At home I used an old PC and setup a Ubuntu 16.04 with functional Nginx server. I am hosting a website which can be reached from outside when I am not home, i.e. not using my home WiFi:    Interestingly, when I am connected to VPN (given by my company), even being home and using my home WiFi the website can be reached.  Unfortunately when I am home, i.e. I am using my home WiFi then the website is not reachable. The router that I am using is Bell Home Hub 3000 and I properly setup port forwarding (saying properly since the website is functional). Previously I did the same thing with Rogers WiFi router and it was working just fine from home or from outside. But since I moved to Bell and used Bell Home Hub 3000 the problem started.  Thank you so much for your help to understand the reason why I am not able to reach the local server/website while being on local WiFi.  Advanced tools and settings:    Port forwarding:
I have a weird port forwarding problem. I tried to open my port 22 to the outside network. I was able to access it as long as I am not inside the LAN. I can access it from my office for example. But from within the LAN, I can access the port using the local ip, but I can't access the port using the external IP. It's as if the router is blocking the loopback. I've check all my router settings, turned off anything firewall/filtering related. Any ideas?
Also show "Add a comment for the author" selection when deleting/voting to delete an answer I'm aware that this only affects high rep users and mods, but nevertheless it would be nice if the following selection would appear when a user casts a delete vote on an answer.    If I am not mistaken, this only appears when casting delete votes from the review queues. I don't see a reason why this shouldn't also appear when casting a vote directly to the answer, instead of the (java script) alert with "Delete this post?".  Or in other words, the selection should always appear when a user does some kind of 'delete answer' action. How to install HPLIP on my Ubuntu to support my HP printer and/or scanner? Missing $ inserted If $g \circ f$ is surjective, show that $f$ does not have to be surjective? Suppose $f: A \to B$ and $g: C \to D$ are functions, and that $B ⊆ C$.  I need to come up with an example where $g \circ f$ is surjective but $f$ is not. I'm confused on how exactly to do that, but I understand that to show something is surjective you have to have the range of the function equal to the codomain of the function. Here's my attempt:  So if $g(x) = x^2$ with a codomain of $ℝ$, and $f(x) = \sqrt{x}$ with a codomain of $ℝ$, then $g(f(x)) = (\sqrt{x})^2 = x$. Since the range of this function and codomain are the same, this is surjective.  But, since $f(x) = \sqrt{x}$, its range is only $[0, ∞)$, which is smaller than its codomain of $ℝ$, meaning $f$ is not surjective. How does HOTP keep in sync? My understanding of  is that each password is unique and based on a counter.    $$PASSWORD = HOTP_1(K,C)$$  Where $C$ is an incremental counter.  What I wish to know, is how you keep the client and server in sync?  Looking at current systems (google authenticator), there appears to be no indication if the actual 'counter' number, but you can generate successive passwords at will.  What happens if, for example, the password you have generated uses $C = 5$, but the server is expecting $C = 3$?  Also, what is the 'integrity check' for?  Google cant seem to come up with a solution. I'd like to write something in the shape of this "coat of arms".    I'd like to have the text filling the coat but with a hole roughly in the shape of the sword. I know there is the \shapepar command to create paragraph shapes so I tried to , a patch for XFig that allows you to draw the shape you want but it never worked on my computer (Mac OS X). I also know I can build the shape by myself with shapepar syntax but it seems really complicated and I don't think I'll make a lot of shapes. So if anybody has ShapePatch working on his computer or knows shapepar syntax very well, could he give me the code? Using MySQL with Entity Framework Why did Aragorn and Theoden ride out at the Hornburg? In the Battle of the Hornburg from The Two Towers, Aragorn and Theoden say "We must ride out." Why did they do this?  Was it just a matter of honor? Did they ride out on their horses in the middle of battle because they thought it was the end, as they were outnumbered? Was it because Aragorn knew Gandalf was coming so they were confident they were about to win? Blank screen after installing nvidia restricted driver they were question banned; it turned out it (in part) it was because of deleted questions.   was deleted by the Community user.  I'm aware it will delete old posts that have a negative score, but for a minute or two, I was really puzzled as to why it was unilaterally deleted without some notation left.  Can we have the Community user leave a notation in a post's history as to why the post was deleted?    Something like the following would suffice:     Post deleted automatically due to having negative votes and no activity for three months How does one add boarding passes to Apple Wallet? Suppose that $(s_n)$ converges to $s$, $(t_n)$ converges to $t$, and $s_n \leq t_n \: \forall \: n$. Prove that $s \leq t$. I'm stuck with the proof of the following:  Suppose that $(s_n)$ converges to $s$, $(t_n)$ converges to $t$, and $s_n \leq t_n \: \forall \: n$. Prove that $s \leq t$.   I've tried starting with $s_n \leq t_n \: \forall : n$ and the definitions of each limit (i.e. $|s_n - s| \leq \epsilon \: \forall \: n &gt; N_1$), but I'm not really getting very far. Any help is appreciated! Listings: text highlighting based on prefix How can I apply different styles to keywords depending on their prefix?  Here is some sample code:  (-2,0,0) (2,1,1) op-registerbox !box1 ;box1 /Blue op-setproperties   I'd like to typeset   words starting with ! and ; in color red, words starting with / in color green, words starting with cp- in bold.   So far, this is what I've got:  \lstdefinelanguage{XX} { basicstyle=\small\sffamily\fontseries{c}, emphstyle=\underbar, keywordsprefix=[2]{/}, alsoletter={/}, keywordstyle=\textbf, keywordstyle=[2]\color{green}, morekeywords={op,registerbox, ...}, morestring=[b][\color{green}]", columns=flexible, escapechar=\%, numbersep=6pt, numberstyle=\scriptsize }   I'm aware that only one keywordsprefix can be defined at the moment: specifying more than one class of prefix (keywordsprefix=[2]{/}) is currently not supported. I'd like to avoid having to list all the words that match my description into morekeywords. Is that possible? How? Pdf bookmark error in beamer Hi. I've compiled a Persian language beamer file by both luapersian and persian babel package using LuaLaTex, and in both I've the same problem in pdf bookmark as shown in the figure (some strange characters are shown instead of correct characters). I need to periodically run a command that ensures that some text files are kept in Linux mode. Unfortunately dos2unix always modifies the file, which would mess file's and folder's timestamps and cause unnecessary writes.   The script I write is in Bash, so  I'd prefer answers based on Bash. Recently, my answers are showing at the bottom of the page, even though I got good scores on those answers.       How do I change this back? HTTP vs HTTPS performance Are there any major differences in performance between http and https?  I seem to recall reading that HTTPS can be a fifth as fast as HTTP.  Is this valid with the current generation webservers/browsers?  If so, are there any whitepapers to support it? Is there a good word for a square-rectangle relationship? Any given square is always a rectangle, but a rectangle isn't necessarily a square, so squares and rectangles have a _ relationship. I've been noticing this sort of thing everywhere ever since I noticed that I didn't know a good word for it. I've been calling it a container relationship because one class of things is contained within a larger class of things. However, a "container" relationship doesn't sound very good and doesn't really convey the meaning on its own. A more elegant word would be helpful.  Edit: A specific definition would be something like: a is always b. b is sometimes a. Does an unplugged hard drive used for data archival deteriorate? If I were to archive data on a hard drive, unplug it, and set it on a (not dusty, temperature-controlled) shelf somewhere, would that drive deteriorate much?  How does the data retention of an unplugged hard drive compare to tapes? Objects disappear when looking through camera