Root Access

DavidPostill

09:01

@Bob what do you mean by safe?

SilverLight

Nice picture

@Bob

So sorry, But really interesting

Gypsy Spellweaver

@SilverLight There is only one real, public IP, so just call that 1.1.1.1, whatever it is, and then for the private network, just use the last two, as in ..100.2

Bob

@DavidPostill unlikely to be rejected by "most" websites

that's the problem

there isn't really a good way to ask the question

nor a good answer

Gypsy Spellweaver

@Bob Simple answer, ASCII

Bob

@GypsySpellweaver wrong answer, + is often rejected

that's why this is so hard, with so many overly-restrictive filters -_-

Gypsy Spellweaver

09:06

@Bob So is my email address me_@_my.name

DavidPostill

343

Q: What characters are allowed in an email address?

I'm not asking about full email validation. I just want to know what are allowed characters in user-name and server parts of email address. This may be oversimplified, maybe email adresses can take other forms, but I don't care. I'm asking about only this simple form: user-name@server (e.g. wild...

Gypsy Spellweaver

Well, that didn't format right. The idea is that .name is rejected by bad regex tests.

Bob

@DavidPostill yea, that's the hard technical answer - what characters the standard allows

My 'question', totally unsuitable for SU main, was 'what characters will probably work for some <unknown> high percentage of websites'

waaaaaaaay too vague

SilverLight

Here is A system interfaces in HOST-ONLY mode :

Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . :
Link-local IPv6 Address . . . . . : fe80::…
IPv4 Address. . . . . . . . . . . : 23...7
Subnet Mask . . . . . . . . . . . : 255.255.255.192
Default Gateway . . . . . . . . . : fe80::…
23....1

Ethernet adapter VMware Network Adapter VMnet1:
Connection-specific DNS Suffix . : localdomain
Link-local IPv6 Address . . . . . : fe80::857b:2d5e:f461:faa2%16
IPv4 Address. . . . . . . . . . . : 192.168.150.1
Subnet Mask . . . . . . . . . . . : 255.255.255.0

Bob

and then you have the horrible sites that go "no public hosts (gmail, etc.)"

and the equally horrible sites that go "only public hosts (gmail, etc.)"

...I've seen both.

Gypsy Spellweaver

09:09

Safe [a-zA-Z][a-zA-Z0-9]* anything else might get rejected by idiot "regex gurus"

DavidPostill

@Bob I like this answer:

5

A: What characters are allowed in an email address?

The short answer is that there are 2 answers. There is one standard for what you should do. ie behaviour that is wise and will keep you out of trouble. There is another (much broader) standard for the behaviour you should accept without making trouble. This duality works for sending and accepting...

SilverLight

Here is B system interfaces in HOST-ONLY mode :

eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.150.128 netmask 255.255.255.0 broadcast 192.168.150.255
inet6 fe80::ad5f:… prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:c4:fc:23 txqueuelen 1000 (Ethernet)
RX packets 17 bytes 2903 (2.8 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 18 bytes 1852 (1.8 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
device interrupt 19 base 0x2024

lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0

In A system we can ping 23...40

Gypsy Spellweaver

@SilverLight (B) has to ping (A) using 192.168.150.1

SilverLight

Now in B system How can i ping 23...40?

Or how can i send packet to it?

Gypsy Spellweaver

(A) pings (B) at 192.168.150.128

SilverLight

09:13

As you see these ips are private

A can see B & B can see A

Gypsy Spellweaver

Sometimes (B) can ping (A) at 23...40, but that's up to the router wether or not to allow it.

Lots of routers won't let internal machines see others using the public IP.

SilverLight

In A this works : ping 23...40

Bob

@DavidPostill Ah, yea, I like it too :P

Robustness principle

In computing, the robustness principle is a general design guideline for software: Be conservative in what you do, be liberal in what you accept from others (often reworded as "Be conservative in what you send, be liberal in what you accept"). The principle is also known as Postel's law, after internet pioneer Jon Postel, who wrote in an early specification of the Transmission Control Protocol that: TCP implementations should follow a general principle of robustness: be conservative in what you do, be liberal in what you accept from others. In other words, code that sends commands or data to other...

SilverLight

But in B : ping 23...40 > FAILED

Gypsy Spellweaver

(A) knows that it is 23...40 and don't send it out. when asked.

Bob

09:15

@DavidPostill Except that lists + as acceptable. Which it should be but all too often isn't.

Gypsy Spellweaver

Does (B) ping 192.168.150.1 work?

Bob

In practice? I've found . works most of the time. - seems to work but I've not used it in many places yet.

There was that one time I found a regex that broke ., so too bad to all the [email protected] users!

SilverLight

"Does (B) ping 192.168.150.1 work?" yes, works

DavidPostill

85

Q: What are the security reasons for disallowing the plus sign in email addresses?

My question is based on this tweet after I commented about forbidding + symbols in email addresses. The tweet says, "This is a measure we've taken for security reasons." This can be frustrating and inconvenient for people that have (or use) plus signs in their email address, and I'm sure web sit...

email

Bob

I'm just waiting for the day I discover a site that rejects digits in the address...

Gypsy Spellweaver

09:18

That's the only way that (B) talks to (A). And (A) ping 192.168.150.128 should be the only way that (A) talks to (B).

SilverLight

Also in A : ping 192.168.150.128 works too

Ok,Now A , B see each other

In A(23...7) can ping 23...40

Gypsy Spellweaver

@SilverLight Now the big test. Can (B) ping 4.2.2.2 ?

SilverLight

nope > FAILED

Gypsy Spellweaver

@SilverLight And what is 23...40?

SilverLight

That 40 system is in A network

But in A ping 4.2.2.2 works

Gypsy Spellweaver

09:21

Ah, OK. Didn't know where the second 23...x was coming from

SilverLight

I've installed a vmware inside a vps

All hosts in main server are : 23...x

And can see each other

vmware inside vmware :-)

Gypsy Spellweaver

Try switching from host only to NAT, and check to see what ip is given, then try ping tests again. VMWare might make host only not see outside the virtual network, not a heavy Windows user, so not sure about that part.

SilverLight

But i didn't tell that because of simplicity my question. Ok.

Gypsy Spellweaver

You may have to do extra steps in (A). Might have to go to the network connections in Windows Explorer and "bridge" the 192.168.150.1 and 23...7 interfaces.

The extra layers shouldn't matter, since 23...7 can ping 4.2.2.2

Can 23...40 also ping 4.2.2.2?

SilverLight

Can 23...40 also ping 4.2.2.2? yes

Gypsy Spellweaver

09:27

Then the VM in VM shouldn't matter.

Because you have VMWare, I'm thinking it is a Window Host, correct?

SilverLight

I am switching on NAT mode

yes

Host is windows server 2008 r2

In NAT mode : In system A & B

ping 4.2.2.2 works

Gypsy Spellweaver

I haven't been active in Windows use heavily since XP, now use linux

So somewhat unsure of the rules for VMWare.

I use VirtualBox instead.

SilverLight

Your bridge mention about 23...7 & 192.168.150.1 was a good idea

Wait

I am in NAT Mode

Here is the information :

w8

Here is A :

Windows IP Configuration
Ethernet adapter Local Area Connection 2:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . :
Link-local IPv6 Address . . . . . : fe80::…
IPv4 Address. . . . . . . . . . . : 23...7
Subnet Mask . . . . . . . . . . . : 255.255.255.192
Default Gateway . . . . . . . . . : fe80::…
23.92.213.1

Ethernet adapter VMware Network Adapter VMnet1:

Connection-specific DNS Suffix . :

ping 4.2.2.2

Works on both A & B

Gypsy Spellweaver

Yipee! (B) now has internet.

SilverLight

yes

Gypsy Spellweaver

09:40

Does (B) ping 23...40 work?

SilverLight

Jesus

yes

But can see that system

Gypsy Spellweaver

Now you can write the answer to your question.

SilverLight

From the internet

I can ping 23...40 from my local machine

Not in VMWares

That is why i confused

Gypsy Spellweaver

That's the tricky part. You will have to tell (A) 23....7 to forward anything on port(x) to 192.168.96.130

SilverLight

What is the command?

Or in VMware how can i configure this part?

Gypsy Spellweaver

09:44

If (B) is web server, for example, then (A) has to forward all port 80, maybe 443, to 192.168.93.130

That is something (A) has to do, not VMWare.

SilverLight

I was looking for this part

Gypsy Spellweaver

And, in Windows, that command I don't know.

But the rest had to work before that command could be used.

SilverLight

SO in linux send/receive packets should be like this :

Send Packet from 192.168.93.130 to 23...40

And there should be a port forwarding in A system

To transfer data to B

Am i right?

Gypsy Spellweaver

Yes, I believe so, if I understand that part correctly. You want (B) to communicate with 23...40 both ways?

SilverLight

Yes

Send Receive some TCP packets

Between public & private ips

Gypsy Spellweaver

09:50

Then in (A) you will need to use the netsh command. For the answer, hopefully, look at stackoverflow.com/questions/11525703/port-forwarding-in-windows

Using that command it will not matter if the packet comes from 23...40 or your home, or my computer, it will go to (B) if it is on the right port.

SilverLight

But what was that bridge you tell before, When we were in HOST-Only mode?

Gypsy Spellweaver

(B) can send directly to any public ip already.

That was a possible work around, with more issues than results in this case.

SilverLight

Between interfaces

Love you man

Gypsy Spellweaver

The problem with Host-only is that VMWare makes it Host only, so that (B) can see (A) and nothing else.

SilverLight

right

Gypsy Spellweaver

09:54

That's fine, as long as that is what you want, or that you know that's what it means.

SilverLight

I should test port forwarding - Last shot

imdb.com/title/tt0357054

:-)

Gypsy Spellweaver

I'm going out on a limb here, but I think the command to give (A) is like this:

netsh interface portproxy add v4tov4 listenport=80 listenaddress=23..7 connectport=80 connectaddress=192.168.93.130

That's for a web server. Port numbers change for what it really is.

SilverLight

In every reset should i enter this command again?

in A system?

Gypsy Spellweaver

I think is should be saved, and survive a reboot. But, I don't know if the addresses will survive resets. You probably should dig into the setup for (B) and (A) and make the addresses static. Testing all the way of course.

I think to stop the forwarding you would have to give (A) a new command:
netsh interface portproxy delete v4tov4 listenport=80 listenaddress=23..7

SilverLight

Thanks dude...

I will set static ips

Is there any reference(s) about that bridge between two interfaces?

In my area some people bit each other under a real bridge

Jesus

Gypsy Spellweaver

10:03

I'm sure there's one or two questions on Super User about it.

SilverLight

Like finding gold in a desert

Gypsy Spellweaver

I think you mean the byte each other under a bridge :D

Rahul2001

Hi

School was exhausting

But my girlfriend is in my class and sits next to me now :D

SilverLight

bite :D

DavidPostill

@Rahul2001 :)

Gypsy Spellweaver

10:06

@SilverLight In any case, you're welcome. Now write up a really nice answer, get some upvotes and collect some reputation :D

SilverLight

Ok

Thanks

Gypsy Spellweaver

And, no, I did mean byte, as in a double nibble and half a word.

user226528

@Rahul2001 Good for you. Now, I hope you are not planning on pulling a prank on this one. Also, know that being a girl, she is probably watching you very carefully, so be on your best behavior.

Rahul2001

@FleetCommand This is the one that I played the prank on. She actually took it pretty well. Eleventh grade just started for us, and now she's in the same class as me.

user226528

I personally find being in the same class with a girlfriend is frustrating.
They are always watching.
They are always judging.
Losing a score in class is like losing a hundred in their book.

Gypsy Spellweaver

10:13

Well, I think that's settled. @FleetCommand and @DavidPostill, did that networking issue get handled properly?

Rahul2001

@FleetCommand Doesn't work like that for us. We have a lot of fun, and don't really judge each other. We're both brilliant at different subjects and not so good at others, doesn't really matter, we help each other out.

user226528

@GypsySpellweaver Masterfully done.

Gypsy Spellweaver

Wish I knew more about what I was doing :/

user226528

@Rahul2001 You can't see the act of judging. You can only see the consequences when it is too late.

bertieb

Oh my

General Election

Gypsy Spellweaver

10:16

Guess all those hours on the phone with mom helped me at doing Back Seat Tech

@bertieb What are you running for?

user226528

Head of the general assembly perhaps?

bertieb

@GypsySpellweaver My life!! aaaaahhh

:P

Gypsy Spellweaver

House of Commons seat per chance?

bertieb

Terrible job :P

Shouldn't really bring up politics in here, but it kinda jolted me

user226528

Yeah. Don't.

bertieb

10:22

I've heard that before somewhere...

DavidPostill

@GypsySpellweaver Almost. You could have created a room for the two of you ... :)

Gypsy Spellweaver

@DavidPostill Do I have enough rep to do that? How do you do that?

DavidPostill

@GypsySpellweaver Go to chat.stackoverflow.com scroll to the bottom and click "create a new room". I think it requires 101 rep. Then invite other person to join you in the room.

Gypsy Spellweaver

@DavidPostill Do rooms created that way survive the exit of both, all, parties?

Burgi

ooooh!

general election

DavidPostill

10:31

@GypsySpellweaver Yes. Eventually they get closed as inactive, but can be reopened by a mod or the room owner (I think)

Feb 4 at 23:01, by DavidPostill

Jan 30 at 3:40, by Journeyman Geek

oh, and for the record, there isn't a blanket ban on politics here. I refrain from it cause its so darned dreary a topic. Just remember that MSE post, and keep it civil, and don't link things primarily cause you know it'll cause drama.

Burgi

welp she is going to win

Gypsy Spellweaver

@Burgi Not you too. You gonna be the next general assembly person?

Burgi

labour are rubbish

lib dems are not there any more

and UKIP..... LOLOLOLOLOLOLOLOL

@DavidPostill you should stand!

you won the last election by a landslide

DavidPostill

@Burgi LOLOLOLOLOLOL

Burgi

;)

bertieb

10:35

@DavidPostill You'd have my vote!

There was that Serbian satirist in a white suit who seems to have shaken up things there

So it wouldn't be entirely unthinkable

djsmiley2k

11:04

lol the pm is doing a brexit

the most selfserving general election ever

if they win, she'll stay on right, and have the ability to not have the election for 4 years hense?

Burgi

it would be hillarious if she lost

djsmiley2k

11:23

yah

Oliver Salzburg

@Burgi Was that ll intentional?

Burgi

@OliverSalzburg yeah, i'm just bad at speeling

Oliver Salzburg

So, was that a poke at Hillary?

jokerdino

no it was not.

Some pokes are accidental.

Oliver Salzburg

And some are genius yet subtle and go unnoticed by the general public

Journeyman Geek

11:35

dog's home

He's groggy and slightly high, and had 7 teeth removed.

Burgi

are you talking about your roomie or @Dog?

Bob

man apt.conf and man apt_preferences

Journeyman Geek

@Burgi the roomie. ;p

Bob

because of course having consistency in your manpage naming would be too hard

Journeyman Geek

@Dog had rarely gotten me pissed off enough to actually bother to loosen his teeth.

Roomie has some rotten teeth and a little abcess.

user226528

11:39

@JourneymanGeek This roomie of yours, what kind is it?

Journeyman Geek

@FleetCommand I thought I explained it today ;p

@FleetCommand <----

user226528

@JourneymanGeek I meant the genre...

Journeyman Geek

"Roomie" refers to the canine. Human refers to the human, OOC of course ;p

Dogs have genre?

user226528

What's the word for it? Genus?

Journeyman Geek

Breed?

Mutt. Wauzer is close enough I suppose, he's a white schnauzer crossed with ????

user226528

11:43

Big, medium or small?

Burgi

grande

Journeyman Geek

hmm small size, huge personality

user226528

Is he large enough to chase cats?

Journeyman Geek

Used to back in the day

Burgi

cats are banned in SG

Journeyman Geek

11:46

@Burgi we have strays ;p

user226528

I like dogs. They don't like me.

Journeyman Geek

lol

user226528

A German shepherd dog once tried to attack me.

Journeyman Geek

lol

user226528

Is that funny?

Journeyman Geek

11:50

My cousin is has a GSD. They seem to like me.

ALso confused my brother for me, got embarassed, tried to hide under a sofa...

his head barely fit.

user226528

GSDs can kill a mature human

Journeyman Geek

They're also not very bright. Also depends on training.

user226528

How do you define a dog as bright?

Journeyman Geek

Good question

they are excellent dogs to train

but arn't the sort who think for themselves IMO

Oliver Salzburg

Journeyman Geek

11:56

But yeah environment determines how a dog reacts to things.

user226528

Well, the one that tried to attack me was quite impossible to fool.

Burgi

12:10

arstechnica.co.uk/science/2017/03/…

Bob

# apt --dry-run install snapd/stretch
Reading package lists... Done
Building dependency tree
Reading state information... Done
Selected version '2.21-2' (Debian:testing [amd64]) for 'snapd'
The following extra packages will be installed:
  apparmor libapparmor-perl libapparmor1 liblzo2-2 libseccomp2 snap-confine
  squashfs-tools ubuntu-core-launcher
Suggested packages:
  apparmor-profiles apparmor-profiles-extra apparmor-utils
The following NEW packages will be installed:
  apparmor libapparmor-perl libapparmor1 liblzo2-2 libseccomp2 snap-confine

hm, not so bad

expected a lot more packages from testing

Burgi

> I've been upgraded from chief executive to a much higher position. It's so high, I can't even see what's going on - Bernie Ecclestone

lol

which country was it where they pretended the dictator was still in charge but they had effectively sidelined him?

Journeyman Geek

@Burgi I read that as sequinned

Burgi

@JourneymanGeek who wouldn't want sparkly poo?

allquixotic

543,210 Dominoes - Dominoland - 3 Guinness World Records | 4K

►

Journeyman Geek

12:20

@Burgi I suppose it happens when one eats a vampire

Burgi

personally its why i eat a kilo of glitter daily ;)

Oliver Salzburg

Is anyone aware of a benchmark suite that specifically tests for software development workloads?

Bob

@OliverSalzburg Try loading Eclipse and time it :P

Phoronix might have one

Oliver Salzburg

@Bob Seems reasonable :D

@Bob Phoronix seems pretty neat. Will need to investigate

Bob

@OliverSalzburg openbenchmarking.org/suites/pts

> Phoronix Test Suite Suites

Department of Redundancy Department? :P

Oliver Salzburg

12:28

Sweet. I'll check that out. I already like the OSS aspect

...even though it's PHP

Bob

More here: openbenchmarking.org/tests/pts

TBH I don't think you'll get much more than compiler tests

Oliver Salzburg

I'm building a new system and I need to measure stuff now :P

Bob

Stuff like this openbenchmarking.org/test/pts/compilebench

user226528

I loathe being in charge of damaged goods, especially being held responsible for them not working.

Burgi

bbc.co.uk/news/business-39627135

allquixotic

12:40

I used Phoronix Test Suite quite a bit back in the old days

it's... fiddly

but what do you expect of a desktop app written in PHP

he codes his site in PHP, so he's probably too lazy to learn a different language for PTS

Bob

I took a look at it and went with sysbench instead :P

was easier

O_O transparent PNGs look amazing in a gravatar

Journeyman Geek

@Bob when they actually work

Bob

@JourneymanGeek works fine :)

Journeyman Geek

Bob

Anglish - What if English Were 100% Germanic?

►

Journeyman Geek

12:54

On the way home, less 7 bad teeth, and still a bit loopy

djsmiley2k

sounds like me xD

mean while I get to work

i'm the only other managed servie person on

one of only 3 2nd liners on too

this place is going to pot... concidering I'm getting job emails every day they need to sorti to ut.

Burgi

@Bob that avatar is floof with extra floof

@djsmiley2k how many more bodies do they need?

Bob

Burgi

@Bob You are suffering from ear hair floof

bertieb

@Bob Perhaps JG was referring to a recent meta post?

djsmiley2k

13:00

@Burgi about 10 first liners to start with

then 3-4 2nd liners

user226528

@Bob Is this a cat?

Journeyman Geek

@bertieb and others

Burgi

@FleetCommand its a fox! can you not tell with the "floof"?

user226528

@Burgi It looks like one of those poki-something to me.

user226528

Also a fox is not yellow.

Burgi

13:05

@FleetCommand i beg to differ

user226528

@Burgi This is fox is beige and brown. It is not yellow.

Burgi

yellow-ish

user226528

This is yellow-ish.

Burgi

no that is yellow

no "ish" about it

user226528

13:10

No, this is yellow:

user226528

jokerdino

o.O

Mods are censoring me!!1

bertieb

Which bit of this is off-topic?

-1

Q: Where do I find a graphics driver for my old HP Pavilion g6-1354er laptop on Windows 7 32-bit?

I failed to find it on https://support.hp.com When you are asked to choose the OS there are only these options in a drop-down list for my product (HP Pavilion g6-1354er): Windows 8 (32-bit) Windows 8 (64-bit) Windows 7 (64-bit) Or should I simply go for Windows 8 (32-bit) option? Would those...

windows-7 laptop drivers 32-bit

Is it looking for a 'service' (the drivers) ?

(It's not a product or a learning material request, insofar as I can tell so presumably it's that)

Bob

On The Turing Completeness of PowerPoint (SIGBOVIK)

►

Twisty

@bertieb It's look for software (drivers)

Bob

13:27

@Twisty That is not even remotely how the 'no software-rec' thing works.

Journeyman Geek

@Bob I personally don't like driver rec questions for the same reason one dosen't like software rec questions ;p

web pages change.

Bob

@JourneymanGeek Eh. I've always seen it more as an issue with being too opinion-based for recommendation questions.

This question leaves no room whatsoever for opinion.

Journeyman Geek

unrelatedly...

theverge.com/2017/4/18/15333954/…

Bob

The whole external resources thing is a whole other kettle of fish that affects just about every question/answer not involving pure theory.

Journeyman Geek

( meta.superuser.com/questions/3811/i-can-haz-driverz-kthxbai/… ) I personally hate the questions that much

Bob

13:32

@JourneymanGeek ...and both answers have good arguments to not blanket-ban them :P

Journeyman Geek

I never said it was site policy ;p

I said I personally didn't like em

Bob

IMO, reading this question - they did put in enough effort for it to not be a 'google for me pls' question

@JourneymanGeek the transparency looks really clean in the topbar too :P

Twisty

Hmmm...good information to consider. I'll admit I lean (perhaps too far) toward the "too localized" argument, but I see the need to evaluate on a case-by-case basis

Bob

@JourneymanGeek I wonder if we can abuse Discourse for chat? :P

bertieb

Aye, it's a tricky line to walk- it's tricky to answer for the general case, and mostly a link is what is required (which tends to lead to a less-than-desirable link-only answer); OTOH as per the meta QA, if someone has done some more-than-trivial searching an answer might help them and others (judging by accept rate)

All that being said, is it better to close as "too localised" (per meta) rather than "off topic" per se?

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