years for example, in 2008, he has produced only 1 item, 2011, 1 item only.

I know the number, quantity, is not the absolute measure, you have to see the quality as well. If I have an assistant professor with this kind of output, I will be very concerned, I would really say, hey, how can you reach the bar of the notion within the university, very strict criteria 4 + 4 for practical, 3 + 3 for non-practical, for promotion either up or out from an assistant professor to an associate professor. If my assistant professor give me a CV of 1 output per year, I would say, you are in trouble. In 6 years or in 8 years time, how many publications did you have in your CV? You can’t reach that bar.
(我明白產量並非絕對標準,也視乎質素。若然我屬下的助理教授只有這樣的產量,我會非常憂慮。我會說,你怎能符合港大"四加四"和"三加三"晉升為副教授的嚴謹要求? 若果我的助理教授的履歷只有每年一篇文獻,我會說,你惹麻煩了,在六至八年內你會有多少篇文獻? 你並不達標。)

But on that event, on that night we have been in the storm of Council meeting and subsequently my injury. And after the event, I didn't really see him showing any sympathy for the Council members, and in particular, I use myself as an example. I am a staff elected by all the other staff to take part. And i sustained and injured. From all the opinion that he has expressed, actually he's still putting the blame on the Council, he has never...i'm not saying I need his sympathy. But as a staff, i really feel if you are PVC (staffing) and if a staff member had an injury during an event like this, should you just keep on saying it's the Council's fault, that means it's my fault as well? So in a way he's telling the public, he's speaking out in public, including his 香港家書, that the fault remains in the Council...the suffering i encountered. That is my reserve.

But when I fell, all these people...I am not saying only the students, I know there are people outside the University, there is no doubt that the student lead the crowd in when I have this meeting. I was accused in so many media, so many articles, pictures to say that I am an actor, 插水, alright. I really feel very bad, I didn’t complain eventually and even when I was in the hospital and I talked to the media with my occupation in charge that I will kindly accept, "我唔追究D 學生". That’s my true belief because I feel very sad if those people in the room and outside were our students, I really feel ashamed. We have not done our duty well.

And in contrast, he put the blame into the Council members and including me as a staff member. I am really terrified that someone with this kind of... i don't want to extrapolate but I felt if someone ... i would say he's putting his political inclination into the university. Because of the difference in political opinions he may think that I am here to represent CY. I can tell you I am not a 梁粉. I came in with support of the staff members. I've never talked to CY. CY has never talked to me about this. but it seems that everybody there including Johannes Chan has labelled me as a 梁粉...and whatever I did, whatever I suffered, I deserved it.

There were 4 academic members on the Search Committee. I was qualified to make academic judgments. I have a lot of experience of making these judgments. There were 3 other academic members of the committee. So there were 4 ppl, 3 of them are not here to represent their views, so my job as a chairman is to represent their views. Academic credentials were considered, and were considered suitable. Council members may disagree. But I am not going to go back from the judgement made by the Search Committee.

As to a comment to the number of papers he published, I think it’s utterly irrelevant. There’s no job description that says you could have published certain number of papers or you’re not qualified for this role. The absolute number of papers published are not...quality and you can’t transfer from medicine into law because the publication requirements are different. So frankly the number of paper he published in the last 15 years I think is irrelevant.

So my comment on that is I think you’ve taken things very personally, and I think we should keep things to factual discussion, and the purpose of the candidate. There’s no requirement in the job description for the candidate to express sympathy otherwise for anybody who is injured. I think you are putting post-event facts into this particular context, so the … I can’t speak for the Search Committee, Search Committee hasn’t met since 27 May, I can only speak as a Council Member, the events that happened since the Search Committee’s paper was written on 27 May, there have been many things written and said, a lot of opinions, I prefer to stick to the facts. And the facts that the Committee has to consider were the qualification and suitability for the post. I’ve already said at the start of the meeting that it’s my view that whilst none of the outcomes are attractive, to my mind, there will be less damage done for the University by the acceptance of the nomination and become a......projection.



根據民建聯內部規則,輸了區議會選舉的黨員不能被提名參加立法會選舉,現懇請各大電子/網上 傳媒盡快為該名落選人制作紀念特輯,內容一定要包括立法會內出現的四字成語及 Tree Gun Style English


time belongs to the Earth, not technology !

Regarding the retention of leap second in UTC, I have no hope some concrete plans will emerge in 2023 leading to a future-proof reference time-scale. Assuming scientists and engineers are smart enough to accomplish their task, there is a need to allow 10 years for the transition. That is to say, leap second will continue to stay with us for at least 18 more years.

My view is that it is a waste of time to continue studies on this issue.  From 2000 to 2023, 23 years would have been used up.   My advice to scientists and engineers is given below:

"Time belongs to the Earth, not technology (時間是屬於地球的,而不是屬於科技的)"


leap second till 2023

Great news. ITU has just announced that the leap second will continue to be used until 2023 pending for a final decision. Between 2015 and 2023, scientists and engineers should fully study all possible technical options leading to a future-proof reference time-scale.