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• SPF Failure sending sms message to sms.mycricket.com

  - by CodeGurl

  I built an asp.net application that sends text messages to our employees using carrier-provided email to SMS gateways. The people on Cricket (sms.mycricket.com) are the only ones that are bouncing with a return message like this: Unknown address error SPF FAILURE/Sender has no SPF records: SEE RFC 4408 - FROM check failed: Received: from unknown (HELO servername.domainname.com) ([ipaddress]) by .... with ESMTP/TLS/DHE-RSA-AES256-SHA; 14 Nov 2012 06:22:56 -0600 From my research it looks like we may need to setup something in DNS for the Sender Policy Framework. I'm not in the networking group so I don't know much about this. How can this be done? http://en.wikipedia.org/wiki/Sender_Policy_Framework

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• The vps is running, but the domain name is down ?

  - by Tom

  Hi, i created a vps on vps.net and installed CentOS 5.4 x64 LAMP , i choosed the root password and the server start running, i added my domain name in the vps domain section, also i added the two name servers on where i bought the domain name. the problem is that i still can't access the domain, so i think that's because a mistake in the DNS template that is created automatically by the vps provider, here is it : TYPE | NAME | TARGET | MX PRIORITY | ACTIONS ------------------------------------------------------------------- OA @ dns1.vps.net. NS @ dns1.vps.net. NS @ dns2.vps.net. MX @ mail.www.XXXXXXX.com. 10 delete A @ 85.128.137.292 delete A www 85.128.137.292 delete A mail 85.128.137.292 delete A webmail 85.128.137.292 delete A ftp 85.128.137.292 The vps is working fine, & i can access the webmin panel via the ip, so what's wrong with my parameters? Thanks

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• svn: unknown hostname for hostname that does indeed exist

  - by tipu

  I am running a centos 5 image on the vmware player and as of recently, I was able to check out from a repository that is no longer working. I am now getting: svn: Unknown hostname 'www.kennykong.com' It is a valid hostname and I know this because I have this svn location on Windows and I can browse/checkout no problem. After doing some searching I have (mostly blindly) assumed it's a DNS error because for i in 'grep nameserver /etc/resolv.conf | cut -d " " -f 2' ; do dig @$i domain.com ; done returns done ; <<>> DiG 9.3.6-P1-RedHat-9.3.6-4.P1.el5 <<>> @192.168.1.1 domain.com ; (1 server found) ;; global options: printcmd ;; connection timed out; no servers could be reached I am unsure what to do from here to get my centos to recognize more servers

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• Unable to resolve FQDN, hostname works

  - by HannesFostie

  We are having an issue where computers who are not part of the domain cannot resolve the FQDN of a server (but regular hostname and ip do resolve). The strange thing is that this does work when the computer is added to the network. Our domain name is rather long, its something along the lines of "team.dept.company.com", could that be it? DHCP server passes along the proper DNS, Name and WINS servers, as well as the domain name. I thought that should've solved the problem, but apparently not really. Our domain is still windows2003 EDIT: I am starting to believe I can narrow this down to a problem either with the vmware tools NIC drivers that are embedded in my winPE boot image, or to the fact that I'm trying to do this from inside a VM. Pinging a FQDN at the same time when using a different task sequence on a physical machine works.

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• Can't resolve localhost on Mac OS X Server

  - by iainbeeston

  I have a server running OS X Server 10.5 and it can't resolve localhost to 127.0.0.1. When I try ping this is what happens: ping localhost ping: cannot resolve localhost: Unknown host SSH and web browsers get similar results (uknown host). If I try using 127.0.0.1 or the ip address assigned on the LAN all of the above work. Here's the contents of my /etc/hosts file: cat /etc/hosts ## # Host Database # # localhost is used to configure the loopback interface # when the system is booting. Do not change this entry. ## 127.0.0.1 localhost 255.255.255.255 broadcasthost ::1 localhost fe80::1%lo0 localhost I have no local DNS service running. Does anyone have any idea why this might be happening or how I can fix it?

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• Network issues with DNS not being found

  - by Anriëtte Combrink

  Hi there This is exactly like how our network looks like: Single server with a network router Everything is setup, but I cannot connect our Macs under the Login Options - Join... to this server. Our server's name is Toolbox and I have tried Toolbox.local, Toolbox.private, prepended the afp:// protocol to the name, but nothing, our Macs just don't want to connect this way. Our router has DHCP and gives out all the IP addresses naturally, would I have to add Toolbox.local to the DNS on the router and like it via static internal IP to the server? Our Macs keep giving the following error while trying to join the Network Account Server: Unable to add server Could not resolve the address (2200) What am I doing wrong?

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• Host name resolution on a home network

  - by Kris

  Hi, I have several machines (both virtual and physical) in my internal network at home. Currently I have to connect via 1P addresses. The one main machine I connect with to all the other machines is running Windows Vista. Is there a way I can have some sort of DNS capability inside my network as well so I can refer to these machines with a name? I think this would be a common problem in most households (running a few computers) and I think there might be some simple solutions out there. This would be something most routers should support out of the box - but why don't they? Can anyone recommend some of these or an easy way to accomplish this?

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• Host name resolution on a home network

  - by Kris

  Hi, I have several machines (both virtual and physical) in my internal network at home. Currently I have to connect via 1P addresses. The one main machine I connect with to all the other machines is running Windows Vista. Is there a way I can have some sort of DNS capability inside my network as well so I can refer to these machines with a name? I think this would be a common problem in most households (running a few computers) and I think there might be some simple solutions out there. This would be something most routers should support out of the box - but why don't they? Can anyone recommend some of these or an easy way to accomplish this?

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• Nginx config rewriting subdomain name to 1st URI segment

  - by tim peterson

  I'm unable to do the following nginx.conf rewrite: test.mysite.info to: mysite.info/test here's what i've tried: server { server_name test.mysite.info; rewrite ^ https://mysite.info/test/$request_uri; } I know my DNS (Route53 AWS) is correct b/c: test.mysite.info redirects to mysite.info (just not mysite.info/test) I have an Apache server handling mysite.com which using .htaccess I can rewrite test.mysite.com to mysite.com/test. I haven't changed anything else from the default nginx.conf installation so I'm totally confused as to why such a simple thing isn't working. Here is my full nginx.conf file if that is helpful.

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• DHCLIENT.CONF System variables.

  - by Dr I

  Hello, I've just a little question. My DNS Servers are updated by our DHCP Server (Microsoft Windows 2003 R2 SP2). My clients are Debian Linux Distro's, and I have to modify my DHCLIENT.CONF file on it to send his Full Qualified Hostname. BUT I've about 1600 computers and I don't want to modify each client one by one, then, Could I for exemple use a System Variable on the Config file? Exemple: #DHCLIENT CONF; send "$hostname" where $hostname variable is the alias write on BASHRC for the hostname -f command. If you need any more informations just tell me.

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• OpenVPN on ec2 bridged mode connects but no Ping, DNS or forwarding

  - by michael

  I am trying to use OpenVPN to access the internet over a secure connection. I have openVPN configured and running on Amazon EC2 in bridge mode with client certs. I can successfully connect from the client, but I cannot get access to the internet or ping anything from the client I checked the following and everything seems to shows a successful connection between the vpn client/server and UDP traffic on 1194 [server] sudo tcpdump -i eth0 udp port 1194 (shows UDP traffic after establishing connection) [server] sudo iptables -L Chain INPUT (policy ACCEPT) target prot opt source destination ACCEPT all -- anywhere anywhere ACCEPT all -- anywhere anywhere Chain FORWARD (policy ACCEPT) target prot opt source destination ACCEPT all -- anywhere anywhere Chain OUTPUT (policy ACCEPT) target prot opt source destination [server] sudo iptables -L -t nat Chain PREROUTING (policy ACCEPT) target prot opt source destination Chain POSTROUTING (policy ACCEPT) target prot opt source destination MASQUERADE all -- ip-W-X-Y-0.us-west-1.compute.internal/24 anywhere Chain OUTPUT (policy ACCEPT) target prot opt source destination [server] openvpn.log Wed Oct 19 03:11:26 2011 localhost/a.b.c.d:61905 [localhost] Inactivity timeout (--ping-restart), restarting Wed Oct 19 03:11:26 2011 localhost/a.b.c.d:61905 SIGUSR1[soft,ping-restart] received, client-instance restarting Wed Oct 19 03:41:31 2011 MULTI: multi_create_instance called Wed Oct 19 03:41:31 2011 a.b.c.d:57889 Re-using SSL/TLS context Wed Oct 19 03:41:31 2011 a.b.c.d:57889 LZO compression initialized Wed Oct 19 03:41:31 2011 a.b.c.d:57889 Control Channel MTU parms [ L:1574 D:166 EF:66 EB:0 ET:0 EL:0 ] Wed Oct 19 03:41:31 2011 a.b.c.d:57889 Data Channel MTU parms [ L:1574 D:1450 EF:42 EB:135 ET:32 EL:0 AF:3/1 ] Wed Oct 19 03:41:31 2011 a.b.c.d:57889 Local Options hash (VER=V4): '360696c5' Wed Oct 19 03:41:31 2011 a.b.c.d:57889 Expected Remote Options hash (VER=V4): '13a273ba' Wed Oct 19 03:41:31 2011 a.b.c.d:57889 TLS: Initial packet from [AF_INET]a.b.c.d:57889, sid=dd886604 ab6ebb38 Wed Oct 19 03:41:35 2011 a.b.c.d:57889 VERIFY OK: depth=1, /C=US/ST=CA/L=SanFrancisco/O=EXAMPLE/CN=EXAMPLE_CA/[email protected] Wed Oct 19 03:41:35 2011 a.b.c.d:57889 VERIFY OK: depth=0, /C=US/ST=CA/L=SanFrancisco/O=EXAMPLE/CN=localhost/[email protected] Wed Oct 19 03:41:37 2011 a.b.c.d:57889 Data Channel Encrypt: Cipher 'BF-CBC' initialized with 128 bit key Wed Oct 19 03:41:37 2011 a.b.c.d:57889 Data Channel Encrypt: Using 160 bit message hash 'SHA1' for HMAC authentication Wed Oct 19 03:41:37 2011 a.b.c.d:57889 Data Channel Decrypt: Cipher 'BF-CBC' initialized with 128 bit key Wed Oct 19 03:41:37 2011 a.b.c.d:57889 Data Channel Decrypt: Using 160 bit message hash 'SHA1' for HMAC authentication Wed Oct 19 03:41:37 2011 a.b.c.d:57889 Control Channel: TLSv1, cipher TLSv1/SSLv3 DHE-RSA-AES256-SHA, 1024 bit RSA Wed Oct 19 03:41:37 2011 a.b.c.d:57889 [localhost] Peer Connection Initiated with [AF_INET]a.b.c.d:57889 Wed Oct 19 03:41:39 2011 localhost/a.b.c.d:57889 PUSH: Received control message: 'PUSH_REQUEST' Wed Oct 19 03:41:39 2011 localhost/a.b.c.d:57889 SENT CONTROL [localhost]: 'PUSH_REPLY,redirect-gateway def1 bypass-dhcp,route-gateway W.X.Y.Z,ping 10,ping-restart 120,ifconfig W.X.Y.Z 255.255.255.0' (status=1) Wed Oct 19 03:41:40 2011 localhost/a.b.c.d:57889 MULTI: Learn: (IPV6) -> localhost/a.b.c.d:57889 [client] tracert google.com Tracing route to google.com [74.125.71.104] over a maximum of 30 hops: 1 347 ms 349 ms 348 ms PC [w.X.Y.Z] 2 * * * Request timed out. I can also successfully ping the server IP address from the client, and ping google.com from an SSH shell on the server. What am I doing wrong? Here is my config (Note: W.X.Y.Z == amazon EC2 private ipaddress) bridge config on br0 ifconfig eth0 0.0.0.0 promisc up brctl addbr br0 brctl addif br0 eth0 ifconfig br0 W.X.Y.X netmask 255.255.255.0 broadcast W.X.Y.255 up route add default gw W.X.Y.1 br0 /etc/openvpn/server.conf (from https://help.ubuntu.com/10.04/serverguide/C/openvpn.html) local W.X.Y.Z dev tap0 up "/etc/openvpn/up.sh br0" down "/etc/openvpn/down.sh br0" ;server W.X.Y.0 255.255.255.0 server-bridge W.X.Y.Z 255.255.255.0 W.X.Y.105 W.X.Y.200 ;push "route W.X.Y.0 255.255.255.0" push "redirect-gateway def1 bypass-dhcp" push "dhcp-option DNS 208.67.222.222" push "dhcp-option DNS 208.67.220.220" tls-auth ta.key 0 # This file is secret user nobody group nogroup log-append openvpn.log iptables config sudo iptables -A INPUT -i tap0 -j ACCEPT sudo iptables -A INPUT -i br0 -j ACCEPT sudo iptables -A FORWARD -i br0 -j ACCEPT sudo iptables -t nat -A POSTROUTING -s W.X.Y.0/24 -o eth0 -j MASQUERADE echo 1 > /proc/sys/net/ipv4/ip_forward Routing Tables added route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface W.X.Y.0 0.0.0.0 255.255.255.0 U 0 0 0 br0 0.0.0.0 W.X.Y.1 0.0.0.0 UG 0 0 0 br0 C:>route print =========================================================================== Interface List 32...00 ff ac d6 f7 04 ......TAP-Win32 Adapter V9 15...00 14 d1 e9 57 49 ......Microsoft Virtual WiFi Miniport Adapter #2 14...00 14 d1 e9 57 49 ......Realtek RTL8191SU Wireless LAN 802.11n USB 2.0 Net work Adapter 10...00 1f d0 50 1b ca ......Realtek PCIe GBE Family Controller 1...........................Software Loopback Interface 1 11...00 00 00 00 00 00 00 e0 Teredo Tunneling Pseudo-Interface 16...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter 17...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter #2 18...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter #3 36...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter #5 =========================================================================== IPv4 Route Table =========================================================================== Active Routes: Network Destination Netmask Gateway Interface Metric 0.0.0.0 0.0.0.0 10.1.2.1 10.1.2.201 25 10.1.2.0 255.255.255.0 On-link 10.1.2.201 281 10.1.2.201 255.255.255.255 On-link 10.1.2.201 281 10.1.2.255 255.255.255.255 On-link 10.1.2.201 281 127.0.0.0 255.0.0.0 On-link 127.0.0.1 306 127.0.0.1 255.255.255.255 On-link 127.0.0.1 306 127.255.255.255 255.255.255.255 On-link 127.0.0.1 306 224.0.0.0 240.0.0.0 On-link 127.0.0.1 306 224.0.0.0 240.0.0.0 On-link 10.1.2.201 281 255.255.255.255 255.255.255.255 On-link 127.0.0.1 306 255.255.255.255 255.255.255.255 On-link 10.1.2.201 281 =========================================================================== Persistent Routes: Network Address Netmask Gateway Address Metric 0.0.0.0 0.0.0.0 10.1.2.1 Default =========================================================================== C:>tracert google.com Tracing route to google.com [74.125.71.147] over a maximum of 30 hops: 1 344 ms 345 ms 343 ms PC [W.X.Y.221] 2 * * * Request timed out.

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• WHM new account nameservers not responding

  - by Jae Kun Choi

  I've setup a new account in WHM and updated the nameservers from Domain Registrar and it's not responding from the server. So I went to DNS functions and Nameserver IP's and I have the following ns1.example.com.au No IP 4 ns2.example.com.au No IP 4 I'm not sure whether "NO IP" part is the problem I went in to the domains and they seem to be properly set up. Below is what my Domain Registrar responded with my ticket. those nameservers are either a) offline/not responding or b) not set up correctly as nameservers. Is there a place I can check in WHM to make nameservers respond correctly? The nameservers I updated with above ns1.example.com.au and ns2.example.com.au but it's not working. WHM version is: WHM 11.32.2 (build 18)

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• multiple wildcard entries

  - by Murali

  my client has around 300,000 domains and they just have a wildcard for all of them * A 12.12.12.12 Now they want to create a sub domain that points to a different IP and still have the flexibility of wildcard, something like ww1.* A 24.24.24.24 * A 12.12.12.12 Looks like in BIND, the lower "*" is catch-all and taking over every query and hence ww1 is not working. One of solutions offered by IT folks was to create seperate 300K zones for just "ww1" and leave the "*" wildcard. Are there any other DNS software's that can achieve this task easily? Any other ways to deal?

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• IP tables gateway

  - by WojonsTech

  I am trying to make an iptables gateway. I ordered 3 dedicated server from my hosting company all with dual nics. One server has been given all the ip addresses and is connected directly to the internet and has its other nic connected to a switch where the other servers are all connected also. I want to setup iptables so for example the ip address 50.0.2.4 comes into my gateway server it fowards all the traffic to a private ip address using the second nic. This way the second nic can do what ever it needs and can respond back also. I also want it setup that if any of the other servers needs to download anything over the inernet it is able to do so and by using the same ip address that is used for its incomming traffic. Lastly I would like to be able to setup dns and other needed networking stuff that i maybe not thinking about.

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• Can't resolve localhost on Mac OS X Server

  - by iainbeeston

  I have a server running OS X Server 10.5 and it can't resolve localhost to 127.0.0.1. When I try ping this is what happens: ping localhost ping: cannot resolve localhost: Unknown host SSH and web browsers get similar results (uknown host). If I try using 127.0.0.1 or the ip address assigned on the LAN all of the above work. Here's the contents of my /etc/hosts file: cat /etc/hosts ## # Host Database # # localhost is used to configure the loopback interface # when the system is booting. Do not change this entry. ## 127.0.0.1 localhost 255.255.255.255 broadcasthost ::1 localhost fe80::1%lo0 localhost I have no local DNS service running. Does anyone have any idea why this might be happening or how I can fix it?

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• How do I set up failover for a single web server using two ISPs?

  - by Travis

  I have one web server and two WAN connections (1 cable, 1 DSL). DNS is run offsite, and points to the IP address assigned by one of the ISPs. How can I have the second connection take over when the primary one fails? I have seen that it is possible to have two A records, each pointing to a different IP, but it has several problems. What's the real solution to this? I imagine this is a very common issue. Thanks in advance!

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• Handling range in CNAME

  - by Imran

  We have different set of CNAMEs pointing to different subdomains. These subdomains (a.domain.com, b.domain.com) are pointing to different IPs on different machines. # Server A a1.domain.com pointing to a.domain.com a2.domain.com pointing to a.domain.com .. aN.domain.com pointing to a.domain.com # Server B b1.domain.com pointing to b.domain.com b2.domain.com pointing to b.domain.com .. bN.domain.com pointing to b.domain.com Currently, we have to add individual CNAME entries (eg. a1... aN) against a single subdomain (a.dominan.com). We repeat the above process for every new server which is actually another subdomain (e.g. c.domain.com). Is there a way we can specify a range of CNAMEs (e.g. [a1..a25].domain.com point to a.domain.com) instead of adding separate CNAME etnries? Is there any possibility to handle this at DNS or webserver (apache or Nginx) level?

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• Access to NTP via IP which doesn't change often

  - by faulty

  I'm trying to sync the clock of our production server located in a data center with pool.ntp.org. For security reason, our servers has no internet access unless we requested to open specific ip/port explicitly. I worked out a list of IPs based on 0.asia.ntp.org 1.asia.ntp.org 2.asia.ntp.org 3.asia.ntp.org Not realizing ntp.org is using round robin DNS and the servers being voluntary, they changes from time to time. In fact the IP I've got from 3.asia.ntp.org last month is no longer working now. I'm wondering if there's a publicly known NTP server that doesn't change as often or if there's a way to go around this without having to request an update to the firewall on a monthly basis. I believe many admin is facing the same issue here.

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• Using awstats with a round-robin DNS configuration

  - by Shaun

  I have a website with multiple web servers whose access is controlled via a round-robin DNS. We currently use Google Analytics for site traffic monitoring but were looking to move to awstats due to concerns of inaccuracy with Google Analytics and using third-party trackers in general. I have a little experience with awstats and I know it gets its information from parsing server logs. How would this work when you have multiple web servers logging independently to separate locations? Is this supported with awstats? Is there an alternative I could use to track traffic activity directly on my servers?

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• Insulate hosted client domains from server IP address change?

  - by babtek

  I will be hosting web content for many client domains on a single IP address (with a web hosting company, not inhouse machine). Initially, I must give client some information to configure their registrar to point the domain to my server. I want client domains insulated from a potential IP address change, so if I change hosts/IP address they don't have to reconfigure anything with their registrar. Is this reasonably possible without running my own nameserver? If so, what would be the smartest way to make it happen? Instruct clients to make CNAME record? Use some type of DNS management service that clients would use as a nameserver?

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• Domain of sender address does not resolve (in reply to MAIL FROM command)

  - by horen

  When sending out emails with postfix I sometimes get this error: 451 #4.1.8 Domain of sender address <[email protected]> does not resolve (in reply to MAIL FROM command) The domain mydomain.tld is resolvable though, meaning A, MX, PTR records are set properly. However, the sending server does have a different domain anotherdomain.tld but it is allowed to send emails from mydomain.tld since I set the MX records of mydomain.tld to anotherdomain.tld. The envelope from of the problematic emails is [email protected]. Is there some other dns entry I have to set? Or how else could I solve the problem? (I would like to keep the server structure though)

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• Can not connect to tomcat server externally,

  - by KItis

  My Tomcat server is running on virtual server, this server is running on fedora machine. I have setted up everything on this machine to run tomcat, tomcat working well on local host. but i can not access the wsdl of the webservice running on this tomcat server remotely using IP address of this server, as follows. http://xxx.xxx.xxx.xxx:8080/axis2/services/listServices one of my friend said that i need to configure DNS to access remotely using IP address, i didn't understand what he said also. iptables on this server is also stooped. Also , i can access mysql running on this server remotly, my problem is why doesn't it work for tomcat. could someone can help me to find a solution for this problem. Thanks in advance for any help

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• What is the best way to configure Apache or AWS to support a Rails multi tenancy application that allows each customer to have their own domain name?

  - by Ryan Arneson

  I'm building a Rails 3 SaaS site that allows for multi-tenancy. When a customer signs up they put in their own domain name, e.g. example.com. I need example.com to point to my SaaS application and serve them their content. My questions are as follows: Do I need to create an Apache vhost for each customer using their own domain? Is there an easier way with CNAME's to just have the customer point to the IP address of my server(s) that then forwards the request onto my application through some catch all vhost? Would I be able to create the CNAME record for the customer so they don't have to do any setup? Would this be a case better suited to Amazon Web Services? Any help or explanation or corrections on my understanding of dns would be appreciated. I'm a developer so the server ops portion of this is a bit cloudy.

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• GNU Screen: «unknown command 'vert_split'» though C-a | works

  - by etuardu

  Hi, in GNU-screen (4.00.03jw4 FAU 2-May-06) I'm able to perform a vertical split pressing C-a | (i.e. Ctrl+a, then pipe). Since I'd like to have the screen vertically splitted at the program startup, I put "vert_split" in my .screenrc file, but when I start it I can read «unknown command 'vert_split'» for few seconds in the status bar, and the screen is indeed not splitted. I can't find a solution for this in the manual. Can someone please help me? Thank you.

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• Load balance incoming traffic

  - by justin

  Dear All Please I have the following scenario. 3 servers voip / mail / terminal one load balancing router 2 internet connections (static ip`s) My concern is to load balance incoming traffic since the outgoing traffic is being taking care by the load balancing router. For instance all offices connect to the mail server via the internet same for voip and terminal services. The mail and voip clients are set up with one of the static ip`s and the router forwards the request to the appropriate server. But obviously like this there is no fail over nor load balancing cause all requests are being directed to one internet connection. Anyone has a suggestion was thing of a dns server, does this make sens ? or maybe a hosted option ? Thanks Justin

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