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• What would another Ubuntu user's default font be?

  - by Gonzoza

  If I send an email from, say, Thunderbird, and have "Helvetica/Arial" set as my default outgoing font, then my assumption is that most of the world will read that email in Helvetica (Apple) or Arial (Windows). But what if I send that email to another Ubuntu user who does not have the MS core fonts installed? What will the email's font default to? Would Ubuntu override it with something like sans-serif, perhaps?

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• Should I set NOINDEX header for my JS, CSS and image files?

  - by Yoga

  Are there any harms if my site send NOINDEX headers for all my static assets? For image files, I refer to those valueless, e.g. background images, button images, etc. Update: more background information I have this concern is since recent Google said they also execute JS and they might fetch content via Ajax. So, for example, if I send noindex for my jQuery script, so Google would not be able to use them to load Ajax, I suppose it is not good for my site's SEO, right?

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• Why You Should Use SEO

  Search engine optimization (SEO) is a term for optimizing your website so that search engines will be able to find you faster, and also give you a higher ranking. A higher ranking will mean that they will send you more free traffic. And believe it or not, the traffic which the search engines send you, is by far the best traffic which you could hope for.

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• A follow up to yesterday

  - by GrumpyOldDBA

  As I have been asked,  here to tidy up yesterdays post is the procedure my startup procedure calls along with the logging table deployed in the DBA database. Just to muddy the water further I have routines for remotely calling the DBAMessages table through a remote server to send out email from a central server!! Just to explain that I have been ( previously ) limited to only using one Server to send email alerts for multiple Servers so I attempt to code to deal with all possible circumstances...(read more)

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• POST and PUT requests – is it just the convention?

  - by bckpwrld

  I've read quite a few articles on the difference between POST and PUT and in when the two should be used. But there are still few things confusing me ( hopefully questions will make some sense ): 1) We should use PUT to create resources when we want clients to specify the URI of the newly created resources and we should use POST to create resources when we let service generate the URI of the newly created resources. a) Is it just by convention that POST create request doesn't contain an URI of the newly created resource or POST create request actually can't contain the URI of the newly created resource? b) PUT has idempotent semantics and thus can be safely used for absolute updates ( ie we send entire state of the resource to the server ), but not also for relative updates ( ie we send just changes to the resource state ), since that would violate its semantics. But I assume it's still possible for PUT to send relative updates to the server, it's just that in that case the PUT update won't be idempotent? 2) I've read somewhere that we should "use POST to append a resource to a collection identified by a service-generated URI". a) What exactly does that mean? That if URIs for the resources were generated by a server ( thus the resources were created via POST ), then ALL subsequent resources should also be created via POST? Thus, in such situation no resource should be created via PUT? b) If my assumption under a) is correct, could you elaborate why we shouldn't create some resources via POST and some via PUT ( assuming server already contains a collection of resources created via POST )? REPLY: 1) Please correct me if I'm wrong, but from your post and from the link you've posted, it seems: a) The Request-URI in POST is interpreted by server as the URI of the service. Thus, it could just as easily be interpreted as an URI of a newly created resource, if server code was written to recognize Request-URI as such b) Similarly, PUT is able to send relative updates, it's just that service code is usually written such that it will complain if PUT updates are relative. 2) Usually, create has fallen into the POST camp, because of the idea of "appending to a collection." It's become the way to append a resource to a list of resources. I don't quite understand the reasoning behind the idea of "appending to a collection" and why this idea prefers POST for create. Namely, if we create 10 resources via PUT, then server will contain a collection of 10 resources and if we then create another resource, then server will append this resource to that collection ( which will now contain 11 resources )?! Uh, this is kinda confusing thank you

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• How to check if your email server looks like a spam source

  <b>Zona-M:</b> "When you start doing it though, you soon find out that the hardest, or at least lest documented task, is not how to send email, or how to block spam. It is how to make sure that the email you send is always accepted by other sites, that is how to find out if your email server looks like a spam source."

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• USB hub keep changing ports

  - by Danniel Magno

  I have an external powered USB hub and I'm using gammu to send some SMSs, but every time the daemon connect to one specific modem, it has the port changed. Gammu is able to send just one SMS and after that the port is changed. I've already tried using: /dev/ttyUSB3 /dev/serial/by-path/pci-0000:00:0b.0-usb-0:3.4.3:1.0-port0 There is anything to do which will stop the ports to be changed or use any other fixed port? Thanks.

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• Tech Tip : Sending Email from Command line

  <b>Geek Ride:</b> "Everyone is not as lucky as having a full fletched email client like thunderbird or kmail to send mails. There is one unlucky group known as system administrators who have to send the mails either through the command line or a script running on the remote server."

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• How do I create a background image on web page?

  - by kasha

  I am a new designer so hopefully this question isn't too basic! How do I create a background image on a webpage for a programmer? I designed the page in photoshop and I would like to know how to send the background image (the 25% opacity buildings overlay). I would be happy to send the main image (but it is too large and I imagine would slow the site and loading time drastically). here is the link to the design... http://problemio.com/home_page_1_1.pdf

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• How odd this function is? It works in a test project, however, it goes wrong in my project?(Windows Socket) [closed]

  - by user67449

  int SockSend(DataPack &dataPack, SOCKET &sock, char *sockBuf){ int bytesLeft=0, bytesSend=0; int idx=0; bytesLeft=sizeof(dataPack); // ?DataPack?????sockBuf??? memcpy(sockBuf, &dataPack, sizeof(dataPack)); while(bytesLeft>0){ memset(sockBuf, 0, sizeof(sockBuf)); bytesSend=send(sock, &sockBuf[idx], bytesLeft, 0); cout<<"??send()??, bytesSend: "<<bytesSend<<endl; if(bytesSend==SOCKET_ERROR){ cout<<"Error at send()."<<endl; cout<<"Error # "<<WSAGetLastError()<<" happened."<<endl; return 1; } bytesLeft-=bytesSend; idx+=bytesSend; } cout<<"DataPack ???????"<<endl; return 0; } This is the function I defined, which is used to send a user_defined structure DataPack. My code in test project is as follows: char sendBuf[100000]; int res=SockSend(dataPack, sockConn, sendBuf); if(res==1){ cout<<"SockSend()???"<<endl; }else{ cout<<"SockSend()???"<<endl; } My code in my current project is: err=SockSend(dataPackSend, sockConn, sockBuf); if(err==1){ cout<<"SockSend()??"<<endl; exit(0); }else{ cout<<"??? "<<dataPackSend.packNum<<" ?DataPack(??)"<<endl; } Can you tell me where does this function go wrong? I will be appreciated for you answer.

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• What to do with twitter oauth token once retreived?

  - by mcintyre321

  I'm writing a web app that will use twitter as its primary log on method. I've written code which gets the oauth token back from Twitter. My plan is now to Find the entry in my Users table for the twitter username retreived using the token, or create the entry if necessary Update the Users.TwitterOAuthToken column with the new OAuth token Create a permanent cookie with a random guid on the site and insert a record into my UserCookies table matching Cookie to User when a request comes in I will look for the browser cookie id in the UserCookies table, then use that to figure out the user, and make twitter requests on their behalf Write the oauth token into some pages as a js variable so that javascript can make requests on behalf of the user If the user clears his/her cookies the user will have to log in again to twitter Is this the correct process? Have I created any massive security holes? thanks!

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• Is there any way to post Facebook status using ContactsContent Provider?

  - by Subba

  I am using QuickContactBadge widget in my application.I want to post status message to facebook on behalf of user.

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• lighttpd: Backend is overloaded + fcgi-server re-enabled + all handlers are down

  - by AbuZubair

  We have a standard lighttpd deployment with PHP-CGI and our error logs are flooding with the following. This is causing a huge problem because we keep returning 500's to our clients: 2012-10-14 14:28:38: (mod_fastcgi.c.3001) backend is overloaded; we'll disable it for 1 seconds and send the request to another backend instead: reconnects: 0 load: 36 2012-10-14 14:28:38: (mod_fastcgi.c.2764) fcgi-server re-enabled: 0 /tmp/php-7735.socket 2012-10-14 14:28:39: (mod_fastcgi.c.2764) fcgi-server re-enabled: 0 /tmp/php-7735.socket 2012-10-14 14:28:40: (mod_fastcgi.c.3001) backend is overloaded; we'll disable it for 1 seconds and send the request to another backend instead: reconnects: 0 load: 37 2012-10-14 14:28:40: (mod_fastcgi.c.2764) fcgi-server re-enabled: 0 /tmp/php-7735.socket 2012-10-14 14:28:41: (mod_fastcgi.c.3001) backend is overloaded; we'll disable it for 1 seconds and send the request to another backend instead: reconnects: 0 load: 57 2012-10-14 14:28:41: (mod_fastcgi.c.3001) backend is overloaded; we'll disable it for 1 seconds and send the request to another backend instead: reconnects: 0 load: 57 2012-10-14 14:28:42: (mod_fastcgi.c.3597) all handlers for /index.php? on .php are down. Does anyone have any clue as to what is going on? We restarted all php and lighttpd related processes and that didn't fix the problem. We ended up rebooting the whole box and now its gone away, although we fear it may come back later.... In general our deployment has been doing fine for a long time and this is the first time this has happened.

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• Is there a setting in Exchange Server 2007 that we can set to make these headers propogate and be received by a POP/IMAP client?

  - by Ruruboy

  When using EWS Managed API to send Email via Exchange Server 2007. I noticed that MAPI clients like MS Outlook display all custom headers. But when I use POP3/IMAP clients like MS Outlook Express. I have noticed that these custom headers do not display in the message opened from MS Outlook Express. Is there a setting in Exchange Server 2007 that we can set to make these custom headers propagate and be received by a POP/IMAP client? Also why do custom headers in example below display up in lower case in MAPI clients like MS Outlook? But surprisingly if we use SMTPClient class to send email then these headers display as sent with Case Sensitive letters. eg. Header. Example of Headers received by a MAPI client like MS Outlook via Exchange Server 2007 Received: from EXMAILVS1.blabla.com ([192.168.191.136]) by cashtp02.blabla.com ([XXX.XXX.XX.XXX]) with mapi; Mon, 20 Dec 2010 12:17:05 -0800 Content-Type: application/ms-tnef; name="winmail.dat" Content-Transfer-Encoding: binary From: asfsdf <[email protected]> To: asdsdf <[email protected]> Date: Mon, 20 Dec 2010 12:17:04 -0800 Subject: Please send me this header Thread-Topic: Please send me this header Thread-Index: AQHLoILek7g5cFgHQU6lHHfiKkdUMg== Message-ID: <[email protected]> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-Exchange-Organization-SCL: -1 X-MS-TNEF-Correlator: <[email protected]> customheader1: hello ali customheader2: hello Jace MIME-Version: 1.0

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• How to disable all bounce back email in exim 4.69

  - by liame

  I have set up an email server to send out solicited newsletters. There should be no "regular" users of this server, so it is not desirable to send bounce notifications back to the recipient. Especially so since I am tracking bounces myself by parsing the log files periodically. What I want is to unconditionally prevent exim from ever sending a bounce notification email back to a sender. How can I do this? Thank you! (I accidentally posted this to superuser before posting it here, disregard that if you come across) What I want is an email server that will accept all incoming emails, deliver it accordingly (that is remotely or locally) and not send a bounce notification the sender upon bounce. I log bounces myself, in a database. The only function bounce messages have in my setting is to waste resources and bandwidth. I need to send emails fast, using exiwhat during a run, I see a significant number of deliveries to [email protected]. I could potentially increase my email productivity by 10~20% if all bounce emails are eliminated.

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• SMTP Unreachable from Specific Networks

  - by Jason George

  I host my business site through a VPS account. The instance runs Ubuntu and I'm using POSTFIX+Dovecot as my mail server. For the most part, the mail server works fine. I have noticed, however, that I can not send mail from specific local networks. I noticed this at a client's office serval months ago. I can receive email, but any time I tried to send mail when connected to their network the connection would time out. Since I could send my mail after leaving, I chalked it up to improper network configuration and didn't worry about it. Unfortunately I've recently moved, switched service providers, and am forced to use the service providers router due to the special set-up they put in place to give me DSL in the sticks--well beyond the typical range for a DSL run. Now I'm unable to send email from home, which is a problem. I have tried sending email through my phone (using cellular service rather than my DSL) just to confirm the server is currently working. I'm not even sure where start debugging. Any ideas on how I might track down the issue would be greatly appreciated.

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• Communicating via Command Mode with IBM HS22 IMM via AMM

  - by MikeyB

  On previous model blades that contained a BMC, I was able to communicate from our external management station via pass-through commands to the BMC to do things such as power blades on/off, set VPD parameters, reboot the BMC, etc. Now on the HS22, a bunch of things happen differently. For example, we can no longer use the same pass-through commands to write VPD information pages and have them persist across reboots of the IMM - it looks as though those VPD pages are populated from information contained in the IMM. How do we use the Advanced Settings Utility from an external host to communicate with HS22 IMMs? Alternatively, what TCP Command Mode commands do we need to send to the AMM to communicate with the IMM? For our purposes, we specifically cannot communicate with the IMM from the blade itself. Specific example: When I send a pass-thru IPMI command via the AMM to the blade BMC to write information (such as MTM, Serial) into VPD page 0x10, it persists on blades with a BMC (HS21 for example). I can send the same IPMI command to write data to the VPD page on the HS22, however it does not persist across reboots of the IMM. What IPMI commands do I need to send to the IMM? What IPMI commands are asu sending when it sets the MTM & Serial?

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• exim4 to relay emails

  - by Matthieu

  I have exim4 installed on a Linux box. The basics work fine and I can send email from that machine without any problem to whatever email address. I also have a printer/scanner which is capable to send scans as emails. It needs an SMTP gateway to be able to do that. So I give the IP address of that Linux box, changed the configuration a little bit but still cannot get it to work. After I run dpkg-reconfigure exim4-config, here is what I get in /etc/exim4/update-exim4.conf.conf : dc_eximconfig_configtype='internet' dc_other_hostnames='' dc_local_interfaces='127.0.0.1;192.168.2.2' dc_readhost='' dc_relay_domains='mycompanyemail.com' dc_minimaldns='false' dc_relay_nets='192.168.2.0/24' dc_smarthost='' CFILEMODE='644' dc_use_split_config='false' dc_hide_mailname='' dc_mailname_in_oh='true' dc_localdelivery='mail_spool' My problem is that with this configuration, I can only send to emails @mycompanyemail.com... It says I can use wildcard, but when I do that, the '*' is replaced by whatever filename is in the directory where I run all that. How can I configure it to be able to send emails with any domain ? Or am I doing it wrong ? EDIT : here is the part of the log that's causing trouble : 2011-08-03 16:28:18 H=(NPI2D389C) [192.168.2.20] F=<[email protected]> rejected RCPT <[email protected]>: relay not permitted The first part ([email protected]) does not matter. I changed the email address. The point is that if this email is @mycompanyemail.com then everything works fine. Anything else does not work. I could add gmail.com, but I am looking to have any domain working...

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• Exchange Online SMTP Not Working With Any Email Client

  - by emre nevayeshirazi

  I am trying to switch our company mail server to exchange online. I have successfully added my domain and users and can send and receive mails through Outlook Web App. I can also send and receive if I configure my Outlook 2013 client using Exchange protocol. However, some folks in company are using Thunderbird and some old Outlook Clients. For those, I tried to connect to Exchange via IMAP/SMTP. This is what I use, For incoming, IMAP / Port : 993 with SSL / Host : outlook.office365.com For outgoing, SMTP / Port : 589 with TSL / Host : smtp.office365.com I can receive emails, however I could not be able to send emails. I keep getting An error occurred while sending mail. The mail server responded: 4.3.2 Service not active. Please verify that your email address is correct in your Mail preferences and try again. My username and password are correct, I am using my mail address as my username to mailbox. I also tried sending mail via C# application which was working for outlook.com and gmail.com SMTP settings. It also fails to send emails and returns the same error code. I thought TB and other old clients such as Office 2003 might not support Exc. Online so I tried same settings in Office 2013. It successfully connected my mailbox when checking for configuration but failed in sending test message and returned the same error code. Configuration for incoming and outgoing mailbox are taken from here. They are also available on Office 365 user page and they are same. What could be the reason for error ?

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• Postfix / Dovecot email setup not storing email

  - by Nick Duffell

  I'm trying to setup postfix / dovecot on my debian server to use it for a mail server. I set everything up according to a tutorial on the net, and it all seemed OK. I can send emails from it, so SMTP is not a problem, however I cannot receive emails. Looking into the files in /home/nick/mail/ I can see that if I send an email to myself (from the server, to itself) the emails are there, but are put straight into the Deleted Messages folder. I don't know why this is. When I send an email from another mail account (not on this server), the emails are nowhere to be found. Also, looking at the log file /var/log/mail.log all seems to be OK, I get the following when I receive an email, which looks OK to me: Nov 7 22:47:22 nickduffell postfix/local[17825]: 05B1173581A6: to=, relay=local, delay=0.37, delays=0.31/0.02/0/0.03, dsn=2.0.0, status=sent (delivered to mailbox) Any ideas? Thanks EDIT: I should also add that although the emails I send myself are in the Deleted Messages folder, and in my mail client I can see that "Trash" has 3 items, I cannot download them in my mail client...

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• Synchronizing files between Linux servers, through FTP

  - by Daniel Magliola

  I have the following configuration of servers: 1 central linux server, a VPS 8 satellite linux servers, "crappy shared hostings" I have a bunch of files that I need to have in all servers. Right now i'm copying them everywhere manually, but I want to be able to copy them to the central server, and then have a scheduled process that runs every now and then and synchronizes them (only outwardly, no need to try to find "new" files in the satellite servers). There are a couple of catches though: I can't have any custom software in the satellite servers, or do strange command line things that'll auto connect to them and send the files directly. I know this is the way these kinds of things are normally done, but the satellite servers are crappy shared hosting ones where I have absolutely no control over anything. I need to send the files over FTP I also need to have, in my central server, a list of the files that are available in each of the satellite servers, to make sure they are ready before I send traffic to them. If I were to do this manually, the steps would be: get the list of files in a satellite server compare to my own, and send the files that are missing get the list of files again, and store it in my central database. I'd like to know what tools are out there that can alleviate as much of this as possible, first the syncing, and then the "getting the list of files available in the other server". I'm going to be doing everything from PHP, not sure if there are good tools to "use FTP from PHP", which i'm pretty sure i'll have to do for step 3 at least. Thanks in advance for any ideas! Daniel

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• How to install smtp/email server to work with php script?

  - by jiexi

  I have this code $mail->IsSMTP(); $mail->SMTPAuth = true; $mail->SMTPSecure = "ssl"; $mail->Host = "mail.craze.cc"; $mail->Port = 465; $mail->Username = "username"; $mail->Password = "pass"; $mail->SetFrom("[email protected]", "craze.cc"); $mail->AddReplyTo("[email protected]", "craze.cc"); $mail->AddAddress($this->email, $this->username); $mail->IsHTML(false); $mail->Subject = "Activate Your Craze.cc Account"; $mail->Body = $message;`enter code here` How i configure my postfix/sendmail or whatever server to actually work and send the mail? This has been driving me insane! I've tried numerous times to configure these servers. I just want to be able to send emails via my php script... Can someone please link me to a guide to get this all going? or just provide help themselves? Maybe there is an alternative way i can use to send my email in the php script? Basically, i need help just getting the emails to send...

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• Exchange 2013 attachments too big?

  - by KPS

  I am having the toughest time sending large attachments, everywhere I have checked my file size limit for send/receive is 100mb but yet users are unable to receive files even at the size of 14mb. I'm using a spam filter (Appriver) and have worked with there support for a very long time, we see the following errors in logs 13:32:40.260 4 SMTP-000036([myserverIP]) rsp: 354 Start mail input; end with <CRLF>.<CRLF> 13:33:41.038 3 SMTP-000033([myserverIP]) write failed. Error Code=connection reset by peer 13:33:41.038 3 SMTP-000033([myserverIP]) [659500] failed to send. Error Code=connection reset by peer 13:33:41.038 4 SMTP([myserverIP]) [659500] batch reenqueued into tail Windows firewall is disabled on the exchange server, all other emails that are of smaller value come through just fine. Here is a print out of size limits: ConnectorType ConnectorName MaxReceiveMessageSize MaxSendMessageSize ------------- ------------- --------------------- ------------------ Send InternetSendConnector - 35 MB (36,700,160 bytes) Send Appriver-Smarthost - 35 MB (36,700,160 bytes) Receive Default EXCHSRVR 100 MB (104,857,600 bytes) - Receive Client Proxy EXCHSRVR 100 MB (104,857,600 bytes) - Receive Default Frontend EXCHSRVR 100 MB (104,857,600 bytes) - Receive Outbound Proxy Frontend EXCHSRVR 100 MB (104,857,600 bytes) - Receive Client Frontend EXCHSRVR 100 MB (104,857,600 bytes) - Receive ExchangeRelay 100 MB (104,857,600 bytes) - TransportConfig - 100 MB (104,857,600 bytes) 10 MB (10,485,760 bytes) ADSiteLink DEFAULTIPSITELINK Unlimited Unlimited There is a no anti-virus on the server either that could be interfering, I am out of ideas at this point :( EDIT 1 After running BPA, it gives and error: Exchange Organization: Check whether the incoming message(CN=MyDomain,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=WG,DC=local) size isn't set The maximum incoming message size isn't set in organization 'CN=MyDomain,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=WG,DC=local'. This can cause reliability problems. Here are the sizes as of now: [PS] C:\Temp>Get-TransportConfig | ft MaxSendSize, MaxReceiveSize MaxSendSize MaxReceiveSize ----------- -------------- Unlimited Unlimited [PS] C:\Temp>Get-ReceiveConnector | ft name, MaxMessageSize Name MaxMessageSize ---- -------------- Default EXCHSRVR 100 MB (104,857,600 bytes) Client Proxy EXCHSRVR 100 MB (104,857,600 bytes) Default Frontend EXCHSRVR 100 MB (104,857,600 bytes) Outbound Proxy Frontend EXCHSRVR 100 MB (104,857,600 bytes) Client Frontend EXCHSRVR 100 MB (104,857,600 bytes) ExchangeRelay 100 MB (104,857,600 bytes) Again, smaller emails come through just fine. Seems like there is a 10mb receive limit somewhere that I cannot find.

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• Android openvpn + zeroconf browser sending mdns query packets over eth0 instead of tap0 interface on wifi

  - by Mrunal

  On an android device, I am connecting to a remote network using openvpn for performing service discovery. WORKING CASE: After the device is camped on 3g/4g and after connecting to remote network by openvpn, when the zeroconf browser is launched, I can see the mdns query packets being send through the tap0 interface resulting into rendering of services on the browser. From the tcpdump captured on the device, I can see that the mdns query packets are send to tap0 interface. tap0 ip: 192.168.11.200 Route table information: Destination Gateway Genmask Flags Metric Ref Use Iface 76.26.112.234 10.179.240.1 255.255.255.255 UGH 0 0 0 pdpbr1 10.179.240.1 * 255.255.255.255 UH 0 0 0 pdpbr1 32.1.72.136 * 255.255.255.255 UH 0 0 0 pdpbr0 10.179.240.0 * 255.255.255.0 U 0 0 0 pdpbr1 192.168.11.0 * 255.255.255.0 U 0 0 0 tap0 default 192.168.11.1 0.0.0.0 UG 0 0 0 tap0 NOT WORKING CASE: However, after switching on the wifi and connecting it to remote network, when the zeroconf browser is launched, instead of sending the mdns query packets to tap0 interface; these packets are being send to eth0 interface due to which we cannot see the services. From the tcpdump captured on the device, I can see that mdns query packets are send to eth0 interface. tap0 ip: 192.168.11.200 eth0 ip: 192.168.43.230 route table information: Destination Gateway Genmask Flags Metric Ref Use Iface 76.26.112.234 192.168.43.1 255.255.255.255 UGH 0 0 0 eth0 32.1.72.136 * 255.255.255.255 UH 0 0 0 pdpbr0 192.168.11.0 * 255.255.255.0 U 0 0 0 tap0 192.168.43.0 * 255.255.255.0 U 0 0 0 eth0 default 192.168.11.1 0.0.0.0 UG 0 0 0 tap0 In the above case, even though there is a default route for tap0, all the multicast packets are being routed through eth0. How is this possible? Has anyone observed a similar problem and it would be really helpful if you can help us to discover services through zeroconf browser after the device is connected to remote network via openvpn through wifi. Thank You Very much, Mrunal

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• Sending mail through local MTA while domain MX records point to Google Apps

  - by Assaf

  My domain's email is managed by Google Apps, so that domain users get Gmail and Calendar, etc. But I also want to be able to send applicative notifications to users outside the domain via email (e.g. "some commented on your post", and so on). However, if I try to send email through code I get blocked by Gmail after a few emails. I send marketing email through MailChimp, to minimize the risk of appearing as spam to my users (one-click unsubscribe, etc.). But I can't send applicative message in this way. I want to install a local MTA (my server runs Ubuntu), but I'm not sure what anti-spam measures I need to implement so that receiving MTAs don't think it's a spam server. What's stopping anyone from setting up a mail server and sending emails using my domain name? AFAIK it's the DNS records that show the MTA's address actually belongs to the domain. But my understanding of this is rather superficial, so someone please correct me if I'm wrong. But what sort of DNS configuration do I need to put in place so that I don't get blacklisted (assuming I don't actually spam anyone)? The MX records already point to Google, and I'd like to keep it this way. So do I just need to define an A record for my internal mail server? Should it show email as coming from a sub-domain, so as not to conflict with the bare domain being managed by google? Edit: Does the following SPF record make sense if I want email from my domain name to be sent by either google's servers or any server with a dns name ending with mydomain.com? "v=spf1 ptr mx:google.com mx:googlemail.com ~all" How should I set up reverse DNS for my server? If I have an A record that points mailsender.mydomain.com to my MTA's ip address, does it mean that reverse lookup will only allow emails sent from [email protected]?

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