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• Is it secure to store the cert/key on a private AMI?

  - by Phillip Oldham

  Are there any major security implications to bundling a private AMI which contains the private key/certificate & environment variables? For resiliency I'm creating an EC2 image which should be able to boot and configure itself without any intervention. After boot it will attempt to: Attach & mount specific EBS volume(s) Associate a specific Elastic IP Start issuing backups of the EBS volume(s) to S3 However, to do this it will need the private key/pem files and will need certain environment variables to be available on start-up. Since this is a private AMI I'm wondering if it will be "safe" to store these variables/files directly in the image so that I don't need to specify any user-data information and can therefore start a new instance remotely (from my iPhone, if needed) should the instance be terminated for any reason.

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• Setting up a externally facing server on Windows. How do i setup DNS/Nameservers?

  - by Jason Miesionczek

  So i have a domain name that i would like to host from my static ip internet connection. I have windows server 2008 r2 installed, and dns setup. The dns server is currently behind a firewall, and i have the appropriate rules to allow traffic to reach it. My question is, what entries do i need to create in the DNS so that i can have some nameservers to use at my domain registrar, so that the domain correctly points to the server? I know that most domains have nameservers like ns1.domain.com, ns2.domain.com, etc. What would i point those to in my DNS?

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• LAN connection suddenly domain_not_set.invalid

  - by Liam Coates

  I went to work today - internet fine as always. Came back, dreaded yellow triangle. I can connect wirelessly like i am now on my tablet. Thats completely fine. But through LAN I get the domain_not_set.Invalid message if I renew my IP for example. It seems I just don't have a DNS. But I have literally not touched anything no ones even been in the house. Hows that happen? Any help on why only wireless works would be great, I am gonna buy a wireless adapter tomorrow for the interim but I would like to know why. Thanks.

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• Tunneling HTTPS traffic via a PUTTY/SSL tunnel with SOCKS

  - by ripper234

  I have configured a SOCKS ssh tunnel to a remote proxy, and set my Firefox to use localhost:<port> as a SOCKS proxy. My intention is to tunnel outgoing HTTP/S connections from my machine via a specific 3rd party server I own (on AWS). In my testing, HTTP UTLs are forwarded properly (e.g. when I access http://jsonip.com/ from my computer I do get the server's IP) However, whenever I try to reach an HTTPS address, I get this error: The proxy server is refusing connections How do I debug/fix it? My PUTTY tunnel config is simply (some random source port number + dynamic checked): P.S. I'm aware I might need to manually accept SSL certificates. The reason I'm doing this is to resolve problems using gmail as an outbound SMTP service.

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• DNS Spoofing and Xampp as a proxy, how to configure it?

  - by Angelo

  I have a server running Apache with mod_proxy, a module to use my localhost as a proxy server. When somebody on the same LAN visits my server (my localhost through my lan ip), he/she can see only the .html page loaded into my server. Due to DNS Spoofing restrictions on the client, if he/she clicks on a link that refers to something not on my server, Apache says correctly "Object not found", because the client cannot request the page from the Internet (remember, the DNS is spoofed to my localhost). The question is: how to configure Apache to grab the page in place of the client?

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• Bluetooth Headset drivers on Windows 7

  - by Tom Ribbens

  I have a Dell Precision with integrated bluetooth from work. I wanted to connect either one of my two bluetooth headsets (Plantronics UC Voyager Pro v2 and Sennheiser MM450X) in order to make calls with it using our Cisco IP Communicator. In both cases, the bluetooth pairs ok. Then Windows tries to install drivers, and fails, leaving the device useless. The devices work perfectly with my phone and tablet (both android). What can I do to get it to work? I can't seem to find drivers on either the Plantronics or the Sennheiser site. I am using the Plantronics without the USB dongle they provide, because that is temporarily misplaced :).

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• Using AWS SES with Sendmail

  - by Abs

  I am trying to send mail via AWS SES uisng Sendmail. I have Sendmail version 8.14.4 installed and I followed the first section of this useful tutorial by Amazon. However, I get this: root@:/etc/mail# echo "Subject: test" | sendmail -v [email protected] [email protected]... Connecting to [127.0.0.1] via relay... [email protected]... Deferred: Connection timed out with [127.0.0.1] Can anyone help me get this working? The logs have the following: Dec 14 10:35:21 ip-10-xx-xx-181 sm-msp-queue[17910]: qBE8K1Lu016411: to=root, delay=00:21:24, xdelay=00:06:19, mailer=relay, pri=121806, relay=[127.0.0.1] [127.0.0.1], dsn=4.0.0, stat=Deferred: Connection timed out with [127.0.0.1]

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• Windows Server 2003: Remapping external domain

  - by Chuck Harmston

  We're playing a going-away prank on a coworker, and would like to use a rule in our internal DNS server to redirect techcrunch.com to point at one of our internal development servers. Basically, I'd like to accomplish the same thing as adding a line to a Linux /etc/hosts file, only for the entire network. I have access to our DNS server. How would you go about doing this? I created an entry in the reverse lookup subnet with the 'Host Name' of techcrunch.com and the 'Host IP' of our development server, a Linux box running Debian on which I've created a virtualhost to handle requests to techcrunch.com. It doesn't appear to be working, however, and my expertise has reached its limit. Thanks!

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• Windows Server 2003: Router, DHCP, Looses internet connection

  - by jM2.me

  I have following setup: a windows server 2003 dedicated server with tho nics. One is connected to internet (no modem/router), and second one is connected to private network. Server has DHCP server installed on it and internet nic is being shared for internet access. The problem is sometimes server looses connection to the internet, so same happens to private network. So far I can manually fix it by releasing and renewing IP address. What could be the cause of this problem? DHCP lease from ISP? Thanks

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• Why does my webpage look different when I connect using different routers?! Does routers cache files?

  - by Ayyash

  Here is the case, I am working on a site from office and home, I recently updated the stylesheets and logged in the live site from office (using my same laptop I use all the time), and everything looks okay, I come home use my home internet connection to connect to the site using the SAME laptop, the styles are not updated! The thing is: this happens on ALL browsers, and after emptying the cache many times, and even after one month of work, and even if I have never opened the site before on that browser (as if my router has a cache of its own) Another thing: only one particular styles.css file seem to be hanging Extra info: I use the same IP for my home wireless router as that defined in the office, the usual 192.168.0.1

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• FreeBSD's VPN & Mac OS X IPSecuritas

  - by alexus

  I need to be able to VPN in to my FreeBSD server from my Mac using IPSecuritas. I was wondering if anyone ever done something, I'm reading VPN over IPsec but that mainly covers if you had 2 nodes with 2 public IP address. My endpoint in IPSecuritas configured with MODE_CFG enabled so it'll have the other node to query my address from it's coming from. SSH is out of question, this is not a VPN solution, people who'd end up using VPN wouldn't know what to do, so I need very simple VPN the one that you get to use almost anywhere, you have a client and you have server, client makes a connection to server and boom, you in...

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• nginx automatic failover load balancing

  - by robinmag

  Hi, I'm using nginx and NginxHttpUpstreamModule for loadbalancing. My config is very simple: upstream lb { server 127.0.0.1:8081; server 127.0.0.1:8082; } server { listen 89; server_name localhost; location / { proxy_pass http://lb; proxy_redirect off; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; } } But with this config, when one of 2 backend server is down, nginx still routes request to it and it results in timeout half of the time :( Is there any solution to make nginx to automatically route the request to another server when it detects a downed server. Thank you.

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• Configuring Bind9 on ubuntu

  - by Jerry

  I am trying to configure name server on Ubuntu just for learning. I have followed this tutorial. After configuring bind9 I have restarted it and works well. I have no registered domain name and public IP, so I have used a random domain name(khalidiitdu.com) that is not registered. When I dig khalidiitdu.com, it shows status: NXDOMAIN. If I use nslookup command, it shows ** server can't find khalidiitdu.com: NXDOMAIN. Now question is: Is registered domain mandatory to configure bind9 within a LAN? If not please suggest me alternative ways. Thanks.....

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• Why does Pages.app connect to a server through https and keep the connection open?

  - by ggustafsson

  Every time i start up the program Pages (iWork) it connects to a server through https. What is going on? Why would Apple do this? I use no features under Pages that could warrant this behaviour. It connects to IP address 2.22.240.224 on port 443 and keeps the connection open until i close the application. All the info i can get from Wireshark is a bunch of Apple-related domain names. Edit: The same thing happens with Numbers. I have disabled "Documents & Data" on iCloud so that shouldn't be the reason why. Edit 2: The programs in the iWork suite stopped doing this after recent updates so it's not an issue anymore.

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• VNC unattended Server (No user Interaction)

  - by Louis van Tonder

  I worked on a proof on concept a while ago.... whereby I managed to get VNC going in full "unattended" mode... I.e. The VNC Server dials into the viewer... which is running in Listening mode. The same concept of how single click works, but without the user interaction. I cant seem to locate my source files for this concept I worked on... although I have found my shortcut that worked on the Viewer side to listen. "C:\Program Files\UltraVNC\vncviewer.exe" -listen 5007 /noauto /256colors I can not however remember/locate my demo of what the server is doing.... how to configure it. If I remember correctly, the server was also started with command line params that "dialed" into a remote IP/port, that the viewer is listening on. Any ideas? Thanks

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• Is mumble safe (privacy wise)?

  - by AnonymousLurker

  When chatting on IRC, it is possible to leak data like OS, CPU type if the IRC client happens to leak it in VERSION string. Anybody doing /CTCP VERSION can see it. Same about timezone (/CTCP TIME). This can be mitigated by turning replies to CTCP queries off. Also, IP address is leaked to others (/whois nickname will show it if it's not cloaked). By analogy, does the mumble client expose such sensitive data to others that are connected to the same server? If it does, what are the ways to mitigate this?

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• Getting around broken DNS

  - by Haedrian

  I have someone who's trying to connect to the internet from a connection where the DNS server seems to be down. They can connect if I give them an ip address, but it can't resolve normal names. I tried getting them to change the DNS used from the internet options (setting it to use Google's) - however that didn't work - apparently the isp captures all dns requests. I also tried with a proxy but that didn't work either. Is there another solution to the problem? This isn't a case of censorship or anything, so there's no need to remain anonymous or whatever - I just need a way of 'forcing' the use of another dns server or routing the internet using something else.

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• Are VLANs necessary for my environment?

  - by kleefaj

  Greetings. I'm the new network manager for a school. I've inherited an environment made up of several Windows servers, about 100 Windows clients, ten printers, one Cisco router, six Cisco switches, and 1 HP switch. Also, we're using VoIP. There are four floors in our building. The hosts on each floor are assigned to a separate VLAN. An office on the first floor has its own VLAN. All the switches are on their own VLAN. The IP phones are on their own VLAN. And the servers are on their own VLAN. For the number of hosts on the network, are all these VLANs really buying me anything? I'm new to the VLAN concept but it seems overly complicated for this environment. Or it's genius and I just don't get it. Any thoughts? Thanks, Jeff

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• How to make a server check it's own availability on the web?

  - by Javawag

  Hi all, Just a quick question – my server is running at my house serving www pages at www.javawag.com. The problem is that my home internet connection keeps dropping randomly - for about 10 mins at a time. This is only an intermittent problem and will go away soon I hope. However, my server doesn't recover properly - when the connection comes back, I can still access it at 192.168.0.8 (locally) without any issue, but at www.javawag.com there's no reply! (Just an aside - my home internet connection is dynamic ISP, the domain www.javawag.com points to javawag.dyndns.org which in turn points to my IP, updated every minute by ddclient on the server) Is there some way for the server to check if it's accessible from the outside world periodically, and if not restart Apache/reboot? Oh, and if I reboot the problem fixes itself also! Javawag

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• How to setup dhcp3-server to advertise the DNS server the server itself has got from DHCP?

  - by Ivan

  The Ubuntu 10.04 server has eth0 Internet interface configured by means of an ISP's DHCP. At the same time the server has static eth0 LAN interface to which it provides masquerading (NAT) and LAN-internal DHCP service (dhcp3-server). As far as I've understood the manual, I had to hardcode DNS servers to advertise through LAN DHCP with option domain-name-servers in dhcpd.conf. But what if the ISP changes his DNS server IP silently (we use a SOHO-class ISP, so this won't surprise me much)? Can I configure dhcpd to advertise the DNS server the server uses itself, the one gotten by its DHCP client mechanism?

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• How to make nginx only respond to one domain?

  - by larryzhao

  I am pretty new to nginx, I host my rails application on nginx+passenger. I want my website to be accessible to only one domain. So I set my nginx conf like the following: server { listen 80; server_name mydomain.com www.mydomain.com; root /var/deploy/myapp/current/public; passenger_enabled on; location ~* \.(js|css|png|jpg|jpeg|gif|ico)$ { expires 1y; add_header Cache-Control public; } } I specify the server_name directive, but still, it answers anything which points to this IP and I could see that in the access.log that it answers to other domain names. Is there anything I am doing wrong?

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• Ubuntu 12.04 host lookups extremely slow

  - by tubaguy50035

  I'm having issues with one of my servers taking a long time to look up host names. This is an Ubuntu 12.04 box, so I've tried following the new resolvconf directives. In my /etc/network/interfaces file, I defined my name servers like this: auto eth0 iface eth0 inet static address someaddress netmask 255.255.255.0 gateway 198.58.103.1 dns-nameservers 74.14.179.5 72.14.188.5 In my /etc/resolv.conf, I see these name servers, like this: # Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8) # DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN nameserver 74.14.179.5 nameserver 72.14.188.5 On another box, I edited the resolv.conf directly as directed by my hosts' setup help files. It looks like this: domain members.linode.com search members.linode.com nameserver 72.14.179.5 nameserver 72.14.188.5 options rotate This second box has no issues with host name look ups and responds quite quickly. Could not having the domain and search directives make my look ups slow? By slow, I mean it's taking anywhere from 5 to 15 seconds to find the IP address of a host.

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• How do I make a virtualised WAN?

  - by EnchantedEggs

  I want to create a virtualised WAN. As in, I want to have a couple of VMs (VBox) on one physical host machine, that exist on separate LANs, but that can talk to each other. Do I make the VMs, set them up with different IP addresses (e.g. 1.2.3.4 and 5.6.7.8) and then configure port forwarding between them somehow??? I've seen articles that set up port forwarding on port 2222, but I don't really understand why this works. How is setting up the VM to listen to port 2222 and then port forward from there to, say, port 80, any different from just telling the VM to listen on port 80 in the first place? FYI, the VMs run Ubuntu Desktop 14.x.

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• How to troubleshoot ping request time out [closed]

  - by user28317

  I have a Windows 7 and an XP machine connected to a NETGEAR wireless router. Both machines can log into the network and surf the web. Both are connecting wirelessly. I can ping the router from each machine and get a reply. I can ping each machine from the router and get a reply. But i cannot ping each machine from the other; getting a request time out. Subnet IP Addresses are 192.168.1.* Router =1; Win7 = 10; XP = 11; Firewall is currently off in both systems. Since i can ping from router im picking that not the problem anyway. If i try to ping from xp to win7 i get Request Timed Out. If i try to ping from Win7 to Xp i get destination host unreachable. What should i do now? Thanks

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• Setting up nameserver / DNS with IIS 7 / Windows Server 2008

  - by Mike

  I recently set up my own server; I've got my fixed IP working perfectly publicly. I've got 5 domains that I want pointed at this server. I'm completely lost on what to do: I was told I need to set up a DNS / nameserver on the server via IIS7 / Windows DNS, because I want to host the domains on the server (domains via godaddy). Can anyone help on what to do? Where do I point the domains, what do I set in the DNS? I've searched and searched, and found no tutorials that worked. Thanks!

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