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• sporadic routing to another website when opening a common url

  - by user226098

  I have a strange problem in our office: Sometimes when opening a url from one of our projects random url in any browser not the right website shows up but some other website. In most of the cases it redirects to google.com with some parameters like https://www.google.de/?gfe_rd=cr&ei=krOOU8_kGcSKswadyYDQBw&gws_rd=ssl or just the ugly google 404 page). But today it remains on the origial url but shows up the the content of http://debug.netdna-cdn.com/. This happens about 1 time a week and for no apparent reason. Even stranger it only occurs on a single pc in the network. It now happens on two different computers in the network. Both use windows 8. The problem cannot be fixed by clearing the browser cache but by rebooting the pc or using ipconfig /flushdns. So I think it has something to do with the dns cache of the machine. But I have no idea what the reason is for this and how i can figure out how to solve it. Any ideas?

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• iptables rules to allow HTTP traffic to one domain only

  - by Zenet

  I need to configure my machine as to allow HTTP traffic to/from serverfault.com only. All other websites, services ports are not accessible. I came up with these iptables rules: #drop everything iptables -P INPUT DROP iptables -P OUTPUT DROP #Now, allow connection to website serverfault.com on port 80 iptables -A OUTPUT -p tcp -d serverfault.com --dport 80 -j ACCEPT iptables -A INPUT -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT #allow loopback iptables -I INPUT 1 -i lo -j ACCEPT It doesn't work quite well: After I drop everything, and move on to rule 3: iptables -A OUTPUT -p tcp -d serverfault.com --dport 80 -j ACCEPT I get this error: iptables v1.4.4: host/network `serverfault.com' not found Try `iptables -h' or 'iptables --help' for more information. Do you think it is related to DNS? Should I allow it as well? Or should I just put IP addresses in the rules? Do you think what I'm trying to do could be achieved with simpler rules? How? I would appreciate any help or hints on this. Thanks a lot!

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• iptables rules for DNS/Transparent proxy with ip exceptions

  - by SlimSCSI

  I am running a router (A Netgear WNDR3700 if that matters) with dd-wrt. For content filtering I am using OpenDNS. I wanted to make sure a user could not bypass OpenDNS by putting in their own name servers, so I have a rule to catch all DNS traffic. iptables -t nat -A PREROUTING -i br0 -p all --dport 53 -j DNAT --to $LAN_IP I did have one computer on the network I wanted to allow past OpenDNS filters. On that machine I manually set the name servers, and created another rule to allow it to pass iptables -t nat -I PREROUTING -i br0 -s 192.168.1.2 -j ACCEPT This worked well. Today, I installed a transparent proxy (squid) on the router and added these rules: iptables -t nat -A PREROUTING -i br0 -s $LAN_NET -d $LAN_NET -p tcp --dport 80 -j ACCEPT iptables -t nat -A PREROUTING -i br0 -s ! $PROXY_IP -p tcp --dport 80 -j DNAT --to $PROXY_IP:$PROXY_PORT iptables -t nat -I POSTROUTING -o br0 -s $LAN_NET -d $PROXY_IP -p tcp -j SNAT --to $LAN_IP iptables -I FORWARD -i br0 -o br0 -s $LAN_NET -d $PROXY_IP -p tcp --dport $PROXY_PORT -j ACCEPT This also works, however the 192.168.1.2 address does not get routed through squid. How can I have 192.168.1.2 (and maybe others in the future) by-pass the port 53 rules, but not the port 80 rules?

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• Directory service unavailiable, new hardware same settings

  - by Alex

  I'm working on a project with 2 sites connected by a VPN. Site 1 has the main server and there is a secondary server at site 2 which I am trying to replace. The current setup works perfectly however I can't for the life of me get the replacement server at site 2 up and running. I'm trying to replace like for like just upgraded hardware. I have installed the OS (all Server 2003 Standard SP2) and used exactly the same settings as the old server. I have setup Active Directory, DNS Server, DHCP Server and WINS Server configured. I have used all the same settings as the old server (except IP address and name). I can access the active directory but I can't do anything; add, edit, delete all returns "the directory service is unavaliable". No-one can login on any of the computers on site 2 and the internet is down. Plugging the old server back in and connecting it to the network rectifies the issue (so both new and old are connected at site 2), everyone can login and the internet is back (curious since the modem connects direct to the switch, and even with the new server online I can connect to the router via IP but not the net). I really don't have much experience but I've been roped into doing this because my company is too cheap to hire a real network admin. Any suggestions of where I can start to troubleshoot this, its driving me crazy and I only have a day before all the users are back on site.

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• No internet through a web browser but Skype still works

  - by kim3er

  We get our office broadband through a BT Business Broadband WiFi router. We have a mixture of macs and windows PC/laptops connecting to it at any one time. All devices are able to connect to the wireless signal with pretty much full signal. However, only two computers (one windows, one os x) are able to consistently connect to the internet. The other three (one windows, two os x), while they can always connect to the wifi, exhibit one of three characteristics. No internet at all. Programs like Skype work, but no internet through a browser. Internet works, but with intermittent lag when switching between different sites. I'm assuming while trying to resolve different addresses. Ignoring point 1 for moment, my gut is telling me DNS. It is an up to 20MB line that usually gets to between 13MB and 15MB downstream. The router is capable of dealing with the amount of wireless devices that we're throwing at it. Has anyone got any suggestions for how I might further diagnose this problem (preferably in OS X)? Rich

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• Some websites hosted on my server cant be reached from some places.

  - by valter

  Hello. I have a bloblem that is causing me headaches to solve. I have a webserver at 100tb.com, running CentOS. I also have these nameservers setted up: 67.213.220.170 ns1.maisturismo.net 67.213.220.171 ns2.maisturismo.net My domain is at Godaddy. I added two Host Summary pointig to the nameserver ips... NS1 to the first IP, and NS2 to the second... Than I changed the nameservers of maisturismo.net to ns1.maisturismo.net and ns2.maisturismo.net http://img20.imageshack.us/i/dnswm.jpg/ Bellow the image showing my dns records to maisturismo.net http://img137.imageshack.us/i/nameservers.jpg/ Its strange... Everythink looks fine, but the webiste is not reachable from [zend2.com][1] proxy, and from some other places, like a friend's house, that dont use the same web provider that I use. I have another nameserver setted up on my server, that have the same problem, All websites that use it cant be reached from zend2.com and from my friends house, except a ".com.br"(Brazillian Domain). Do you have same idea about, what is causing this? I really cant imagine what is the problem... Thanks. [1]: http:// zend2.com

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• Growing a small hosting company [closed]

  - by user2353007

  We currently have a few servers, 1 WHM VPS (2GB), 1 MS SQL VPS (2 GB), and 1 IIS VPS (2GB). The VPS servers are doing fine as far as uptime and response times but we would like to add the following features. 1) monitoring with load statistics 2) failover I have looked a Zabbix, Zenoss, Nagios, and a couple of other cloud solutions like monitor.us and watchdog from Zerigo. Ideally for the monitoring solution. Our current hosting company suggested we get a dedicated server or VPS and install load balancing software (not sure I like that idea). I've looked into Rackspace and Amazon load balancers which seem like the most feasible solutions for load balancers. Does anybody have any input on the monitoring and load balancing products I'm looking into? Monitoring should monitor uptime as well as give reports on memory usage, disk usage, processor usage, and which processes/websites/users are responsible for the load. It would be ideal if the load balancer worked with any IP. Not sure if either Rackspace or Amazon load balancers would allow load balancing with servers outside their datacenter. Thank you.

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• Softfail / Failure Notice on SMTP

  - by pascal1954

  Hey, i'm searching for an answer for about 24 hours now and I still can't find any really useful help... The problem appears as the following: I'm running a debian server with Plesk 9.5.3 and qmail. Since a few weeks I'm not able to send mails to some particular servers (like web.de, aol.com). Hence I get failure notices like "Sorry, I wasn't able to establish an SMTP connection." But when I try to send mails to gmail.com - it works! Gmail only reports a softfail in the mail header like so: Received: from h1600XXX.?none? (DOMAIN2.TLD [XX.XXX.XX.XX]) Received-SPF: softfail (google.com: best guess record for domain of transitioning [email protected] does not designate 85.XXX.XX.XX as permitted sender) client-ip=85.XXX.XX.XX This sounds like a dns problem for me, but I can't get an answer for that... What makes me wondering is: h1600XXX is correct, but it should look like h1600XXX.stratoserver.net, not ?none? DOMAIN2.TLD (first line) is different from DOMAIN1 (second line). Both are hosted on this machine, but is this correct? DOMAIN1 is the one I send this mail from. Hopefully someone could help me! If you need more specific information, let me know. Thanks in advance!!! Best regards

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• CNAME vs A records

  - by deb

  I built a small rails app that allow users to make a simple site. It uses subdomain accounts ex: deb.myapp.com Whenever an user wanted to have a domain name associated with their site, they would change their NS records to point to slicehost where the application is hosted and I would manage the DNS records myself. However, as more people are using the application this is not an option for me anymore. I prefer users to keep their nameservers at goddady, register.com, etc, so they can log in and manage their own MX records or whatever else they need to change. My question is, should I have them change the A records to point to my server's ip, or should I have them create a CNAME record? Do they need to delete the default A records to allow the CNAME record to work? Will the A record take precedence and overrule the CNAME record? Thanks in advance. Sorry if this is a very basic question. I've read other posts and I can't find a definite answer.

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• Can't reach only certain websites from my Wifi (with macbook and iphone)

  - by trampj

  I can't access certain websites neither from my macbook nor from my iphone when connected to my Wifi. The same website can be opened from another windows computer connected to the same Wifi. This is what happens when I try to ping it: PING ilpost.it (151.1.175.113): 56 data bytes Request timeout for icmp_seq 0 Request timeout for icmp_seq 1 Request timeout for icmp_seq 2 ... And when I try to traceroute it: host-001:~ j$ traceroute www.ilpost.it traceroute to ilpost.it (151.1.175.113), 64 hops max, 52 byte packets 1 vodafonedslrouter (192.168.1.1) 2.965 ms 0.743 ms 0.745 ms 2 * 2.96.54.77.rev.vodafone.pt (77.54.96.2) 12.076 ms 10.871 ms 3 77.41.30.213.rev.vodafone.pt (213.30.41.77) 14.145 ms 10.693 ms 11.960 ms 4 85.205.11.49 (85.205.11.49) 9.658 ms 8.946 ms 9.085 ms 5 85.205.13.105 (85.205.13.105) 57.497 ms 57.621 ms 48.080 ms 6 188.111.129.17 (188.111.129.17) 49.483 ms 51.338 ms 48.852 ms 7 85.205.25.174 (85.205.25.174) 47.891 ms 49.219 ms 47.821 ms 8 * * * 9 * * * 10 * * * 11 * * * I've flushed my DNS cache but nothing changed. This is quite dramatic as it seems to depend on 85.205.25.174 hop and don't know how to avoid it. Any suggestions? I add that 3 days ago everything worked fine. Then it has stopped.

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• Can't reach only certain websites from my Wifi (with macbook and iphone)

  - by mellin

  I can't access certain websites neither from my macbook nor from my iphone when connected to my Wifi. The same website can be opened from another windows computer connected to the same Wifi. This is what happens when I try to ping it: PING ilpost.it (151.1.175.113): 56 data bytes Request timeout for icmp_seq 0 Request timeout for icmp_seq 1 Request timeout for icmp_seq 2 ... And when I try to traceroute it: host-001:~ j$ traceroute www.ilpost.it traceroute to ilpost.it (151.1.175.113), 64 hops max, 52 byte packets 1 vodafonedslrouter (192.168.1.1) 2.965 ms 0.743 ms 0.745 ms 2 * 2.96.54.77.rev.vodafone.pt (77.54.96.2) 12.076 ms 10.871 ms 3 77.41.30.213.rev.vodafone.pt (213.30.41.77) 14.145 ms 10.693 ms 11.960 ms 4 85.205.11.49 (85.205.11.49) 9.658 ms 8.946 ms 9.085 ms 5 85.205.13.105 (85.205.13.105) 57.497 ms 57.621 ms 48.080 ms 6 188.111.129.17 (188.111.129.17) 49.483 ms 51.338 ms 48.852 ms 7 85.205.25.174 (85.205.25.174) 47.891 ms 49.219 ms 47.821 ms 8 * * * 9 * * * 10 * * * 11 * * * I've flushed my DNS cache but nothing changed. This is quite dramatic as it seems to depend on 85.205.25.174 hop and don't know how to avoid it. Any suggestions? I add that 3 days ago everything worked fine. Then it has stopped.

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• Help - since adding an elastic load balancer to my EC2 web application I cannot connect with the MySQL database (not in AWS)

  - by undefined

  I have a web application that uses an EC2 instance to receive uploaded images, resize and store on S3 and update my MySQL database with the image record. This database is hosted outside Amazon Web Services and so obviously involves communication between the EC2 instance and the database. Images are posted to the upload server from a Flash client which receives the IP address of the upload server when it is loaded and so sends images to 1.12.23.34/resize_script.php This has worked great .. until i started to try and include a load balancer. Since the ELBs do not use an IP address but a DNS address I am now passing this to Flash. Now when I upload images I get the following response from the server - Could not connect to MySQL: Lost connection to MySQL server at 'reading initial communication packet', system error: 111 What might be causing the lost connection to MySQL server. Is there any additional steps I need to take to allow my upload servers to be load balanced? I have set the host property of my MySQL privileges for this user to % any pointers greatly appreciated thanks.

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• Using a .MDF SQL Server Database with ASP.NET Versus Using SQL Server

  - by Maxim Z.

  I'm currently writing a website in ASP.NET MVC, and my database (which doesn't have any data in it yet, it only has the correct tables) uses SQL Server 2008, which I have installed on my development machine. I connect to the database out of my application by using the Server Explorer, followed by LINQ to SQL mapping. Once I finish developing the site, I will move it over to my hosting service, which is a virtual hosting plan. I'm concerned about whether using the SQL Server setup that is currently working on my development machine will be hard to do on the production server, as I'll have to import all the database tables through the hosting control panel. I've noticed that it is possible to create a SQL Server database from inside Visual Studio. It is then stored in the App_Data directory. My questions are the following: Does it make sense to move my SQL Server DB out of SQL Server and into the App_Data directory as an .mdf file? If so, how can I move it? I believe this is called the Detach command, is it not? Are there any performance/security issues that can occur with a .mdf file like this? Would my intended setup work OK with a typical virtual hosting plan? I'm hoping that the .mdf database won't count against the limited number of SQL Server databases that can be created with my plan. I hope this question isn't too broad. Thanks in advance! Note: I'm just starting out with ASP.NET MVC and all this, so I might be completely misunderstanding how this is supposed to work.

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• WordPress: can't access WordPress.com and other external sites?

  - by Rax Olgud

  Hello, I recently started a WordPress blog using hosting at MyDomain (they offer the application "natively"). The blog works fine, however I have two plugins I can't seem to install correctly. First, the WordPress.com Stats plugin requires the API Key. When I input it, I get the following message: Error from last API Key attempt: Your blog was unable to connect to WordPress.com. Please ask your host for help. (transport error - could not open socket: 110 Connection timed out) Second, the Akismet plugin is not configured. When I go to Akismet page to insert my API key, it has the following message: There was a problem connecting to the Akismet server. Please check your server configuration. I assume the two issues are related... I approached my hosting provider about the subject and all they said is that they don't support WordPress, only provide means to install it. To clarify, up to this point I have only been able to install plugins that don't require an API key. What can I do to diagnose the problem and fix it? As a work-around, are there comparable stats and anti-spam plugins that don't require an API key? Many thanks.

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• Time drift in Cloud Server - need to mainpulate GRUB config

  - by Aditya Advani

  We are hosting a VPS on a popular host and are experiencing a regular time drift of several minutes a day forward (approx 7). Linux Kernel: 2.6.18-164.11.1.el5 GNU/Linux Distro: CentOS release 5.4 (Final) We reached out to our hosting provider and their support advised us " This is a known issue with Cloud Servers. To fix this you will need to add one line to your grub config located at: /boot/grub/menu.lst The line you need to add is: noapic nolapic divider=10 nolapic_timer This should correct this issue. You will need to restart after this is added in. " Because I am wary of manipulating grub, mostly I'm terrified that our server may fail to restart - I ask you guys, the pro *nix admins - where exactly in this file does the recommended insertion below: # line from 1&1 for time syncing issue (Case 5163) noapic nolapic divider=10 nolapic_timer go? Please specify where exactly, and whether the order of commands is or is not important. Why is the block below "title CentOS ..." indented? If someone could give me an overview of how this works or point me to a resource that's easy to follow, that's what I'm looking for immediately, a light overview or basic understanding of what I;m doing. If GRUB and bootloaders are a deep dark treasure trove of kernel hacking or something, that's great well-recommended in-depth resources are also very welcome. This is my current /boot/grub/menu.lst # grub.conf generated by anaconda # # Note that you do not have to rerun grub after making changes to this file #boot=/dev/sda # serial --unit=0 --speed=57600 terminal --timeout=5 serial console timeout=5 title CentOS (2.6.18-164.11.1.el5) root (hd0,0) kernel /boot/vmlinuz-2.6.18-164.11.1.el5 ro root=/dev/hda1 console=tty0 console=tty initrd /boot/initrd-2.6.18-164.11.1.el5.img MOST IMPORTANT: I need to know where in the file above it is appropriate to paste the suggested line so I can confidently restart my VPS after manipulating GRUB config

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• Dropped connections between Linux Servers in Data Center

  - by Emil H

  I have a number of linux servers at a us-based datacenter. The servers were installed by the hosting company, and are running fedora core. We're experiencing problems with dropped connections. The issue seems to be that when we attempt to connect to one of the other servers after a period of inactivity, the first connection attempt will fail, and sometimes the second. However, after that the connection succeds and it works for a while. This happens for both mysql connections and raw socket connections, but only seems to occur when connecting to some of our servers. The confusing part is that it some of the servers for which we see different behaviors have identical hardware configuration and software. For example, it happens when connecting to a server called mysql2, but not for a server called mysql3. These servers were installed at the same time, but the same specifications. The problem can be reproduced somewhat reliably, but only after waiting fifteen minutes to half an hour. This makes it hard to diagnose, and even harder since I'm not really sure what to look for. I realize that connections sometimes failed, and that we should write our applications to compensate for this but these servers all in the same data center. Why would it matter if two servers haven't communicated for a while? Does anybody have an idea what might be causing this? Is it a server configuration problem or a network problem that I should contact the hosting company about. What do I tell them to look for? Unfortunately our experience has been that the support staff doesn't investigate problems in depth unless we give them detailed directions.

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• Server 2008R2 in Extra Small Windows Azure Instance?

  - by Shawn Eary

  Windows Azure hosting for an Extra Small (XS) Windows VM seems to come out to be about $10 a month right now. I think this XS instance gives you the equivalent of a 1 GHZ CPU with 768MB of RAM. I think the minimum requirements for Server 2008 is 1GHZ CPU with 512MB of RAM. Also, I think the minimum requirements for SQL Server Express is 1GHZ CPU with 256 MB of RAM and that the minimum requirements for Team Foundation Server Express 11 Beta is 2.2 GHZ CPU with 1 Gig of RAM (this 2.2 GHZ part could be a problem for my 1 GHZ XS VM...). Given the performance of the XS Azure instance, would I be able to install: a very basic MVC web site; a free instance of SQL Server Express; a free single user instance of Team Foundation Server Express 11 Beta and run the XS VM instance without serious crashing? I know there are other Shared WebHost providers that can provide these features for me, but those hosting providers have the following disadvantages: They sometimes cost a lot of money after all of the "addons" are in place They probably don't provide the level of security and employee integrity that Microsoft can provide They don't provide the total control that an Azure VM seems to provide

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• Webserver python update script

  - by ThePyCoder

  So i have made this website on which you can trade stocks based on real stock quotes with virtual money. The stock quotes are in a MySQL database and are updated using a python script which runs every minute or so. Now, this works fine on my local machine with xampp but how about moving the project to a commercial web server? Basically I want my page hosted by a professional company but do those kind of servers support python scripts running in the background? Because a dedicated server would be to expensive and the script does some other sql tasks too so it can't be replaced by PHP or so... So, are there any good web hosting services out there who give me the possibility of running a script in the background and hosting a website in the foreground? For what server specifications do i have to look for? Thnx in advance! PS: I've done some research, and I found a python supporting web host WITH ssh support. Is that what I need? Or is the ssh not allowed to start processes?

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• Host multiple domains with Apache on a VPS

  - by Kunal

  Hi I have recently bought a windows VPS and installed apache, mysql using xampp. All services are running fine. I can access the hosted site using the IP of VPS but what I need to do is host multiple domains on that server. Actually my requirement was to use htaccess on a php based site but the site had to access data from ms sql server as well. So needed to enable php_mssql.dll in the php.ini which no shared hosting was supporting. Had to go for this VPS. Plesk was installed by default but as htaccess wont work with IIS, I had to stop IIS service and install apache there. Now all is well, but I need to find a way to host multiple domains there. When I bought the VPS they hosting people sent me the dedicated IP of the server and also I have the 2 name servers required to host domains. What is the next step? Exactly which file I need to modify to get things done? Please help! Any kind of help is much appreciated. Thanks in advance for all of your kind help and time.

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• What are secure ways of sharing a server (ssh+LAMP) with friends?

  - by Bran the Blessed

  What is the best way to share a virtual server with friends? More precisely, I have the following assets: A virtual private server (Debian Lenny) with root access for myself, running... SSH apache2 mysql Some unused disk space Some friends in need of hosting The problem I would now like to do the following: Hosting one or several domains per friend My friends should have full access to their domains, including running PHP scripts, for example My friends should not be able to poke around in other directories The security of my server should not be compromised by faulty PHP scripts To clarify: I do trust my friends in the sense that they are not trying to do something evil with their access. I just do not trust the programs they are going to run. So, what are your recommendations for establishing such a scenario? Partial solution I already came up with the following plan: Add chrooted SSH users for my friends Add Apache vhosts per user (point the directories to subdirectories of the homedirectories, i.e. /home/alice/example.com, /home/bob/example.net, etc. But how can I enforce a chroot-like environment for the scripts they are running within these vhosts? Any pointers would be appreciated.

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• How to fix "The connection was restarted"?

  - by Altar

  I have a php script with ajax. Few days ago, without making any changes, the script stopped working. The script is working sometimes but it is very slow. Other times it doesn't load completely. Yet other times it loads and empty page or it shows a "The connection was restarted" message. We have tried loading the page from 4 different computers in two different countries (two different ISPs). There is nothing relevant in the server's log. We contacted iPage.com hosting support. We sent screenshots. And all we manage to get from them was an incomplete screenshot and the message 'We tested. The page loads'. So, they won't admit the fault. It looks like they loaded the page once and declared it is working and went back to playing solitaire. I know their support. We had all kind of problems with iPage hosting. My questions are: 1. There is any way to make this error more easy to reproduce? I mean instead of fixing the error to get it appear more often. 2. There is any way to test a server response, to see if it drops connections?

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• Nameserver not resolving or domain not pingable [closed]

  - by Ricky

  Sorry, if anyone can think of a better title please change it! I want to host my own websites from home. For testing purposes, I have a virtual machine running a trial version of Windows Server 2008 Enterprise. Note I currently run a VPS and host my own websites but due to a nice speed upgrade on our line I now want to host from home. I have several domains but I wanted to test with one, that is rickyoleary.com. Our ISP does not provide static IP addresses unless we have a business account so I've been looking at no-ip.com. I admit my networking isn't the best, hence this question but I've been bashing my head all day on this one. I created a host name, muffinbubble.no-ip.org which runs on IP: 86.148.124.15. I've setup IIS on the server with a simple test page. I've then forwarded port 80 traffic from the router and from what I can see, it's working. If I access my website (I was unable to link to this for some reason so please copy and paste this) - http://86.148.124.15/ - I see my test page. So the next step was to create my nameservers. This domain is with namecheap.com so I created my nameservers, ns1.rickyoleary.com and ns2.rickyoleary.com. Both these point to the same IP (and yes, that will be changed after testing), the same IP as above: 86.148.124.15. On the server itself I have set up DNS entries as below which I believe to be correct and added rickyoleary.com and www.rickyoleary.com in the host headers (or bindings) in IIS 7.0. If I try and look up my domain, rickyoleary.com it shows ns1.rickyoleary.com and ns2.rickyoleary.com as the nameservers. I then tried to use just-ping.com on my nameserver ns1.rickyoleary.com. I get 100% packets lost, but the correct IP address is returned (I'm guessing the router does not allow pings, but is still accessible...). I get no response when pinging rickyoleary.com. Here's the problems: I cannot ping ns1.rickyoleary.com or ns2.rickyoleary.com from a command prompt. I'm not sure if this is an issue. When I added the nameservers in Windows Server 2008 and clicked 'resolve' a message box displays stating "No such host is known". I cannot ping rickyoleary.com. rickyoleary.com is not showing my test page on my server. Now - please note, I've waited around 6 hours for propagation. From my experience, although you're told to wait 24 - 48 hours, the changes are normally pretty quick so perhaps I'm being impatient or naive to think it should all be working fine until then. I would really appreciate some help here. Thanks.

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• Intermittent internet access on a flat network - Router is connected

  - by Naveed

  I’m looking for some help with network settings. I’ve just started a new job (non-IT!) and we have problems with our office network. I’m the most IT literate in the organisation (15 permanent employees) and so have been dealing with IT issues. Our main bit of software is web-based so we need constant web access but it sometimes goes down for between 20 minutes and 3 hours despite everything seemingly working fine. It’s a flat network with wireless APs, BT Business Broadband 8Mbit connection and that’s about it. We have no servers and no standard settings and staff are encouraged to bring in their own laptops and connect! The network basically exists to provide internet access and that’s it. We also have students accessing the wireless (and I know there’s a whole list of access and content issues etc but right now we just need internet access stabilised). This is what we have: Building 1 Cisco SLM-224P 24-port PoE 10/100 switch with 2 gigabit ports 3 x ZyXEL NWA-3160 wireless APs Samsung OfficeServ 7100 phone server which borrows the building’s wiring Building 2 Netgear GS605-UK 5-port 10/100/1000 switch 1 x ZyXEL NWA-3160 wireless AP 1 x BT Business Hub – 2wire BT2700hgv – is the DHCP server We have 2 link cables between the buildings. One connects the two switches on a gigabit port. The second (oddly) connects the switch in building 2 to the OfficeServ server in building 1. When the internet goes down I can still access the router through a wireless connection. I can also ping websites and get a response. Firefox just says “Cannot connect” etc. The system then heals itself when it feels like it. (Sorry if this is asking too much but) These are my immediate questions… Why would browser-based internet go down? I don’t know enough about protocols etc but I can try to standardise settings. The WAPs have a DNS server setting and I don’t know whether it should be “None” or “From DHCP”. What should be the DHCP server? The router or the Cisco switch? Or something else?! Would there be any problem in connecting the second link from switch to switch? Is that good practice? Is it worth swapping the Netgear GS605 with either a Cisco SG200-08 or Netgear GS108T-200? Is it worth upgrading the router to, for instance, a Cisco RV042G Dual Gigabit router which would also act as a switch? Or is it better to have a separate router and switch in Building 2?

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• Email can't be sent to my domain

  - by Jack W-H

  Hi Folks, Basically I have my domain howcode.com bought at DomainMonster.com. I have set it all up to point to MediaTemple nameservers and everything works - mostly - fine. I have registered an email address [email protected]. The setup is, I presume, working correctly. I can successfully send emails with the account. And I presume I can receive them - but the problem is, nobody can send them to me. Emailing from a regular, non-Googlemail account appears to work fine but it never arrives in the inbox. But when you email from a GoogleMail address, an error message is instantly returned saying this: Delivery to the following recipient failed permanently: [email protected] 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: 550 550 relay not permitted (state 14). ----- Original message ----- Received: by 10.216.91.12 with SMTP id g12mr3673969wef.77.1271503997091; Sat, 17 Apr 2010 04:33:17 -0700 (PDT) Return-Path: Received: from [192.168.0.3] (client-81-98-94-79.cht-bng-014.adsl.virginmedia.net [81.98.94.79]) by mx.google.com with ESMTPS id x1sm29451927wbx.19.2010.04.17.04.33.15 (version=TLSv1/SSLv3 cipher=RC4-MD5); Sat, 17 Apr 2010 04:33:16 -0700 (PDT) From: Jack Webb-Heller Mime-Version: 1.0 (Apple Message framework v1078) Content-Type: multipart/alternative; boundary=Apple-Mail-7--1008464685 Subject: Re: Hi Date: Sat, 17 Apr 2010 12:33:14 +0100 In-Reply-To: <[email protected] To: Jack Webb-Heller References: <[email protected] Message-Id: <[email protected] X-Mailer: Apple Mail (2.1078) Does this work? On 17 Apr 2010, at 12:32, Jack Webb-Heller wrote: Hi I thought this may be something to do with my MX DNS settings. They are setup like so: MX name: howcode.com TTL: 43200 Type: MX Data: 10 mail.howcode.com. The A-Record for mail.howcode.com is setup like this: Name: mail.howcode.com TTL: 43200 Type: A Data: 205.186.187.129 Is this what's going wrong with the issue? Thanks very much Jack

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• Providing reverse records for records that map to ISP IP

  - by thejartender

  I have been instructed to use my ISP ip (as a temporary fix for mapping my name server and domain records as my router dishes out rfc 1918 adresses to devices in my network where I am running an Ubuntu server, my router and my development laptop andso I have fixed: $TTL 3H @ IN SOA ns.thejarbar.org. email. ( 13112012 28800 3600 604800 38400 ); thejarbar.org. IN A 10.0.0.42 @ IN NS ns.thejarbar.org. yuccalaptop IN A 10.0.0.19 ns IN A 10.0.0.42 gw IN A 10.0.0.138 www IN CNAME thejarbar.org. To a temporary version of: $TTL 3H @ IN SOA ns.thejarbar.org. email. ( 13112012 28800 3600 604800 38400 ); thejarbar.org. IN A 88.89.190.171 @ IN NS ns.thejarbar.org. yuccalaptop IN A 10.0.0.19 ns IN A 88.89.190.171 gw IN A 10.0.0.138 www IN CNAME thejarbar.org. I am using bind and when using named-checkzone on this file according to my zone configurations, this file has no errors. I then run dig thejarbar.org @88.89.190.171 and get an expected authorative reply. My issue is creating my reverse DNS SOA zone and I would gratly appreciate assistance and guidance. I am stuck on how to represent the reverse records correctly for the eddresses that map to my isp IP. I am trying: $TTL 3H 0.0.10.in-addr.arpa. IN SOA ns.thejarbar.org. email. ( 13112012 28800 3600 604800 38400 ); 171.190.89.88. IN PTR thejarbar.org. 171.190.89.88. IN NS ns.thejarbar.org. 19 IN PTR yuccalaptop.thejarbar.org. 138 IN PTR gw.thejarbar.org. www IN PTR www.thejarbar.org. But running named-checkzone on this file leaves an erroneous return that IN: has no NS records I would greatly appreciate assistance

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