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  • Cannot establish XMPP server-to-server connection to gmail

    - by v_2e
    My jabber-server fails to connect to gmail.com giving the error: outgoing s2s stream myserver.com.ua-bot.talk.google.com closed: undefined-condition (myserver.com.ua is a Google Apps Domain with Talk service enabled.) I am using the Prosody XMPP server. It works just fine with other jabber-servers I tested so far (e.g. jabber.ru). However, when some of my clients tries to add a gmail contact to his contact-list, the subscription request lasts forever, and the Prosody gives the following sequence of messages in its log: Oct 21 22:57:16 s2sout95897f8 info Beginning new connection attempt to gmail.com ([173.194.70.125]:5269) Oct 21 22:57:16 s2sout95897f8 info sent dialback key on outgoing s2s stream Oct 21 22:57:16 s2sout95897f8 info Session closed by remote with error: undefined-condition (myserver.com.ua is a Google Apps Domain with Talk service enabled.) Oct 21 22:57:16 s2sout95897f8 info outgoing s2s stream myserver.com.ua->gmail.com closed: undefined-condition (myserver.com.ua is a Google Apps Domain with Talk service enabled.) Oct 21 22:57:16 s2sout95897f8 info sending error replies for 2 queued stanzas because of failed outgoing connection to gmail.com Here for the domain name of my server I use myserver.com.ua I found a similar problem described in this thread, but there is no detailed description of the solution there. As for the Google services, I did have a google account where I added the domain name under question to the Webmasters tools page. However, I deleted my account long ago, so now it is unclear, how any of the Google services can relate to my domain name. So my question is: What is the real cause of this problem (my jabber-server configuration or imaginary Google account or something else) and how can I make my Prosody server connect to gmail.com jabber service?

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  • Cannot find network path for computer in workgroup of home Windows XP PCs

    - by John Galt
    VMWare Workstation 6.5 is running as an app on a Windows Vista 64bit PC host. Thanks to Workstation we have 2 guest machines running: TerriVM and MattVM (both of these run Windows XP SP2). We are attempting to get virtual networking configured so we can access the files of both of these VM guest systems from other real PCs connected to this home network. We think we are close but we can't quite get it right... Here is what we've done so far: * On VM Workstation, we set "Host Virtual Network Mapping" to use VMnet0 with the setting "Bridge to an automatically chosen adapter". * On each VM guest (i.e. using Windows explorer on XP), we rightmouse on the C disk, click "Sharing" tab, set shareName to "C_Disk" and check both boxes labeled "Share this folder on the network" and "Allow network users to change my files". Symptoms: On "JohnsRealXP" PC, we go to Windows Explorer, My Computer, Map Network Drive, type into Folder textbox: \TerriVM\C_Disk and assign drive letter T. We see all the folders on this shared drive and can open files on them. So that is good. On same "JohnsRealXP" PC, we go to Windows Explorer, My Computer, Map Network Drive, type into Folder textbox: \MattVM\C_Disk and assign drive letter M. We get a message box "_The network path \mattvm\C_Disk could not be found_". Alternatively, we type just \mattvm\ into the Folder box and click "Browse" and get a dialog box where we drill down from "Entire Network" to "Microsoft Windows Network" to "Workgroup" where both TerriVM and MattVM are listed as computers on the network. Clicking the + sign next to MattVM gives an hourglass and never enables the OK button and I have to cancel. In summary, I think we've attempted to share both of these virtual machines using the same techniques and connect to them in similar fashion, but one connects properly and the other machine can be seen but no shared resources on it can be accessed. Can anyone suggest something possibly overlooked or something to try? Thanks so much in advance.

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  • iptables port forward + nginx redirect problem

    - by easthero
    Here is my network browser = proxy(iptables port forward) = nginx server proxy: 192.168.10.204, forward 192.168.10.204:22080 to 192.168.10.10:80 nginx server: 192.168.10.10 nginx version:0.7.65 debian testing in nginx settings, I set: server_name _; server_name_in_redirect off; because my server has no domain now, access 192.168.10.10/index.html or 192.168.10.10/foobar is ok then access 192.168.10.204:22080/index.html is ok but access 192.168.10.204:22080/foobar, nginx 301 redirect to http://192.168.10.204/foobar how to fix? thanks telnet 192.168.10.204 22080 Trying 192.168.10.204... Connected to 192.168.10.204. Escape character is '^]'. GET /index.html HTTP/1.1 Host: 192.168.10.10 HTTP/1.1 200 OK Server: nginx/0.7.65 Date: Fri, 28 May 2010 10:07:29 GMT Content-Type: text/html Content-Length: 12 Last-Modified: Fri, 28 May 2010 07:25:12 GMT Connection: keep-alive Accept-Ranges: bytes hello world telnet 192.168.10.204 22080 Trying 192.168.10.204... Connected to 192.168.10.204. Escape character is '^]'. GET /test2 HTTP/1.1 Host: 192.168.10.10 HTTP/1.1 301 Moved Permanently Server: nginx/0.7.65 Date: Fri, 28 May 2010 10:04:20 GMT Content-Type: text/html Content-Length: 185 Location: http://192.168.10.10/test2/ Connection: keep-alive <html> <head><title>301 Moved Permanently</title></head> <body bgcolor="white"> <center><h1>301 Moved Permanently</h1></center> <hr><center>nginx/0.7.65</center> </body> </html>

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  • Xinerama creates a panning viewport

    - by iblue
    EDIT: I've created a bug report: https://bugs.freedesktop.org/show_bug.cgi?id=48458 My Setup I have 4 monitors, 1920x1080, which are in portrait mode (rotated left). They are connected to two radeon graphic cards. As usual, a picture says more than a thousand words. The problem Everything works fine, when Xinerama is disabled. But when I enable Xinerama, things get weird. When I move the mouse of the screen and return, the screen contents begin to move with the mouse, only on this monitor. It seems like the virtual display size does not match the real screen size, which activates a panning viewport. Any idea how to stop this? The video I created a video to demonstrate the issue: http://www.youtube.com/watch?v=zq_XHji1P24 xorg.conf This is my xorg.conf: Section "ServerLayout" ##################[ Evilness begins here ]############# Option "Xinerama" "on" # <--- Makes it go b0rked! ##################[ End of all evil ]############# Identifier "BOFH Console of Doom" Screen 0 "Screen-0" 0 0 Screen 1 "Screen-1" RightOf "Screen-0" Screen 2 "Screen-2" RightOf "Screen-1" Screen 3 "Screen-3" RightOf "Screen-2" EndSection Section "ServerFlags" Option "RandR" "false" EndSection Section "Module" Load "dbe" Load "dri" Load "extmod" Load "dri2" Load "record" Load "glx" EndSection Section "Monitor" Identifier "Monitor-0" Option "Rotate" "left" EndSection Section "Monitor" Identifier "Monitor-1" Option "Rotate" "left" EndSection Section "Monitor" Identifier "Monitor-2" Option "Rotate" "left" EndSection Section "Monitor" Identifier "Monitor-3" Option "Rotate" "left" EndSection Section "Device" Identifier "Radeon-0-0" Driver "radeon" BusID "PCI:9:0:0" Option "ZaphodHeads" "DVI-0" Screen 0 EndSection Section "Device" Identifier "Radeon-0-1" Driver "radeon" BusID "PCI:9:0:0" Option "ZaphodHeads" "DVI-1" Screen 1 EndSection Section "Device" Identifier "Radeon-1-0" Driver "radeon" BusID "PCI:4:0:0" Option "ZaphodHeads" "DVI-2" Screen 0 EndSection Section "Device" Identifier "Radeon-1-1" Driver "radeon" BusID "PCI:4:0:0" Option "ZaphodHeads" "DVI-3" Screen 1 EndSection Section "Screen" Identifier "Screen-0" Device "Radeon-0-0" Monitor "Monitor-0" DefaultDepth 24 SubSection "Display" Viewport 0 0 Depth 24 EndSubSection EndSection Section "Screen" Identifier "Screen-1" Device "Radeon-0-1" Monitor "Monitor-1" DefaultDepth 24 SubSection "Display" Viewport 0 0 Depth 24 EndSubSection EndSection Section "Screen" Identifier "Screen-2" Device "Radeon-1-0" Monitor "Monitor-2" DefaultDepth 24 SubSection "Display" Viewport 0 0 Depth 24 EndSubSection EndSection Section "Screen" Identifier "Screen-3" Device "Radeon-1-1" Monitor "Monitor-3" DefaultDepth 24 SubSection "Display" Viewport 0 0 Depth 24 EndSubSection EndSection

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  • VMWare converter performance

    - by bellocarico
    Hello, I have a question about my test lab. It's more to understand the concept more than apply this into production: I have an ESXi with few VMs linux/windows configured and I'd like to use VMWare converter to create backups. To speedup the process I decided to create a Windows VM on the same ESXi host where I've installed Windows 7 and VMWare Converter. The Host has a gigabit card but it's currently connected to a 100Mb FD port. Windows 7 sees a 1gb card connected. When I do the backup using VMWare converter I specify the host IP as source and destination, so I thought the copy could be faster then use my laptop across the network. Well, to cut a long sotry short: I get dreadful performance (4Mb/sec). I'm a buit confused on this because despite the fact that the host is running 100Mb communication between VMs and hosts shouldn't (correct me if I'm wrong) have any limitation instead. I did tweak windows 7 to optimise network performane but I got just a little improvement. i still need 4 hours to back up a 50Gb (thin) VM. Additionally I wanted to ask: Would jumbo frame help in this? I know that jumbo frame have to be supported end to end, and the network switch where the host is currently connected doesn't support this, but I was wondering: 1) Does ESXi host support jumbo frames at all? 2) Can I enable it somehow? 3) If I do so, I guess bulk transfert between VMs and host would improve, but would this affect the communication going through the real switch as this doesn't do jumbo? Thanks for reading

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  • How to fake ip at localhost without LoopBack.

    - by sexer
    How can i fake an ip on my own PC? for example if there were an ip address lets say 201.91.81.71, that Host is somewhere outside of my red and is hosting a webserver. How can set a website on my own PC, and when i go to browser and try to explore 201.91.81.71 it actually explore the website at my own PC? pd: I need it with IP addresses not domain names, since I need to implement it on a non-web service. First guess was installing a LoopBack with 201.191.81.71 as ip, but since some times the subnet works and some other it doesn't isn't a stable solution. Second guess was adding a route to route table : route add 201.91.81.71 mask 255.255.255.255 192.168.1.2 192.168.1.2 is the ip address of my NIC. If i could add this route it would work but windows doesn't let me do so. route add 201.91.81.71 mask 255.255.255.255 127.0.0.1 it doesn't let me set as gateway 127.0.0.1 if 201.91.81.71 isn't set in a NIC, so thats why i set sometimes loopback and this route add is auto, but it needs a subnet mask which doesn't match the ip and cannot set 255.255.255.255, im in real throubles here. can i get some help? thx.

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  • Maximum limit of filepointer in php reached and not changeable

    - by mlaug
    I have a server with the current 5.3.x version installed. Since we are running a really simple and small server in php using sockets, that connects to a lot clients using sockets we need to raise the open file limit that has been already done on the server for the user, that runs the server #ulimit -a core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size (blocks, -f) unlimited pending signals (-i) 29879 max locked memory (kbytes, -l) 64 max memory size (kbytes, -m) unlimited open files (-n) 8192 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 real-time priority (-r) 0 stack size (kbytes, -s) 8192 cpu time (seconds, -t) unlimited max user processes (-u) 29879 virtual memory (kbytes, -v) unlimited file locks (-x) unlimited and we compiled php with --enable-fd-setsize=8192 still we are getting [19-Nov-2012 09:24:23 Europe/Berlin] PHP Warning: socket_select(): You MUST recompile PHP with a larger value of FD_SETSIZE. It is set to 1024, but you have descriptors numbered at least as high as 1024. --enable-fd-setsize=2048 is recommended, but you may want to set it to equal the maximum number of open files supported by your system, in order to avoid seeing this error again at a later date. once in a while in our logs. Anyone knows who to configure the unix server and php correctly to have that working? I found a bug, but that is related to 2006 and marked as "not a bug" https://bugs.php.net/bug.php?id=37025&edit=1

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  • How to unblacklist an IP at Google?

    - by DJRayon
    I own a small business with two servers for webhosting. When setting up the primary (CentOS 5.5 + WHM, secondary is WHM DNS Only) server I kinda messed up the firewall, so the hackers could send stuff from my server. My primary IP is x.y.29.218. Anyway - I got blacklisted in several places, but now those blacklistings are gone. For a week or so, but Google still has my IP blacklisted. I handling serious damages because of that. Many clients want to switch from my hosting, etc. I've fixed the hole with CSF firewall SMTP_BLOCK option and enabled also the WHM SMTP TEAK Currently all I see from the Main Email View Mail Statistics (Errors section) in WHM is rows and rows of the following message removed-the-email-address-for-security R=lookuphost T=remote_smtp: SMTP error from remote mail server after end of data: host aspmx.l.google.com [a.b.39.27]: 550-5.7.1 [x.y.29.218 1] Our system has detected an unusual rate of\n550-5.7.1 unsolicited mail originating from your IP address. To protect our\n550-5.7.1 users from spam, mail sent from your IP address has been blocked.\n550-5.7.1 Please visit http://www.google.com/mail/help/bulk_mail.html to review\n550 5.7.1 our Bulk Email Senders Guidelines. h24si3868764fas.171 What are my options? I have one IP free. How can I configure Exim to send mail from that IP? My brain is like constantly blowing up because of this problem. Please someone, who has any knowledge how to deal with the current situation, please give me some kind of help - any help, suggestions, etc. I've tried everything I know, and I still don't know much, because this is the first time (I just started to webhost, etc) I deal with real physical servers not some kind of pre-setup VPS solution. Many - many thanks, whoever has time to offer some help.

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  • Haproxy and CNAME

    - by user123354
    I want to create a simple load balancer for the two servers. The problem is with CNAME records, I think. Let's say I have two the same applications on AppFog.com. app1.aws.af.cm and app2.aws.af.cm Here is my haproxy.cfg file: global maxconn 2000 daemon defaults mode http clitimeout 60000 srvtimeout 30000 contimeout 4000 option httpclose listen http_proxy bind [myip]:80 mode http stats enable stats auth user:passwd stats uri /stats balance source option httpchk option forwardfor server host01 app1.aws.af.cm:80 maxconn 300 check server host02 app2.aws.af.cm:80 maxconn 300 check But this only resolving IP for domain app1.aws.af.cm and app2.aws.af.cm, which obviously doesn't work if I open this IP in web browser. The problem is that AppFog doesn't have public IP for application (same as OpenShift). How to do that Haproxy to perform a proper connection between Load Balancer and this two servers? Example: This is real app - http://freechat.eu01.aws.af.cm Haproxy only resolves IP for this domain which is 46.51.204.8:80 Of course this IP will not show my application, only an error page. Sorry for my poor English.

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  • When did my LaTeX files become TeX files!?

    - by andrz_001
    After transferring all my files onto a new machine, all files that were once LaTeX files (having the texnic center "T" icon) are now TeX files (having the TeX works icon --I don't remember installing that one!). But....the files are associated with the technic center! In other words, the files open with the texnic center, yet the "type of file" is "tex document". I'm using the same miktex distrubution and texnicCenter (both for windows xp) as on the old machine. Again, I don't know how/where I got this texworks on the new machine--assuming it came with windows. A question: Could these tex associations cause me any new surprises, anything unexpected? Like certain packages not working, etc? Because I can't have that!! Should I not fix it if it ain't broken!? For instance, one particular file yesterday would not produce any pdf output after compiling...after trying many things (other files compiled as they should have), I got to thinking to try it without the setspace for doublespacing!! And it worked. I have no idea why. Anyway.... Real question: How to revert to LaTeX file associations?? Rhetorical question: Would this question have better luck in ctan or stackoverflow? I guess I'll find out! Thank you wholeheartedly!

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  • How to add a privilege to an account in Windows?

    - by mark
    Given: A VM running Windows 2008 I am logged on there using my domain account (SHUNRANET\markk) I have added the "Create global objects" privilege to my domain account: The VM is restarted (I know logout/logon is enough, but I had to restart) I logon again using the same domain account. It seems still to have the privilege: I run some process and examine its Security properties using the Process Explorer. The account does not seem to have the privilege: This is not an idle curiousity. I have a real problem, that without this privilege the named pipe WCF binding works neither on Windows 2008 nor on Windows 7! Here is an interesting discussion on this matter - http://social.msdn.microsoft.com/forums/en-US/wcf/thread/b71cfd4d-3e7f-4d76-9561-1e6070414620. Does anyone know how to make this work? Thanks. EDIT BTW, when I run the process elevated, everything is fine and the process explorer does display the privilege as expected: But I do not want to run it elevated. EDIT2 I equally welcome any solution. Be it configuration only or mixed with code. EDIT3 I have posted the same question on MSDN forums and they have redirected me to this page - http://support.microsoft.com/default.aspx?scid=kb;EN-US;132958. I am yet to determine the relevance of it, but it looks promising. Notice also that it is a completely coding solution that they propose, so whoever moved this post to the ServerFault - please reinstate it back in the StackOverflow.

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  • RHEL 5.2 installing on ProLiant BL460c - hangs at 'now booting the kernel'

    - by Dr Rocket Mr Socket
    As the title states, I have a problem. This server and the installation disc are also on the other side of the world to me so... So far, I have tried to start the install with the parameters: linux text noapic noacpi no=apic no=acpi which results in the same hang. I have also disabled a PCI ethernet adapter, I am uneasy about disabling the onboard ethernet adapter I do not know if ILO uses this. Anyone have any advice? Much appreciated. EDIT: full output after trying to begin the installation. boot: linux text Loading initrd.img.................. Loading vmlinuz....... Uncompressing Linux...done. Now booting the kernel stays on this for hours EDIT2: adding the 'mem=40960M' (server has 40 gigs of ram) parameter allows it to proceed but the following output directly after 'Now booting the kernal' Memory: sized by int13 0e801h initrd extends beyond end of memory (0x00ef2090 > 0x00000000) disabling initrd Console: 16 point font, 400 scans Console: colour VGA+ 80x25, 1 virtual console (max 63) pcibios_init : BIOS32 Service Directory Structure at 0x000ffee0 pcibios_init : BIOS32 Service Directory entry at 0xf0000

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  • How to get german QWERTY on Windows?

    - by Arturas M
    Well I'm used to having the world standard keyboard which is qwerty and not qwertz... But on windows I can't find the choice for german input which would be qwerty, not qwertz. In linux there was german input with qwerty so it was fun. I believe it should be on Windows too? Cause i'm sick of this qwertz always having to correct and search for z or y... Yeah, I know, if Germans made a mistake, it wasn't loosing WW2... Edit: Maybe I wasn't clear enough, it's not about changing between different language inputs? It's about having all german keys in german input, just the z and y would be in the correct places like all the worlds keyboards use and like the US keyboard uses... Solution: Well unfortunately by searching everywhere and waiting for answers I couldn't find what I needed, so I came up with this solution - I used The The Microsoft Keyboard Layout Creator And created my own very custom layout by modifying the default german layout and switching places of z and y. In case somebody needs it and doesn't want to go the hard way, I decided to upload them, so here are the links to download and install the keyboard layout: http://www20.zippyshare.com/v/95071447/file.html http://rapidshare.com/files/3822150342/German%20QWERTY%202%20by%20Arturas%20M.zip It will appear as a choice under German input between languages in your language bar. If you just want to use this german layout, just remove all german layouts and install this one. Good luck and have fun using it!

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  • Using gitlab behind Apache proxy all generated urls are wrong

    - by Hippyjim
    I've set up Gitlab on Ubuntu 12.04 using the default package from https://about.gitlab.com/downloads/ {edit to clarify} I've set up Apache to proxy and run the nginx server the package installed on port 8888 (or so I thought). As I had Apache installed already I have to run nginx on localhost:8888. The problem is, all images (such as avatars) are now served from http://localhost:8888, and all the checkout urls Gitlab gives are also localhost - instead of using my domain name. If I change /etc/gitlab/gitlab.rb to use that url, then Gitlab stops working and gives a 503. Any ideas how I can tell Gitlab what URL to present to the world, even though it's really running on localhost? /etc/gitlab/gitlab.rb looks like: # Change the external_url to the address your users will type in their browser external_url 'http://my.local.domain' redis['port'] = 6379 postgresql['port'] = 2345 unicorn['port'] = 3456 and /opt/gitlab/embedded/conf/nginx.conf looks like: server { listen localhost:8888; server_name my.local.domain; [Update] It looks like nginx is still listening on the wrong port if I don't specify localhost:8888 as the external_url. I found this in /var/log/gitlab/nginx/error.log 2014/08/19 14:29:58 [emerg] 2526#0: bind() to 0.0.0.0:80 failed (98: Address already in use) 2014/08/19 14:29:58 [emerg] 2526#0: bind() to 0.0.0.0:80 failed (98: Address already in use) 2014/08/19 14:29:58 [emerg] 2526#0: bind() to 0.0.0.0:80 failed (98: Address already in use) 2014/08/19 14:29:58 [emerg] 2526#0: bind() to 0.0.0.0:80 failed (98: Address already in use) 2014/08/19 14:29:58 [emerg] 2526#0: bind() to 0.0.0.0:80 failed (98: Address already in use) 2014/08/19 14:29:58 [emerg] 2526#0: still could not bind() Apache setup looks like: <VirtualHost *:80> ServerName my.local.domain ServerSignature Off ProxyPreserveHost On AllowEncodedSlashes NoDecode <Location /> ProxyPass http://localhost:8888/ ProxyPassReverse http://127.0.0.1:8888 ProxyPassReverse http://my.local.domain </Location> </VirtualHost> Which seems to proxy everything back ok if Gitlab listens on localhost:8888 - I just need Gitlab to start displaying the right URL, instead of localhost:8888.

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  • How to get nginx to pass HTTP_AUTHORIZATION header to Apache

    - by codeinthehole
    Am using Nginx as a reverse proxy to an Apache server that uses HTTP Auth. For some reason, I can't get the HTTP_AUTHORIZATION header through to Apache, it seems to get filtered out by Nginx. Hence, no requests can authenticate. Note that the Basic auth is dynamic so I don't want to hard-code it in my nginx config. My nginx config is: server { listen 80; server_name example.co.uk ; access_log /var/log/nginx/access.cdk-dev.tangentlabs.co.uk.log; gzip on; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_read_timeout 120; location / { proxy_pass http://localhost:81/; } location ~* \.(jpg|png|gif|jpeg|js|css|mp3|wav|swf|mov|doc|xls|ppt|docx|pptx|xlsx|swf)$ { if (!-f $request_filename) { break; proxy_pass http://localhost:81; } root /var/www/example; } } Anyone know why this is happening? Update - turns out the problem was something I had overlooked in my original question: mod_wsgi. The site in question here is a Django site, and it turns out that Apache does get the auth variables passed through, however mod_wsgi filters them out. The resolution is to use: WSGIPassAuthorization On See http://www.arnebrodowski.de/blog/508-Django,-mod_wsgi-and-HTTP-Authentication.html for more details

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  • LVM and cloning HDs

    - by jcea
    Using Linux, I have several backup levels. One of them is a periodical sector by sector copy (using dd) of my laptop harddisk to an external USB disk. Yes, I have other backups too, like remote rsync. This approach (the disk dd) is OK when cloning a HDD with no LVM volumes, since I can plug the external disk anytime and mount the partitions simply mounting /dev/sdb* instead of /dev/sda*. Trivial and handy. Today I moved ALL my harddisk (including the /boot) to LVM. Everything works fine. I will stress it for a couple of days, and then I will do a sector by sector copy to my external harddisk. Now I have a problem, I guess. If in the future I plug the external USB HDD to recover any file, the OS will detect a duplicate LVM configuration, with the same name and the same UUID. Even doing a vgrename (which LVM would be renamed, the internal HDD or the external HDD?), the cloned UUID will not change. Is there any command to change name and UUID? Ideally I would clone the HDD and then change the LVM group name and its UUID, but I don't know how to do it. Another related issue would be... In the past I have booted my laptop using the external disk, using the BIOS boot menu and changing GRUB entries manually to boot from /dev/sdb instead of /dev/sda. But now my current GRUB configuration boots directly from a LVM logical volume, something like: set root='(LVM-root)' in my grub.cfg. So... What is going to happen with duplicated volumes? Any suggestion? I guess I could repartition my external harddisk and change backup strategy from dd to rsync, but this disk has windows installed too, and I really would like to have a physical "real" copy.

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  • What is the IPv6 equivalent to IPv4 RFC1918 addresses?

    - by Kumba
    Having a hard time wrapping my head around IPv6 here. A lot of the lingo seems targeted at enterprise-level IPv6 deployments, discussing link-local, site-local, global unicast, scopes, etc. Not a lot of solid information on really small networks, like home networks. I want to check my thinking and make sure I am getting the correct translations from IPv4-speak to IPv6-speak. The first question is, what's the equivalent of RFC1918 for IPv6? Initial searches suggested there was no equivalent. Then I stumbled upon Unique Local Addresses (RFC4193), and that states that all ULA's should be assigned the prefix fc00, followed by a 40-bit random number in the routing prefix. This random number is to "prevent collisions when two IPv6 networks are interconnected" -- again, another reference to an enterprise-level function. If I have a small local LAN at home, numbered using 192.168.4.0/24, what's my equivalent in IPv6's ULA scope? Assuming I will never, ever, tie that IPv6 address into the real internet (a router will NAT & firewall it), can I ignore the RFC to an extent and go with fc00::4:0/120? It also seems that any address in fc00::/7 are to be globally routable. Does this mean I'll need extra protections so my router would not automatically start advertising these private IPv6 addresses to the world? Second question, what's this link-local thing? Reading suggests a default-assigned address in the fe80::/10 range that has the last 64bits of the address comprised of the interface's MAC address. Seems to be required, too, but I'm annoyed by the constant discussion of it in relation to enterprise networks. Third question, what is scope id for? Seems to be yet another term tossed around in relation to enterprise networks, especially when interconnecting them, but almost no explanation on the smaller home network level. Can I see a scope ID AND CIDR notation used together? I.e., fc00::4:0/120%6, or are scope IDs only supposed to be applied to a single /128 IPv6 address?

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  • Postfix (delivery temporarily suspended: conversation with mydomain.net [private/lmtp] timed out while receiving the initial server greeting)

    - by Paul
    I'm running Debian 7.1, Postfix version 2.9.6, Dovecot Version 2.1.7 To set it up I followed mostly this (without the spamass-clamav-greylist bit) I have also got setup smart host relaying via gmail postconf -n reveals: alias_database = hash:/etc/aliases alias_maps = hash:/etc/aliases append_dot_mydomain = no biff = no config_directory = /etc/postfix inet_interfaces = all inet_protocols = ipv4 mailbox_size_limit = 0 milter_default_action = accept mydestination = MyDomain, localhost.net, localhost myhostname = MyDomain.net mynetworks = 127.0.0.0/8 myorigin = /etc/mailname readme_directory = no recipient_delimiter = + relay_domains = mysql:/etc/postfix/mysql_relay_domains.cf relayhost = [smtp.gmail.com]:587 smtp_connect_timeout = 120s smtp_sasl_auth_enable = yes smtp_sasl_password_maps = hash:/etc/postfix/relay_passwd smtp_sasl_security_options = noanonymous smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache smtp_use_tls = yes smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU) smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_non_fqdn_hostname, reject_non_fqdn_sender, reject_non_fqdn_recipient, reject_unauth_destination, reject_unauth_pipelining, reject_invalid_hostname smtpd_sasl_auth_enable = yes smtpd_sasl_path = private/auth smtpd_sasl_security_options = noanonymous smtpd_sasl_type = dovecot smtpd_tls_cert_file = /etc/ssl/certs/ssl-cert-snakeoil.pem smtpd_tls_key_file = /etc/ssl/private/ssl-cert-snakeoil.key smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache smtpd_use_tls = yes virtual_alias_maps = mysql:/etc/postfix/mysql_virtual_alias_maps.cf virtual_gid_maps = static:3000 virtual_mailbox_base = /home/vmail virtual_mailbox_domains = mysql:/etc/postfix/mysql_virtual_mailbox_domains.cf virtual_mailbox_maps = mysql:/etc/postfix/mysql_virtual_mailbox_maps.cf virtual_transport = lmtp:unix:private/lmtp virtual_uid_maps = static:3000 I am able to send emails to the outside world but all emails sent to me are getting stuck. mailq is showing numerous lines: A69C2414C4 2621 Fri Dec 27 14:57:03 [email protected] (conversation with MyDomain.net[private/lmtp] timed out while receiving the initial server greeting) [email protected] AB78B414BE 3796 Fri Dec 27 14:56:50 [email protected] (delivery temporarily suspended: conversation with MyDomain.net[private/lmtp] timed out while receiving the initial server greeting) [email protected] /var/log/mail.log is showing: Dec 28 09:50:09 hostname postfix/lmtp[10828]: E947C414CD: to=, relay=localhost[private/lmtp], delay=64012, delays=63712/0.25/300/0, dsn=4.4.2, status=deferred (conversation with localhost[private/lmtp] timed out while receiving the initial server greeting) Any help would be greatly appreciated. Thank you

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  • Fail2Ban adds iptable rules but they are not working?

    - by EApubs
    Fail2Ban just blocked my IP for 3 SSH attempts. It added the iptables rule and I can see it using the "sudo iptables -L -n" command. But I can still access the site and login through SSH! What might be the problem? Is it because im using CloudFlare? I have set Nginx to write the real IPs to the access logs instead of the Cloud Flare IP. Isn't it enough? Chain fail2ban-ssh (1 references) target prot opt source destination DROP all -- 119.235.14.8 0.0.0.0/0 RETURN all -- 0.0.0.0/0 0.0.0.0/0 The input chain : Chain INPUT (policy DROP) target prot opt source destination fail2ban-NoAuthFailures tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:80 fail2ban-nginx-dos tcp -- 0.0.0.0/0 0.0.0.0/0 multiport dports 80,8090 fail2ban-postfix tcp -- 0.0.0.0/0 0.0.0.0/0 multiport dports 25,465 fail2ban-ssh-ddos tcp -- 0.0.0.0/0 0.0.0.0/0 multiport dports 22 fail2ban-ssh tcp -- 0.0.0.0/0 0.0.0.0/0 multiport dports 22 ufw-before-logging-input all -- 0.0.0.0/0 0.0.0.0/0 ufw-before-input all -- 0.0.0.0/0 0.0.0.0/0 ufw-after-input all -- 0.0.0.0/0 0.0.0.0/0 ufw-after-logging-input all -- 0.0.0.0/0 0.0.0.0/0 ufw-reject-input all -- 0.0.0.0/0 0.0.0.0/0 ufw-track-input all -- 0.0.0.0/0 0.0.0.0/0 LOG all -- 0.0.0.0/0 0.0.0.0/0 LOG flags 0 level 4

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  • DNS Round-robin, Load Balancing, Load sharing, and failover in 2012

    - by user1089770
    I have been reading many posts on serverfault as well as on other sites regarding all these. What I understand is, Multiple A records(round-robin dns) can be used for both : Load sharing (round-robin, but NOT load-balancing). Many people say that “Load Balancing” but I think there will be no load-balancing because “Balance” means (literally) “compare two(or more) and adjust” (and that is what Real s/w or h/w Load balancers do) but Browsers never do this, instead they randomly select and IP and connect to it. It doesn't have any knowledge about the current load of that server (probably, the IP it picked had the highest load!). Automatic failover (latest browsers only). Yes, I think DNS can be used as a simple failover system (at least in 2012, I dont know when it actually "came in effect"). please refer to : http://webmasters.stackexchange.com/questions/10927/using-multiple-a-records-for-my-domain-do-web-browsers-ever-try-more-than-one and Browser-based DNS failover using multiple A records and http://www.nber.org/sys-admin/dns-failover.html I would like to make sure my assumptions/findings are right. So let me know please.....

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  • Why is my connection slow?

    - by Jay R.
    I have a Dell Precision T5400 with a Broadcom 1Gb onboard NIC. For some strange reason, when I access machines on our local network, the best I can get is around 125KB/s download speed. My laptop that has a 10/100Mb NIC onboard usually gets around 300KB/s or better from the same network resource. Both machines are plugged into the same 1Gb switch which connects to our local network wall jack at 100Mb half duplex. There is also a printer plugged into the same switch at 100Mb full. The resource I'm using for the test is a 30MB zip file copied from a jetty webserver that is running as part of a cruisecontrol installation. The cruisecontrol installation is running WindowsXP with full real-time antivirus and Altiris patch management and inventory running. That stuff on its own is eating some of the download speed. I've seen the laptop reach into the multiple MB/s download speed before, but the desktop never seems to get past 125KB/s to 130KB/s. In WindowsXP, before I upgraded the driver in the desktop, it was that slow. In Fedora, it is still slow even though it appears to be using the same driver version as the upgraded Windows driver. The upgraded Windows driver is faster, but still not nearly as fast as the laptop. What gives? Any insight to improve the situation would be appreciated. Could it be that the BroadCom board just isn't that good, or the driver in linux is just not as good as the Windows one?

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  • "Safe" personal router use on apartment-wide network

    - by noisetank
    I recently moved into an apartment with internet included in my rent. This was a boon at first, but now I'm feeling limited. To get devices connected (wired or wireless), I have to whitelist the MAC addresses on mycampusnet.com. This is annoying (considering I'm well over the 10 device limit including my roommate's stuff), but what's really driving me mad is that I don't seem to have any semblance of a "local" network. I've relied heavily on static IPs and port forwarding in the past (accessing NAS and remote desktop) and (as far as I can understand), that functionality is nonexistent without my router set up. Also, as my wired and wireless devices don't always seem to make it onto the same subnet, I'm unable to use any of my iDevices with my Apple TV (I can, however, mirror to no less than four strangers' Apple TVs at any moment, which is a whole other level of discomforting). I've talked to the head of the apartment complex and she told me that they personally don't have any issue with my using a router, but the provider (CampusConnect) does not currently allow it. Apparently, enough people have put in complaints/requests about the restriction (the apartments are for graduate students and University staff, many of which need to set up things like VPNs for work reasons) to open up some sort of ticket to get the functionality in place, but all the calls I've made to get status updates have been a waste of time. My question is: If I plugged my router into the apartment network, what would happen? I've been told already that personal routers would "interfere with the wireless" and that they would shut my port down if I used one, but is that a legitimate thing or just something made up that sounds real to keep the average Joe from pushing it further? I'm guessing there's some way of configuring my router to keep it from disrupting the rest of the network, but it's not something they want to tell me for obvious reasons. Am I right? And if so, what are the chances that they'd notice the difference in traffic or whatever and shut off my port?

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  • How Can I Make Apache Stop Serving ALL Unknown File Types (like .php~)?

    - by user223304
    I am coming from IIS and moving to Apache and recently found out that Apache by default serves up files of an unknown file extension as PURE TEXT. This can be an issue if a user uses certain programs that back up .php files as .php~. Then the .php~ file becomes completely readable by simply navigating to it in a browser. To make matters worse these .php~ files are often considered 'hidden' in the linux environment from the user so some may not even know they exist. Bots have been created around this fact that scour the internet looking for popular file name backups and extracting potentially secure info from them. I already know how to stop serving up .php~ files or any specific file extensions. I also know not to use any editors that would save backup files like this. My question is, how can I stop this default Apache behavior of serving up ANY non-MIME file type at all? I just don't like the this behavior and would like to stop it. I don't want it serving up .aspx~, .html~, .bob, .carl, no extension or anything else that is not a real MIME type. I know that I can probably go and use a directive to first Deny access to all file types. Then add the ones I want to serve out one by one. But I'm wondering if there's an easier/quicker way. Thanks for any help.

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  • Looking for comprehensive computer monitoring software

    - by cornjuliox
    Summer in this country is insanely hot. So hot in fact, that I think we just lost a machine due to overheating (last recorded CPU/GPU temp was close to 100 C, now it wont start and lets out a long series of short beeps on power up), but that's not my concern here. Since heat is such a problem for me, I use several different pieces of software to monitor temperatures in my machine. I use MSI Afterburner to monitor GPU temp, control GPU fan speed and for some light overclocking, and then I use Speccy and SpeedFan to monitor the rest of the system, CPU temp and everything. The setup works fine for now, but I want to consolidate all this into one program so I'm not juggling several windows at once. Is there any program out there that will let me monitor the following from a single window: CPU Temp and Fan Speed CPU clock GPU Temp and Fan Speed GPU clock, both core and memory Additionally, mobo temp (Speccy lists both CPU and Motherboard temp, I assume that the latter is referring to North and Southbridge temperatures. I'm also looking for the ability to chart these data points on a graph over time, basically to see just how high the temperatures spike under load and for general analysis. It'd be nice if it could handle overclocking of both CPU and GPU in real time too. Any suggestions? Edit: I forgot to mention that I'm on Windows 7, 64-bit

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  • Cheap desktop computer in 19" rack-mountable form-factor?

    - by Alex Basson
    I'm a high school teacher at a small private school. As of this year, we have SMARTBoards in every classroom (though I've had one in the class I share for two years now). The classrooms themselves don't have computers in them, so we teachers bring our laptops to class and connect them to the boards. This has several disadvantages: This takes a few minutes while we wait for the board to boot up and then orient the board to our individual laptop -- we have to do this every time b/c different teachers have different laptops requiring different orientations. This isn't ideal because when you only have 43 minutes per class period, waiting five minutes just to get started is a real waste. Carrying your laptop to class doesn't sound so bad until you consider that we're also carrying textbooks and piles of student papers, and we're carrying it all through crowded high school hallways. More than one laptop has fallen THUNK to the floor, with dire consequences. We feel we could eliminate the need to use our laptops with the SMARTBoards if we had a dedicated computer in each classroom hooked up to the board at all times. Each board set-up is connected to a podium with a standard 19" rack in it, currently housing a power supply and DVD player. There're plenty of rack spaces available. So I'm thinking: maybe we could get some inexpensive computers in a 19" rack-mountable form factor, install them in the podiums, and connect them to the boards on a permanent basis. Any suggestions?

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