dns zone – How to let users mask domain for whit label?

We provide white label services to the users, where users can use our app on their domain by masking our sub-domain by cnaming to app.domain.com. I want the user to mask the subdomain (app.domain.com). How can we do it?

Can we do with DNS, php, .htaccess or HTML ?

Do you have to leave Schengen zone to validate a new Schengen visa after marrying to an EU citizen?

First, let me say that you have omitted two critical facts: Does your future husband reside in Germany? Do you plan to settle with him there?

If the answer to both questions is yes, then your presence in Germany would be subject to German national immigration law, which is somewhat more restrictive than the EU’s free movement provisions. You would still benefit from the EU’s free movement law when you are in EU and Schengen1 countries other than Germany.

Do you have to leave Schengen zone to validate a new Schengen visa after marrying to an EU citizen?

In general, no. If you’re planning to settle in Germany, however, you would need to comply with German law, and I do not know precisely what it has to say about this. There are several countries whose citizens may in general apply for residence permits in Germany without first getting a visa. I do not know for certain whether this applies to family visas, but if it does then you should not need to leave the Schengen area. A citizen of Mexico, on the other hand, probably would need to do that. (The countries are the USA, Australia, Canada, Israel, Japan, New Zealand, Switzerland, and South Korea; see Residence Visa / Long Stay Visa on the German government site.)

Once we get married, is it better to leave the Schengen zone and re-enter and present our marriage certificate?


I’ll be ‘joining’ him as a spouse of an EU citizen. I believe this will make us be free from tied to the 90/180 Schengen rule.

That’s true, unless your husband resides in Germany. In that case you will be free from the 90/180 rule in every Schengen country other than Germany. In Germany, your presence would be governed by German domestic law, so you would need a residence permit to exceed the 90/180 rule.

In other visa types, I know if you change the status of your visa (ie. Student visa to work visa) you have to leave the country and re-enter the country with a fresh stamp.

That’s not actually true. Different Schengen countries have different views of that, but there’s nothing in the Schengen regulations that requires it. Regardless, once you’re married, the Schengen regulations will no longer apply to you for the purpose of regulating your stay when you’re traveling with your husband in the Schengen area (except, if your husband resides in Germany, when you’re in Germany).

Instead, you will enjoy a derivative right to accompany him as he exercises freedom of movement anywhere in the EU or the Schengen area (except for Germany if he resides there). That right flows from the EU treaties, not from any document such as a visa. As a citizen of South Korea, you don’t need a visa for that purpose, and there is certainly no need to “validate” a visa you don’t have, nor to validate anything else, by leaving and re-entering the Schengen zone.

The obligation you will have, if you settle with your husband in a country other than Germany, will be to register there if it is required by domestic law. If you want to settle with your husband in Germany then you will need to apply for a residence permit under German immigration law.


  1. Strictly speaking, free movement applies in EU and EEA countries plus Switzerland. All the EEA countries and Switzerland are in the Schengen area, and it is somewhat more convenient to say “EU and Schengen” than to say “EU and EEA countries and Switzerland.”

cellphones – Is it possible to buy a SIM card in a transit zone of Doha airport?

The Doha Airport’s official webpage contains a link to a page of maps of the various terminals and concourses.

The maps for Transit Concourses A, B, D, and E show various facilities (seating, restrooms, customs/immigration desks, etc.) but do not show any shops or stores in these areas.

There is no map for a Transit Concourse C, which may or may not exist. I’ve never been this airport.

domain name system – Remove orphaned named host in DNS TrustAnchors Zone

Our SCOM service is encountering a timeout when running Resolve-DNSName -Server -Type NS -Name TrustAnchors. -DnsOnly. We’ve identified the cause as a record for a server that no longer exists. We currently have 5 DNS servers set up and DNSSEC is enabled on all but our primary. No further steps were taken to enable DNSSEC (no trust points were set up and no zones were signed). We are unaware of the orphaned server ever being set up as a DNS server (it’s intended use was a file share/print server). There was no indication that the server was set up as a DNS server when we decommissioned it. When we removed the AD object, there was no prompt stating it was a DNS server or domain controller. We went through all the steps we could find to remove an orphaned domain controller and DNS server and no luck. The orphaned computer does not exist in ADUC and site & services. Running Remove-DnsServerTrustAnchor in powershell returns a Remove-DnsServerTrustAnchor : Failed to enumerate the trust anchors for the input trust point ORPHAN on server DC.. We get a successful output when attempt a remove with dnscmd /recorddelete TrustAnchors ORPHAN NS but it’s not removed. What steps can we take to remove the orphaned Named host from the TrustAnchors DNS zone.

If my domain name DNS’s SOA Serial is 1 and never changes, will zone updates still propagate in a timely way?

The primary purpose of the SERIAL field in the SOA is indeed to allow secondary nameservers to determine whether they should initiate a zone transfer because the zone has been updated. If you sync your zones via some other method, then this is not relevant and the SERIAL can be pretty much whatever.

The SERIAL is not involved in any way in authoritative queries for records from arbitrary clients on the network. The TTL of the requested record is considered in this case, by the server that receives the query.

There is a corner case, though: If you use DNS UPDATE messages (RFC 2136) to update the SOA record, the SERIAL must be higher than the previous SERIAL or the update will be ignored.

In Views, when using a filter on a datetime field, what is the time zone of the offset?

When I use an offset like “-4 hours” in a Views filter on a datetime field, which timezone is used?

More details

In Views, when I add a filter for a datetime field, I get the following options for Value type:

  • A date in any machine readable format. CCYY-MM-DD HH:MM:SS is preferred.
  • An offset from the current time such as “+1 day” or “-2 hours -30 minutes”

On my site, users can set their own timezones. (/admin/config/regional/settings Users may set their own time zone)

So there are potentially three timezones in play:

  • In the database, the strings for datetime are stored in the UTC timezone
  • The site timezone is set to Tokyo
  • The user timezone is set to Berlin

So, which of these timezones does the offset use?

trains – Do I need to disembark when crossing a Japan Rail pass zone boundary?

Say I have a JR West Kansai–Hiroshima Area Pass, which covers travel between Kurashiki and Sōja, and I take the train from Kurashiki to Izumo(shi), which goes through Sōja.

Is it necessary that I either disembark and exit ticket gates at Sōja (where the pass’s validity zone ends) or buy a full ticket from Kurashiki to Izumoshi?

Or can I buy a fare ticket from only Sōja to Izumoshi, embark at Kurashiki, ride all the way to Izumoshi, disembark and talk to station staff at Izumoshi to let me out (explaining that the Kurashiki–Sōja section is covered by my pass)? Can I assume that automatic gates won’t work because I can’t activate the ticket at Kurashiki?

Do the same rules apply to limited express tickets?

visas – Travelling from Europe to US while avoiding the Schengen zone ban

I am going to apply soon for a US visa while currently being in the Schengen Zone (Germany). I am not a EU citizen but currently here on a work permit. I want to travel to US to continue my employment in the US. Currently, there is a ban on travel to US from Schengen countries. Assuming that I get my visa soon (it is not under the banned categories), what are the ways for me to fly back to US?

For example, I am thinking to travelling to Croatia or Serbia, staying for 14 days in a quarantine there and then flying to US because I think I can travel to these countries with my National D Visa/Work Permit while these countries are not in the Schengen zone.

What would be your advice? I am also a bit afraid of getting stuck in the e country and not being able to go back to Germany if there are some unknown rules prohibiting me from flying back to US.

oracle – Language setting for ‘TZD’ format in TO_CHAR (timestamp with time zone)

You can get the TZD abbreviations with this query:

SELECT tzabbrev, tzname, TZ_OFFSET(tzname) 
WHERE tzname = 'America/Edmonton'

----------  ------------------  ------------------
LMT         America/Edmonton    -06:00
MST         America/Edmonton    -06:00
MDT         America/Edmonton    -06:00
MWT         America/Edmonton    -06:00
MPT         America/Edmonton    -06:00

I think they are fix and you cannot change it. Note, for time zone abbreviations there is no common or official standard, for every time zone you will find dozens of abbreviations, see https://www.timeanddate.com/time/zones/na.

If you need a language specific output you could use CASE or DECODE

DECODE(to_char(systimestamp at TIME zone 'AMERICA/EDMONTON', 'TZD'), 'MDT','HNR' ,'HAR')

FREERADIUS: How can the same user have logged in to two controllers (Zone Director and Virtual SmartZone) at the same time?

How can the same user have logged in to two controllers (Zone Director and Virtual SmartZone) at the same time?

FreeRADIUS Version 2.2.3
Virtual Smartzone High Scale:
Zone Director ZD3025: build 105

We were migrating the APs from ZD to VSZ, but as the pandemic emerged and everyone is at home now, we stopped the migration and the two controllers are in operation.

In the corresponding radacct of each controller, I found the chronological order:

Tue Jun 9 09:47:11 2020
Acct-Session-Id = “5EDF8325-2E943C01”
Acct-Status-Type = Start
Acct-Authentic = RADIUS
User-Name = “x”
NAS-IP-Address = IP_VSZ
NAS-Port-Type = Wireless-802.11
Connect-Info = “CONNECT 802.11b/g/n”
Event-Timestamp = “Jun 9 2020 09:40:07 -03”
Ruckus-SSID = “Y”

Tue Jun 9 09:48:45 2020
User-Name = “x”
Acct-Status-Type = Start
Acct-Authentic = RADIUS
NAS-IP-Address = IP_ZD
NAS-Port-Type = Wireless-802.11
Connect-Info = “CONNECT 802.11g/n”
Acct-Session-Id = “5C108A3D-0458941E”
Acct-Multi-Session-Id = “2ce6cc39d168687d6b0eb2b35edf852cc33a”
Ruckus-SSID = “Y”
Event-Timestamp = “Jun 9 2020 09:48:45 -03”

Tue Jun 9 09:55:40 2020
User-Name = “x”
Acct-Status-Type = Stop
Acct-Authentic = RADIUS
NAS-IP-Address = IP_ZD
NAS-Port-Type = Wireless-802.11
NAS-Identifier = “2C-E6-CC-39-D1-68”
Connect-Info = “CONNECT 802.11g/n”
Acct-Session-Id = “5C108A3D-0458941E”
Acct-Multi-Session-Id = “2ce6cc39d168687d6b0eb2b35edf852cc33a”
Ruckus-SSID = “Y”
Event-Timestamp = “Jun 9 2020 09:55:40 -03”
Acct-Terminate-Cause = Idle-Timeout T
imestamp = 1591707340

Tue Jun 9 10:08:06 2020
Acct-Session-Id = “5EDF8325-2E943C01”
Acct-Multi-Session-Id = “743e2b370028d077146daa375edf8325ba1a”
Acct-Link-Count = 1
Acct-Status-Type = Stop
Acct-Authentic = RADIUS
User-Name = “x”
NAS-IP-Address = IP_VSZ
NAS-Port-Type = Wireless-802.11
Connect-Info = “CONNECT 802.11b/g/n”
Event-Timestamp = “Jun 9 2020 10:01:02 -03”
Ruckus-SSID = “X”