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• Issue with SSH on Ubuntu - Local connection ok, remote connection - Is it me or my ISP?

  - by Benjamin

  I have an issue with a server running Ubuntu 12.04, I am trying to set up a remote connection so I can access the server at my work from out of town. I have installed the SSH server and all that stuff, and I have reassigned the default port from 22 to 3399. A local connection from any OS can connect on the 192.168... address, but in no way can I get a connection on the actual IP address. I believe my configuration is correct, and I will attach it. If I have done something wrong in the config, please tell me and I will make a change to it. I honestly think that the Router that my ISP provided is horrible, and although the port for ssh is forwarded, it might be stopping any traffic coming inbound. Is there anything I can try to verify this? /var/log/auth does not show any error when I connect VIA our static IP. I have included all values not commented out below: (sshd_config) Port 3399 ListenAddress 0.0.0.0 Protocol 2 HostKey /etc/ssh/ssh_host_rsa_key HostKey /etc/ssh/ssh_host_dsa_key HostKey /etc/ssh/ssh_host_ecdsa_key UsePrivilegeSeparation yes KeyRegenerationInterval 3600 ServerKeyBits 768 SyslogFacility AUTH LogLevel INFO LoginGraceTime 120 PermitRootLogin yes StrictModes yes UseDNS no RSAAuthentication yes IgnoreRhosts yes RhostsRSAAuthentication no HostbasedAuthentication no PermitEmptyPasswords no ChallengeResponseAuthentication no PasswordAuthentication yes GSSAPIAuthentication no X11Forwarding yes X11DisplayOffset 10 PrintMotd no PrintLastLog yes TCPKeepAlive yes AcceptEnv LANG LC_* Subsystem sftp /usr/lib/openssh/sftp-server UsePAM yes Am I doing this wrong? port forwarding image

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• Website hosted on my virtualbox web server not displaying images or applying css when viewed through phone

  - by WebweaverD

  I would really appreciate it if someone could help me. Please let me know if you need more info in the comments. My Set Up I have a windows 7 pc. On it I run a virtual box VM with a ubuntu 12 guest os and LAMP setup. I share files between the two machines using samba from linux to windows and using windows file sharing (Workgroup) the other way round. The vm is set up with a bridged network adapter and can happily serve web pages to my host machine. I use DHCP reservations on my home wireless router/modem to reserve an ip for the vm and give it a sitename.dev in my windows host file so I can access it at sitename.dev through the browser. The Problem So far so good but I have a dev project which needs a lot of mobile template development, now obviously I can use a browser plugin to simulate a mobile device but I would like to be able to see the real thing easily on my phone during development. So ideally I would like a similar setup on my iphone to my windows setup Now I'm not great on networking and dont have much experience with web server set up. So when I typed the ip of my virtual box into my iphone i wasnt expecting to see anything. I was pleasantly surprised when my site loaded up. The javascript even seems to be running but the images and css are not happening. My Question 1) What is happening here, is it something to do with the bridged set up on the vm network? 2)How do I make the sites load properly through my phone Notes I've also tried another phone. The same sites viewed on live servers work fine.

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• Windows Server 2003 IPSec Tunnel Connected, But Not Working (Possibly NAT/RRAS Related)

  - by Kevinoid

  Configuration I have setup a "raw" IPSec tunnel between a Windows Server 2003 (SBS) machine and a Netgear FVG318 according to the instructions in Microsoft KB816514. The configuration is as follows (using the same conventions as the article): NetA | SBS2003 | FVG318 | NetB 10.0.0.0/24 | 216.x.x.x | 69.y.y.y | 10.0.254.0/24 Both the Main Mode and Quick Mode Security Associations are successfully completed and appear in the IP Security Monitor. I am also able to ping the SBS2003 server on its private address from any computer on NetB. The Problem Any traffic sent from a computer on NetA to NetB, or from SBS2003 to NetB (excluding ICMP Ping responses), is sent out on the public network interface outside the IPSec tunnel (no encryption or header authentication, as if the tunnel were not there). Pings sent from a computer on NetB to a computer on NetA successfully reach computers on NetA, but the responses are silently discarded by SBS2003 (they do not go out in the clear and do not generate any encrypted traffic). Possible Solutions Incorrect Configuration I could have mistyped something, somewhere, or KB816514 could be incorrect in some way. I have tried very hard to eliminate the first option. Have re-created the configuration several times, tried tweaking and adjusting all the settings I could without success (most prevent the SA from being established). NAT/RRAS I have seen multiple posts elsewhere suggesting that this could be due to interaction between NAT and the IPSec filters. Possibly the NetA private addresses get rewritten to 216.x.x.x before being compared with the Quick Mode IPSec filters and don't get tunneled because of the mismatch. In fact, The Cable Guy article from June 2005 "TCP/IP Packet Processing Paths" suggests that this is the case, (see step 2 and 4 of the Transit Traffic path). If this is the case, is there a way to exclude NetA-NetB traffic from NAT? Any thoughts, ideas, suggestions, and/or comments are appreciated.

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• Server Intermittently Inaccessible Externally (but Accessible Internally Continuously)

  - by nicorellius

  I have a CRM on a server on a network. We have a static IP and another server outward facing. We use port-forwarding to map to the CRM, so that when you go to the IP or the FQDN, you get to the CRM: xxx.xxx.xxx.xxx crm.example.com Internally, we can access the CRM by going to crm or crm.example.com Lately, I've been noticing that accessing the server from outside the network times out or gives 503, bad gateway. During that time, I can also SSH (different port, so this works) into the outward facing computer and access the server just fine. I have a robot monitoring the site and indeed via HTTP monitoring the site is going down periodically. I looked through the Apache server access and error logs and nothing stuck out at me so I'm a bit confused as to what could be going on. I also searched the access logs for 503 and found nothing. When I run tracert from outside the network, it appears the packets basically make it through the wider area servers (Comcast city and county servers) and end up dropping at the CRM server's front step. I'm tempted to replace the server because it is older and underpowered but it would be nice to know what is going on. Any ideas what to do next?

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• Single application through OpenVPN tunnel (Debian Lenny)

  - by user14124

  I'm using Debian Lenny and I want to tunnel rtorrent only through a OpenVPN tunnel. I have a tunnel running, the config file looks like this: client dev tun proto udp remote openvpn.xxx.com 1194 resolv-retry infinite nobind persist-key persist-tun ca /etc/openvpn/xxx/keys/ca.crt cert /etc/openvpn/xxx/keys/client.crt key /etc/openvpn/xxx/keys/client.key tls-auth /etc/openvpn/xxx/keys/tls.key 1 ns-cert-type server comp-lzo verb 3 auth-user-pass script-security 3 reneg-sec 0 My idea is that I could run a sockd proxy internally that redirects traffic to the openvpn tunnel. I could use the *nix "proxifier" application "tsocks" to make it possible for rtorrent to connect through that proxy (as rtorrent doesn't support proxies). I have trouble configuring sockd as my IP inside the VPN changes every time I connect. This is a config file someone said would help: http://ircpimps.org/sockd.conf As my IP changes at each connect I don't know what to put in that config file. I have no control over the host side config file. Any help wanted. Any other method is very welcome.

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• "Server not found" errors all over after Wordpress installation

  - by picardo

  I uploaded my Wordpress blog from my local machine to Slicehost and then pointed the domain name to the IP address. Then I installed the blog as normal. Once I went to wp-login.php to login, though, I started getting "Server not found" errors. That was strange because the server process was still running, and I checked many times. I can't see anything wrong in the error log, or the access log either. This doesn't only affect Wordpress. I can't access phpmyadmin either now, which was mapped to a subdirectory of the same domain address. What is going on? Can anyone help? Edit: the blog is located on a subdomain. It's still accessible from IP address. The virtual host configs are ServerName and ServerAlias, both set to blog.mysite.com. When I changed those and restarted apache, phpmyadmin came back. Edit: also it's not a propagation issue because I installed the blog from the domain name. It's only when I tried to log into the admin section, I started getting these errors.

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• Remotely port forward/launch process or a client-less remote desktop app?

  - by DC177E

  I have an XP box running Logmein at a remote location behind a linksys router, which was running well for a whole of four days, until we had a power failure. Our ISP gave us a new IP, the machine restarted, and logmein did not autorun (or, at least, it did not automatically sign in), and our service (which may or may not be a Minecraft server with non-backed-up save files) also did not run upon startup. Logmein does not register the new IP (it still displays the old one). I have a DDNS updater service, so I do know the new dynamic address. I have tried using the built in XP remote desktop service, but, as with almost all non-cloud-based remote desktop services, it requires a port forward. Thus, I would appreciate it if anyone has any ideas as to: A: Any way of accessing our router remotely to forward the remote desktop port. I've seen the Remote Management option (forwarding the setup page to port 8080), but I do not have it enabled. I've tried UPnP, but again, the setup page for our router is not forwarded. B: Any way of remotely launching a process that does not require port forwarding (or uses ports 255XX, 18XXX, or 9000.), such as a remote console service built into XP. I realize this is a near impossibility. C: A Way to remotely start logmein, and sign in, which is likely a definite impossibility. Sorry if this is too specific for Stackexchange, or if I've put it into the wrong section (is SuperUser the correct place for this?). Ideas would, again be much appreciated, as shot-in-the-dark-like this may be.

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• Why Are SPF Records Failing?

  - by robobobobo

  Ok I've been going through various different sites, resources and topics here trying to figure out what is wrong with my SPF records but no matter what I do they don't seem to pass. Here's what I have "v=spf1 +a +mx +ip4:217.78.0.92 +ip4:217.78.0.95 -all" I've tried multiple different tools to check my spf records, some give me a pass, some don't. But I can't send mail to certain google app accounts, they just bounce back all the time which is very annoying. Anyone got any ideas? I have noticed that the source IP address is not the IPV4 addresses I've defined, but Cpanel wouldn't let me add that address into it.. And here's the result of tests I'm getting back from port25.com. I'm running WHM by the way and have enabled spf and dkim. Summary of Results SPF check: fail DomainKeys check: neutral DKIM check: pass Sender-ID check: fail SpamAssassin check: ham Details: HELO hostname: server1.viralbamboo.com Source IP: 2a01:258:f000:6:216:3eff:fe87:9379 mail-from: ###@viralbamboo.com SPF check details: Result: fail (not permitted) ID(s) verified: smtp.mailfrom=###@viralbamboo.com DNS record(s): viralbamboo.com. SPF (no records) viralbamboo.com. 13180 IN TXT "v=spf1 +a +mx +ip4:217.78.0.92 +ip4:217.78.0.95 -all" viralbamboo.com. AAAA (no records) viralbamboo.com. 13180 IN MX 0 viralbamboo.com. viralbamboo.com. AAAA (no records) DomainKeys check details: Result: neutral (message not signed) ID(s) verified: header.From=###@viralbamboo.com DNS record(s): DKIM check details: Result: pass (matches From: ###@viralbamboo.com). ID(s) verified: header.d=viralbamboo.com Canonicalized Headers: content-type:multipart/alternative;'20'boundary="4783D1BE-5685-41CF-B91B-1F15E91DD1E3"'0D''0A' date:Mon,'20'1'20'Jul'20'2013'20'21:30:47'20'+0000'0D''0A' subject:=?utf-8?Q?test?='0D''0A' to:"[email protected]?="'20''0D''0A' from:=?utf-8?Q?Rob_Boland_-_Viralbamboo?='20'<###@viralbamboo.com'0D''0A' mime-version:1.0'0D''0A' dkim-signature:v=1;'20'a=rsa-sha256;'20'q=dns/txt;'20'c=relaxed/relaxed;'20'd=viralbamboo.com;'20's=default;'20'h=Content-Type:Date:Subject:To:From:MIME-Version;'20'bh=CJMO7HYeyNVGvxttf/JspIMoLUiWNE6nlQUg5WjTGZQ=;'20'b=;

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• securing communication between 2 Linux servers on local network for ports only they need access to

  - by gkdsp

  I have two Linux servers connected to each other via a cross-connect cable, forming a local network. One of the servers presents a DMZ for the other server (e.g. database server) that must be very secure. I'm restricting this question to communication between the two servers for ports that only need to be available to these servers (and no one else). Thus, communication between the two servers can be established by: (1) opening the required port(s) on both servers, and authenticating according to the applications' rules. (2) disabling IP Tables associated with the NIC cards the cross-connect cable is attached to (on both servers). Which method is more secure? In the first case, the needed ports are open to the external world, but protected by user name and password. In the second case, none of the needed ports are open to the outside world, but since the IP Tables are disabled for the NIC cards associated with the cross-connect cables, essentially all of the ports may be considered to be "open" between the two servers (and so if the server creating the DMZ is compromized, the hacker on the DMZ server could view all ports open using the cross-connect cable). Any conventional wisdom how to make the communication secure between two servers for ports only these servers need access to?

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• Hostname vs webpage domain.

  - by Mark

  Hi All, Im just starting to look at deploying a webpage and get into the joy of DNS etc. And im wondering how you set up multiple web-servers all with thier own hostnames/public IP addresses, and yet have them serve up a webpage from one domain. For example, lets say you have a website example.com, and an A record in DNS that points at it's IP address of 1.2.3.4 . You want to have two servers, prod1 and prod2 with some kind of load balancer in front of them for fail over reasons. The way I see it you would want to have the hostnames of these servers as prod1.example.com and prod2.example.com and perhaps loadb.example.com. How would you set up the DNS so this would all work. ie you could ssh to any of the server domains, prod1.example.com, prod2.example.com or loadb.example.com and also just use the www.example.com url to go to the website. And would all these server names be resolvable from the public internet and is that safe? This would be a linux environment, for arguments sake ubuntu, a django framework dynamic website, running in apache 2.2 Cheers Mark

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• Follow through - How to setup equivalent USVIDEO.ORG DNS-Proxy on Linux

  - by DNSDC

  I'm quite keen to setup similar service (but FREE) and seems you know how to do this. "you need to run your own private dns with artificial records for example pandora.com you also need a real dns to fall back on. now that all requests for these sites are going to your US located box you can open up port 80 on squid and listen for the traffic. your cache_peer settings should allow you to map each domain to their real ip. The trafic now flows initially from your US located box to the service but then the server responds it responds directly to the host. no magic here. I won't share the fine details as it probably best serves all to not over exploit this." Did you mean we need to 1. Setup Forward-only DNS on a US-based server/ip? 2. Setup cache_peer and cache_peer_domain in Squid, I got this. 3. Any iptables rule, prerouting, postrouting rules needed to accomplish this? Appreciate your expert advice. Cheers, Don

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• How to connect android client to the localhost of Apache server (php) inside my laptop?

  - by user1796310

  I'm trying to create android apps which able sending data through wifi connection to my laptop Apache Server and MySQL database. I use the samsung galaxy tab 10.1 as my mobile device. and the protocol i used is HttpGet or HttpPost. And i use XAMPP( with Apache& SQL) to do the server and process the php. But, due to android cannot detect adhoc network from laptop, i use Virtual Router ( for window 7) to create virtual access point and make the tablet able connect to my laptop. But the problem is: [1] in my apps (client-android), where the httpget or httppost to which url? localhost in my laptop- 127.0.0.1 or localhost in android 10.0.0.1? or the ip address of the virtual router? [2]so, if i want access from android to the localhost(laptop-Apache) to call the php to run? which port? which ip address /url that i need to put in android apps(httpget)? and do i need to modify anything in httpconfig for XAMPP? thanks alot.

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• sharing a USB printer in SOHO environment [migrated]

  - by Registered User

  Here is a situation I am facing, there is USB printer which works only on a Windows XP machine, there are other devices in LAN it is a Small Office Home Office environment. How can this USB printer attached to Windows XP machine be shared so that other laptops or users in Network who have Windows 7 or Linux on their laptops can use this printer. The printer model number is Canon Laser Shot LBP-1210 http://www.canon-europe.com/For_Home/Product_Finder/Printers/Laser/LaserShot_LBP1210/index.asp a print server is not available to me I need to make it work in this situation only.What can I do? the clients are unable to connect to this.It is not a network or TCP/IP printer If a from Windows 7 machine some one wants to use this printer so that he can take a print he gets an error while adding the printer to his machine which is a Windows 7 machine (where as the printer is USB printer on Windows XP machine) Start--->Devices and Printers---> Add Printer---> Find Printer by name or IP address--->Selected a shared printer by name-->\\PC-Name-printer3 and select browse it gives a message Windows can not find a driver for Canon LASER SHOT LBP-1210 on the network what does this mean do I need to install some kind of software at client machine or on the machine where printer is present?

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• Google MAIL not arriving - relay not allowed

  - by renevdkooi

  I have a server with sendmail, hosting my domain mind-zone.nl, i changed the MX records to point to the server. When I use Hotmail or any other client the email arrives and everything is fine. ONLY mail from GMAIL server is bounced and gmail returns "relay denied". I have set all the virtual server host settings etc, from command line I can send mails as well, hotmail works, etc. Just not gmail. The strange thing is, this is what gmail returns: Look at the lower part: "Received by" it returns some IP address which is not mine and has absolutely nothing with my domain. While when I do a NSLOOKUP and change to google's DNS server it will state that the IP Address for my domain is correctly pointing at my server. Technical details of permanent failure: Google tried to deliver your message, but it was rejected by the recipient domain. We recommend contacting the other email provider for further information about the cause of this error. The error that the other server returned was: 554 554 5.7.1: Relay access denied (state 14). ----- Original message ----- MIME-Version: 1.0 Received: by 10.14.37.138 with SMTP id y10mr3421504eea.43.1297665573901; Sun, 13 Feb 2011 22:39:33 -0800 (PST) Received: by 10.14.29.75 with HTTP; Sun, 13 Feb 2011 22:39:33 -0800 (PST)

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• Bridging networks problems

  - by Eric

  In my setup I have 3 computers and 2 (wireless d-link) routers. Computer1 has ethernet and wireless interfaces ethernet : 192.168.0.x (DHCP) wireless : 192.168.10.254 (static) Computer 2 has ethernet with two ips ethernet1 : 192.168.0.90 (static) ethernet2 : 192.168.10.110 (static) Computer 3 is a particular device with a hardcoded ip that I can't change wireless : 192.168.10.41 (static) Router1 manages internet and DHCP for network 192.168.0.0/24 Router2 is more complicated. I don't use DHCP. I use it to bridge between both networks. Its static ip is 192.168.10.1 Computer1 can ping Computer2. Computer1 can ping Computer3. Computer1 can ping Router1. Computer1 cannot ping Router2. Computer2 cannot ping Computer3. Computer2 can ping Router2. Router1 can ping Router1 Router2 can ping Computer2 Router2 cannot ping Computer1 Router2 cannot ping Computer3 This is very weird. Router2 manages the wireless connection, it should be able to ping its own computers right? My question is obviously : How can I make it so Computer2 can access everything else. This is a traditional case of "it was working before christmas and now it doesn't". The ethernet wiring is as follow : [ Computer1 ]----[ Router1 ]---[ Router2 ]---[ Computer3 ] I am using switch (lan) ports on Router1/2.

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• Local Network - Windows 7 and Vista can't see each other

  - by ca8msm

  I've got a strange issue at home that has been bugging me for weeks, but I really need to get it sorted now so I'll detail as much as I can and hopefully someone can spot what might might be wrong. I have a wireless router connected to the internet and 3 devices connected to it. They are: Name OS Network IPv4 PC1 Windows 7 WORKGROUP 192.168.2.2 LAPTOP1 Vista WORKGROUP 192.168.2.3 PS3 192.168.2.4 and they all get their IP addresses dynamically. Both PC1 and LAPTOP1 can ping PS3 and get a response. PC1 and LAPTOP1 are unable to ping each other by ip address unless I ping by their name (which bizarrely shows that it is pinging via the IPv6 address). Also, to confirm this both PC1 and LAPTOP1 can ping each other via the long IPv6 address that they both have so they can obviously see each other just not via IPv4. I've disabled the firewalls on both machines as well to rule that out. I don't really know what IPv6 is used for and I've tried disabling it on both machines but all that happens then is that neither machine can see each other at all then. Does anyone have any idea of what may be stopping them seeing each other, any ways I can look at fixing this, or any network tools that may help identify where it is failing? Thanks, Mark

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• Using Windows as a gateway to the internet

  - by James Wright

  My customer currently blocks outbound RDP and SSH, which means that none of their employees can get access to external Windows and Linux boxes (at the console level). However, a need has recently arisen to give access to an assortment of RDP and SSH endpoints scattered throughout the internet. The endpoint IP addresses are a moving target, and an access list exists to define what those IP addresses are. So now my customer wants to have a single Windows Server that they control as the sole outbound point for RDP/SSH to the internet. Consider it a jump box to the internet. If one of our admins have an access to this Windows box then they can log on, and from there bounce around to RDP/SSH endpoints on the internet. Is a standard Windows 2008 box going to work as a jump box? For example, I seem to recall that Win2k8 limits the number of users that can log on simultaneously, which means that the jump box may not be accessible if lots of users are on it. Advice as to how to make this work..?

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• Email Proxy Ideas

  - by jtnire

  Hi Everyone, I wish to host some managed email servers for some customers. Each customer will have their own email server which will be an all-in-one virtual machine running postfix, dovecot and some webmail suite. Even though each customer will have their own server, I do not wish to give each email server it's own public facing IP. I wish to avail the use of proxy servers so all customers use the same public IP. As for the "smtp-in" from the public internet, this isn't a problem as I can set up many mx servers (using postfix) which will store-and-forward the mail to the correct server (using transport maps). As for the IMAP access from the customer, I was thinking of using perdition which is an IMAP proxy - I believe that this will suit my needs. I am confused however on what to use for the "smtp-out" proxy. The customers will have to authenticate with their receptive email server, however they will have to go via a proxy of some sort as they won't have direct access to their server instance. It probably can't be a store-and-forward proxy either. Does anyone have any idea on what I could use here? Many Thanks

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• Server on blacklist

  - by Cudos

  I have a Debian Wheezy server with several websites with separate domains. Some of these websites uses Wordpress and in turn uses PHP's mail function to send mail. I installed "sendmail" to be able for the server to send mail from PHP. We use Google Apps for our customers, so no need to setup a regular mail server. Now the server is blacklisted at www.spamhaus.org and get this message: This IP address is HELO'ing as "localhost.localdomain" which violates the relevant standards (specifically: RFC5321). I have tried to follow the instructions on these websites with no luck: http://www.cardiothink.com/downloads/README.spamhaus-and-blocked-email.html http://centosbeginer.wordpress.com/2011/07/12/how-to-remove-ip-in-cbl-spamhaus/ Can you please help me figure out how to configure the server? File: /etc/hosts # nameserver config # IPv4 127.0.0.1 somedomain.dk xxx.xxx.xxx.xxx server.somedomain.dk bigby # # IPv6 ::1 ip6-localhost ip6-loopback xxxx::0 ip6-localnet xxxx::0 ip6-mcastprefix xxxx::1 ip6-allnodes xxxx::2 ip6-allrouters xxxx::3 ip6-allhosts xxxx:xxx:xxx:xxxx::2 Debian-76-wheezy-64-minimal File: /etc/hostname bigby somedomain.dk is a made up domain. In reality another domain name I have on this server along with other domains. bigby is also a made up name. It is also something else in reality.

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• Website always having DNS problems

  - by Root

  I moved my website from shared hosting to VPS. When it was in shared hosting all I did is updated my name servers whereas now I got my own VPS server and I used one of my domain sjdpublishing.com as the primary domain for my VPS. I created nameservers as ns1.sjdpublishing.com and ns2.sjdpublishing.com and then my actual website is creativeproperty.com.au which are pointing to ns1.sjdpublishing.com and ns2.sjdpublishing.com I am having repeated problems with my domain creativeproperty.com.au a few weeks back I had a problem which was resolved by flushing DNS and later I got similar problem which was not resolved by flushing DNS, I posted a question here and someone answered me to go to Network Settings in my MAC OSX and remove the IP as in my MAC terminal nslookup creativeproperty.com.au points to my router IP and I fixed this problem Now many of my clients were complaining that they are having same troubles accessing my website. I don't know whether its to flush DNS or change network settings or other issues. Can anyone please check my domain creativeproperty.com.au and sjdpublishing.com are having correct records or not and also can anyone tell me the best solution for this issue?

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• VPS with multiple domains, can EXIM send mail from a different domain?

  - by Mike L.

  I building a site for a client on a VPS running CentOS 5.5 with cPanel WMH 11.28.60. The original domain is XXXXXinvestmenttrust.com. He has about a dozen domains on this server. The site I am building will have confirmation emails as well as provide users to anonymize their email address (like craigslist) I set up email piping to forward emails, but they are all being trapped in the spam folder. A close look at the headers, the emails appear to be comming from [email protected] rather than the actual domain. The IP has a rating of Neutral on www.senderbase.com. I believe it is the conflicting information in the header (the fields set by me, specify the actual domain where the headers put in place by EXIM specify to name of the server) Somewhere I read about SPF & MX entries can fix this, but I have been unable to figure out how. Also, All of the domains use the same IP, and the other websites do not send emails. So I could possibly make the domain in question, the primary (where all emails are sent from that domain by default) Is that possible?

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• Router as primary DNS server, Server as alternate? (or vice versa)

  - by Jakobud

  We have a very small business network, with a typical cable modem hooked into a DD-WRT router. We also run a basic CentOS server that does a variety of things, including acting as the primary DNS server for the office. The reason we need an internal DNS server is because we do a lot of internal web development and use the DNS server to add/remove various local network URLs for internal website testing (like www.testsite.com.local). It's very important for us to be able to add/remove URL aliases easily to the DNS. The problem with this setup is that if we ever need to restart the CentOS server or take it offline for upgrades or whatever, then internet access for all computers on the network is lost. That's because each computer relies on that DNS server to access the Internet I guess? The router is online all the time and very very rarely has to be restarted. It would be nice if we could setup my router to be the primary DNS server but still be running DNS on my server. So we could still add my local testing website URLs to the DNS server in CentOS, but be able to also take down the CentOS server without loosing Internet access on the network. How would this be setup? Would I simply need to add both router + server IP addresses to each computer's IP settings? Is the router primary DNS and server secondary DNS server? Or vice versa? Or can one of the two serve as a fallback for the other? What (if anything) needs to be configured on both the router and server in order for them to recognize that the other DNS server exists on the network? Does anyone have any newb-friendly resources for setting up something like this?

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• Setting up DNS using BIND

  - by dupdupdup

  i have troubles setting up my db files. Please kindly point me in the right direction! i need to define a nameserver that manage a domain example.org.au then i need it to have two records. one called server which is the ip address of current machine the other called www where www.example.org.au will be pointed to another ip address. i cant seem to get my system to work. This is my db.example.org.au file example.org.au. IN SOA server.example.org.au. ( 1; 3; 1h; 1w; 1h ) ; ; ;Host addresses localhost.example.org.au IN A 127.0.0.1 www.example.org.au. IN A 192.168.1.200 ; another virtual machine server.example.org.au IN A 192.168.1.199 ; current virtual machine If possible Please correct my errors! thanks! Any good guides out there? Thanks in advance ! :)

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• Identifying test machines in analytics logs

  - by RTigger

  We're just beginning to add analytics to our SaaS application, to begin (among other things) billing clients based on usage. The problem we're running into is there's a few circumstances where our support team will simulate a log in into production to try to reproduce reported issues with a client's configuration. When they log in, an entry will be made into our analytics logs that their specific account has logged in, which we use to calculate billing. A few ideas we had to solve this: 1) We log IP addresses as well as machine keys for each PC that logs in - we could filter out known IP addresses and/or machine keys belonging to support. The drawback is we have to maintain a list of keys / addresses manually. 2) If support (or anyone else internal) runs our application in debug mode (as opposed to release), it will not report analytics. This is fine, as long as support / anyone else remembers to switch to debug mode. 3) Include some sort of reg key / similar setting required to be set when configuring a production system in order to send analytics. Again, fine, as long as our infrastructure team remembers to set the reg key or setting. All of these approaches require some sort of human involvement, which we all know can be iffy at best. Has anyone run into a similar situation? Is there an automated approach to this problem? (PS Of course, we shouldn't be testing in production, but there are a few one-off instances with customer set up that we can't reproduce without logging in as them in production. This is the only time we do so, and this is the case I'm talking about in this question.)

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• How to find Stolen MacBook with iCloud

  - by user1518089

  My MacBook Air was stolen about 6 weeks ago. Through iCloud and "Find Phone", I have some pictures and a location down to about 2 blocks. The pictures are from the current user taking photos which automatically appear on my local devices. (Yes they probably saw my pictures until I stopped taking them. Yes, they are stupid.) I was thinking about going there and hanging out until I recognized the current users, but it is in a very bad neighborhood and I would be noticed. The police have not done anything. Yes, the MacBook can be locked or a message sent. I am hoping to get it back. Does anyone have ideas on how to track them down? While Find Phone shows their location, it does not report an ip address. Is there a way to get an ip address? Does Facebook face recognition work on strangers? Come on tech geniuses, help me play detective. It does not have Drop Box installed.

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