Wikipedia:Reference desk/Archives/Computing/2013 October 16

Welcome to the Wikipedia Computing Reference Desk Archives
The page you are currently viewing is an archive page. While you can leave answers for any questions shown below, please ask new questions on one of the current reference desk pages.

October 16

twitter

96.37.197.136 (talk) 09:40, 16 October 2013 (UTC)why does twitter use @ and when do i use it? the same with # hashtag?-

"@" followed by a username is a mention or a reply (other users can see that they have been mentioned or replied to in a tweet). See hashtag for more information on "#". --Canley (talk) 09:51, 16 October 2013 (UTC)

Just a slight extension of that, "@" is "at" as in "at <username>" because you're replying "at" whoever you're talking to. --.Yellow1996.^(ЬMИED¡) 16:14, 16 October 2013 (UTC)

What daaaaa... I was going to ask that question right now! Oooohhh!!! Someone read my mind! Miss Bono ^{[hello, hello!]} 20:25, 16 October 2013 (UTC)

Back button disabled when I sign in (on Firefox)

Referring back to this question, I'm now experiencing the same behavior as when I created a redirect (this was not happening until very recently). When I try to go back to what I was doing before I went to Wikipedia, I am not allowed to and I keep going forward to the article I was looking at when I signed in. I was told by someone who doesn't know how to find it that it is Firefox 24.0.— Vchimpanzee · talk · contributions · 19:02, 16 October 2013 (UTC)

And they did give me a way to get around the problem when I asked the previous question. I was hoping someone could explain why I used to be able to sign in and go back to what I was doing but now I have to cheat.— Vchimpanzee · talk · contributions · 20:20, 16 October 2013 (UTC)

If I understand this correctly, you are at the redirect's target page; then when you press the back button, you want to be back at the redirect page, but you get redirected back to the target page that you were already on? I just tried this in FF24 (though I use IE9 for editing Wikipedia) and I didn't experience this problem. For me, in FF24 the back button loads the page how you saw it when you navigated away from it... it's possible your Firefox re-loading it (like bypassing the cache), which is maybe what is causing it to redirect you to the target page. I just tried it in IE9 and both pressing the back button, refreshing, and bypassing the cache with ctrl+F5 got me to the redirect page. Maybe the problem is just with FF. It is also possible that an addon is conflicting with the update from 23 --> 24, but that's only if you have any addons installed. --.Yellow1996.^(ЬMИED¡) 21:42, 16 October 2013 (UTC)

I added a further response to the archived thread at WP:VPT#Redirect disables back button, continued. --Redrose64 (talk) 21:56, 16 October 2013 (UTC)

Recent calls recycling in Iphone

I have Iphone 4 and i mistakenly deleted Recent calls. Is there any application which creates a recycle bin for these numbers, or at least gives me the option to make them reappear? Thanks. Ben-Natan (talk) 20:10, 16 October 2013 (UTC)

If someone here is going to develop such a thing - he sure found himself a customer.. Ben-Natan (talk) 14:40, 17 October 2013 (UTC)

When iOS deletes something it is gone. SO you better chance is to contact your telco and ask them what you called. Graeme Bartlett (talk) 00:04, 19 October 2013 (UTC)

If you are using iCloud Backup and have a recent backup, you can restore your entire phone (including call logs). But you have to erase and restore your entire phone. You can't selectively restore. For future reference, 3rd party apps, Like eCAmm PhoneView can store a separate archive of your call logs, SMS messages, and voice mails (But of course you have to run the program before deleting things) --209.203.125.162 (talk) 18:44, 21 October 2013 (UTC)

How to address a specific computer on a network (with telnet)

I'm trying to troubleshoot a connectivity issue between my computer and my mum's computer for the purpose of data backup. The CrashPlan website tells me to troubleshoot with telnet. Both computers are behind routers. The routers have IP addresses that are specific to them but obviously the computers are assigned addresses by the router. So how do I address my mum's computer for telnet? Is it something like 'telnet 216.239.51.99:192.168.2.1 4242'? If not, then how?! There are two addresses for goodness sake! --2.97.26.56 (talk) 21:07, 16 October 2013 (UTC)

Your mum's machine is behind a router which does both network address translation and a firewall. So right now it's probably blocking the ports you're trying. You can enable that in your mum's router's firewall setting, by opening the ports you're trying to access. Secondly you need to tell your mom's router which local machine the incoming traffic should go; you do that in its "port forwarding" - you set traffic from those ports to go to your mom's actual machine. For that to be stable, you need to make sure her PC always has the same local IP address, which usually means you have to give it a stable address (rather than have it get its address from DHCP) or you need to configure her router to always give her machine (identified by its MAC address) the same IP address by DHCP. -- Finlay McWalterჷTalk 21:39, 16 October 2013 (UTC)

But a caution - if you can access these ports, so can anyone - and hackers routinely scan for open ports. I don't know anything about Crashplan, but before opening any ports, I'd want to be really sure that the program receiving them was safe and the network protocol it used was secure. From some Google searching, it seems Crashplan can do UPnP NAT traversal - is that what you're trying to verify? -- Finlay McWalterჷTalk 21:42, 16 October 2013 (UTC)

See also port knocking, although that probably will require additional software. --Tardis (talk) 06:04, 18 October 2013 (UTC)