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• IIS 7.5 FTP Service crashes after installation of Advanced Logging 1.0 Module

  - by Jeremy

  I've recently been tasked with setting up two new productions servers for an ASP.Net application. The servers sit behind a F5 Load Balancer, which in turn forwards the end users IP address forward via the standard X_Forwarded_For HTTP Header. All of the reading that I have done suggests that I need to install the IIS Advanced Logging Module in order to take advantage of the X_Forwarded_For HTTP Header. Some quick background: Both of the web servers are Windows 2008 R2 Standard (x64), with IIS 7.5 installed and configured. The FTP Role has also been installed, configured and is operational. The Issue After installing the IIS Advanced Logging module via the Web Platform Installer, I noticed the following Error in the Event Viewer: The FTP Service encountered an error trying to read configuration data from file \?\C:\Windows\system32\inetsrv\config\applicationHost.config, line number 374. The error message is: Unrecognized element 'advancedLogging' Trying to connect over FTP to either of the web servers results in a 530. I've spent 2 hours scouring Google trying to find a solution, short of uninstalling the Advanced Logging Module. As far as I can tell, there is no way to turn off Advanced Logging on a site per site basis. Help would be appreciated.

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• Apache2 - Hosting two sites on the same domain with different ports

  - by user1026361

  I am hosting a staging site (test.mydomain.com) which currently work well on port 80 for two sites (test.mydomain.com and test.FRmydomain.com) I am working on a new backend and I would like to deploy a third site on this server for testing. My hope is that it will live at test.mydomain.com:4204. I've got some experience with apache and quickly added statements: Listen 4204 NameVirtualHost *:4204 and created a new config for my site. What I imagine are the relevant parts of my config: <VirtualHost *:4204 > ServerAdmin [email protected] ServerName test.mydomain.com:4204 However, the site is not publicly available, by name or ip. If i curl localhost:4204 from the server, I get the expected page content At this point, I'm a bit of a loss on how to go forwards. It seems like my config is correct but not available to be served. Am I better off defining a proxy definition so that, for instance: test.mydomain.com/4204 proxies to my localhost server or is there a way to make the site available via the internet? EDIT: I have added an iptable rule after further Googling with the command: iptables -I INPUT -p tcp --dport 4204 -j ACCEPT I can see apache listening on 4204 and the rule is definitely in place but cant reach the site

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• Adding a Second Wireless Router to an Existing Wired Network

  - by KVCrawford

  I apologize ahead of time, I know this has been asked before, but I'm still having problems...maybe you guys can help. I started out with the basic instructions from the highest-voted answer at http://serverfault.com/questions/41572/adding-a-second-wireless-router-to-my-network The new Wireless router in question is a Linksys Wireless-N Gigabit Router, Model # WRT310N Here are the steps I've taken in setting it up: Plug my laptop into LAN port #2 in the new router. Nothing else is connected at this point Configure the new router to be 192.168.1.200 (the original router is 192.168.1.1, and its DHCP clients are from 192.168.1.100-x.x.x.199) Set the internet connection on the new router to "DHCP Client" Turn off the DHCP server & NAT routing on the new router Plug in a LAN cable from the original router into the LAN port #1 on the new router (NOT the WAN port, nothing is plugged in there) Reset the new router Afterwards, I try to ping 192.168.1.1 from the laptop plugged into LAN port #2 on the new router, with no response. 192.168.1.200 garners no response either. Typing "ipconfig" tells me: Autoconfiguration IP Address: 169.254.198.113 Subnet Mask: 255.255.0.0 Default Gateway: 169.254.198.113 What's going wrong? I appreciate any help!

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• Vista WHS Client stopped resolving local names

  - by andrewcr

  I’m running Windows Home Server PP2 in my home, with 3 client computers: two XP and one Vista. I have a router that provides my local DHCP and the server has a static IP address. The other day the Vista machine hung, and on reboot stopped resolving local names. It will show the green home server client icon in the system tray, but if I attempt to log in to the console, I get a “This computer cannot connect to your home server” message. If I ping the server name from the command line, it does not resolve, and gives a “could not find host” message. Oddly enough, if I browse the network, I can see the server, but double clicking on it fails. The other machines on the local network have no problems seeing the server, and the Vista machine has no problems resolving names from the internet, it just can’t see any local machines. I’m aware that I can work around this by adding entries to my HOSTS file (it does work), but I’d like this to work the way it’s “supposed” to. I’m an experienced computer user and developer, but not a networking whiz. Can anyone tell me how local name resolution is supposed to work in my environment and/or suggest ways to troubleshoot this? Thanks, Andy

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• Why is apache serving the default?

  - by Matt

  I keep adding more vhosts and enabling them but all the sites always do to the default vhost in sites-available here is what the default kind of looks like with me only changing the ip for security reasons <VirtualHost 167.889.88.88:80> ServerAdmin webmaster@localhost DocumentRoot /var/www <Directory /> Options FollowSymLinks AllowOverride None </Directory> <Directory /var/www/> Options Indexes FollowSymLinks MultiViews AllowOverride None Order allow,deny allow from all </Directory> ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/ <Directory "/usr/lib/cgi-bin"> AllowOverride None Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch Order allow,deny Allow from all </Directory> ErrorLog /var/log/apache2/error.log # Possible values include: debug, info, notice, warn, error, crit, # alert, emerg. LogLevel warn CustomLog /var/log/apache2/access.log combined Alias /doc/ "/usr/share/doc/" <Directory "/usr/share/doc/"> Options Indexes MultiViews FollowSymLinks AllowOverride None Order deny,allow Deny from all Allow from 127.0.0.0/255.0.0.0 ::1/128 </Directory> </VirtualHost> and here is my other which i named some-site.net <VirtualHost *:80> ServerName some-site.net DocumentRoot "/var/www/vhosts/somesite.com/http/" <Directory "/var/www/vhosts/somesite.com/http/"> AllowOverride all Options -MultiViews </Directory> </VirtualHost> and it turned on my this command sudo a2ensite some-site.net Enabling site some-site.net. Run '/etc/init.d/apache2 reload' to activate new configuration! then i reloaded /etc/init.d/apache2 reload * Reloading web server config apache2 ...done. but when i visit the url some-site.net i get the index page that is for the default vhost...what am i doing wrong

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• Windows server 2008, Dns. I'm confused

  - by Dejan.S

  Hi. I recently setup a window server 2008 server at work. Keep in mind I have never worked with it before:). Background story is I try to host a couple of sites on the server through iis7, I got domains (currently hosted at other hosters for the moment). I want to point the domain NS to my server on all of them. I have read how to setup a DNS on the server, so far so good. now my dns is companyname.com in the server manager I got DNS / companyname.com in there I got ns.comanyname.com, in there I got Host(A) with the server ip now this is where I get confused about how things work with DNS, NS & Host(A). I dont know how to assign(so to speak) the Host(A) to one of my webapps hosted on the iis7, because that is the pointer right?. To leave an example to work with lets say, Hosted.com is hosted on my iis7, on port 81. You don't understand how great full I would be if somebody could explain this confusion. EDIT: Do I need to create a DNS for every site hosted on my server? Or just make a A Host/Record? Thanks guys

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• ISA Server dropping packets as it believes they are spoofed

  - by RB

  We have ISA Server 2004 running on Windows Server 2003 SP2. It has 2 NICs - one internal called LAN on 192.168.16.2, with a subnet of 255.255.255.0, and one external called WAN on 93.x.x.2. The default gateway is 93.x.x.1 (our modem). This machine also accepts VPN connections. We are having a problem with a scanner, which is trying to save a scan into a network share. Every time we try to scan, ISA Server logs the following Denied Connection Log type: Firewall service Status: A packet was dropped because ISA Server determined that the source IP address is spoofed. Rule: Source: Internal ( 192.168.16.54:1024) Destination: Internal ( 192.168.16.255:137) Protocol: NetBios Name Service Pinging 192.168.16.54 from the ISA Server works fine. In ISA Server, going into Configuration → Networks, there are 5 Networks : - External (inbuilt) - Internal (defined as 192.168.16.0 → 192.168.16.255) - Local Host (inbuilt) - Quarantined VPN Clients (inbuilt) - VPN Clients (inbuilt) Finally, under Network Connections → Advanced → Advanced Settings..., the connections are in the following order : - LAN - WAN - [Remote Access Connections] If we try to scan onto a workstation it works fine. Please let me know if you need any more info - many thanks. RB.

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• Dynamic fowarding with SOCKS5 proxy [on hold]

  - by bh3244

  I'm building my own SOCKS5 client and HTTP library and am having trouble figuring out how things work with dynamic port forwarding. So far I can connect successfully with my SOCKS5 client, but from there on I am stuck. I am using the ssh -D command. Considering I have my local machine "home" and my server "server" and I wanted to use "server" as proxy for all connections I understand I would type ssh -D "localport" "serverhostname" on my local machine "home". This command I understand has ssh accept connections with the SOCKS5 protocol. So now if I want to connect to google.com(74.125.224.72:80) and issue a GET for the front page, I assume I would send the SOCKS5 client request and the server would respond back with a 0x00 "succeeded" and from then on I am connected and I would send the HTTP GET request and the server would respond back accordingly with the data. Now if I want to navigate to a different website, must I issue another SOCKS5 connection request for that sites IP/hostname? I'm confused if this is the way it is done, or if there is a program listening on the local port of the "server" and handling outgoing and incoming data. To reiterate: Do SOCKS5 proxies work by sending repeated SOCKS5 connection requests for different addresses or is there just one connection to a local port on "server" and another program on "server" handles the outgoing connection to the internet by using that local port to send and receive data to/from "home"?

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• Bluehost Emails Getting Blocked

  - by colithium

  A site for my client has the run-of-the-mill "website with users" email pattern. Create an account, get an activation email. Get an email when a subscription is expiring, etc. The site is hosted on Bluehost and currently it uses php's mail() function. There isn't much configuration that is allowed (as far as I know). The trouble is, about a third of these emails disappear into the void. They aren't in spam or junk folders, there's no bounce message, they just cease to exist. I've read about Bluehost email troubles but I can't figure out what my options are for fixing it. These aren't marketing emails, ie they have user-specific information contained within them. I suppose if a solution offers a good templating system that would be fine. What are my options? Excerpt of headers when delivered to a Gmail address: Received-SPF: neutral (google.com: 00.000.000.000 is neither permitted nor denied by best guess record for domain of domain@box###.bluehost.com) client-ip=00.000.000.000; DomainKey-Status: good Authentication-Results: mx.google.com; spf=neutral (google.com: 00.000.000.000 is neither permitted nor denied by best guess record for domain of domain@box###.bluehost.com) smtp.mail=domain@box###.bluehost.com; domainkeys=pass [email protected]

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• Cannot login to ISCSI Target - hangs after sending login details

  - by Frank

  I have an ISCSI target volume, to which i am trying to connect using CentOS Linux server. Everything works fine, but cannot its stuck at login. Here are the steps i am performing: [root@neon ~]# iscsiadm -m node -l iscsiadm: could not read session targetname: 5 iscsiadm: could not find session info for session20 iscsiadm: could not read session targetname: 5 iscsiadm: could not find session info for session21 iscsiadm: could not read session targetname: 5 iscsiadm: could not find session info for session22 iscsiadm: could not read session targetname: 5 iscsiadm: could not find session info for session23 iscsiadm: could not read session targetname: 5 iscsiadm: could not find session info for session30 iscsiadm: could not read session targetname: 5 iscsiadm: could not find session info for session31 iscsiadm: could not read session targetname: 5 iscsiadm: could not find session info for session78 iscsiadm: could not read session targetname: 5 iscsiadm: could not find session info for session79 iscsiadm: could not read session targetname: 5 iscsiadm: could not find session info for session80 iscsiadm: could not read session targetname: 5 iscsiadm: could not find session info for session81 Logging in to [iface: eql.eth2, target: iqn.2001-05.com.equallogic:0-8a0906-ab4764e0b-55ed2ef5cf350a66-neon105, portal: 10.10.1.1,3260] (multiple) After this step, its stucks, waits for some time and then gives this output: Logging in to [iface: iface1, target: iqn.2001-05.com.equallogic:0-8a0906-ab4764e0b-55ed2ef5cf350a66-neon105, portal: 10.10.1.1,3260] (multiple) iscsiadm: Could not login to [iface: eql.eth2, target: iqn.2001-05.com.equallogic:0-8a0906-ab4764e0b-55ed2ef5cf350a66-neon105, portal: 10.10.1.1,3260]. My iscsi.conf is this: node.startup = automatic node.session.timeo.replacement_timeout = 15 # default 120; RedHat recommended node.conn[0].timeo.login_timeout = 15 node.conn[0].timeo.logout_timeout = 15 node.conn[0].timeo.noop_out_interval = 5 node.conn[0].timeo.noop_out_timeout = 5 node.session.err_timeo.abort_timeout = 15 node.session.err_timeo.lu_reset_timeout = 20 node.session.initial_login_retry_max = 8 # default 8; Dell recommended node.session.cmds_max = 1024 # default 128; Equallogic recommended node.session.queue_depth = 32 # default 32; Equallogic recommended node.session.iscsi.InitialR2T = No node.session.iscsi.ImmediateData = Yes node.session.iscsi.FirstBurstLength = 262144 node.session.iscsi.MaxBurstLength = 16776192 node.conn[0].iscsi.MaxRecvDataSegmentLength = 262144 discovery.sendtargets.iscsi.MaxRecvDataSegmentLength = 32768 node.conn[0].iscsi.HeaderDigest = None node.session.iscsi.FastAbort = Yes Also, in access control, i have given full access to Any IP, Any CHAP user and fixed iscsi initiator name. With same access level, all other volumes on rest of servers are working, except this one.

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• Hosting websites in our Workplace custom-built datacentre

  - by i.h4d35

  I'm faced with unique learning opportunity at work at the moment. Due to the slowdown (amongst other reasons), the powers that be at my office have decided to abandon our shared hosting providers (both shared and dedicated hosting) and have decided to host the websites at our office's datacentre. We're running 7 websites, wherein the average unique hits per day at the moment is about 900. We have 2 servers set aside for this - one is a DELL POWER EDGE 1850 (Intel Xeon 3 GHZ*2, 4GB RAM, 73GB HDD and the other is an HP DL 380 G3 (Intel Xeon 2.8 GHz, 6 GB RAM, 73 GB HDD) a) I would like to know the pros and cons of going ahead with this project.All the sites will be hosted on a single IP. In all probability, the OS is going to be CentOS. b) Do you think I should consider Virtualization into this equation (KVM/Xen)? I was thinking in terms of separate instances of the DB server and the frontend though I do not know if this is the best way to go. c) Should I be trying to use cloud stacks like OpenStack and try to make it look like websites hosted on some sort of Public Cloud? (something that I checked out here). Here is something else I came across, which looks similar to what needs to be done at our office. About the websites - Of the 7 websites, 4 are basic static websites which basically gives a whole lot of information about a few local institutions. The remaining 3 are local product-based websites developed in PHP wherein end user can view products and order them online. I am trying to take this as a learning experience wherein I can learn to build something from scratch and save the company a little something in the process. The migration needs to be completed by Easter so I guess it gives us some time (or am I being overly optimistic??). I am confused here and would appreciate all the help I can get. Thanks in advance.

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• Cannot connect to Solaris Server when Oracle GoldenGate process uses the port

  - by Abdallah Ghrb

  I'm trying to test the Oracle goldengate to replicate data between two databases on the same server. So I installed two databases and two goldengate homes in the same machine. The goldengate processes are started from each home and they are responsible for the replication : Process from home 1 configured on port 7809 & process for home 2 configured on port 7810. For a successful replication, processes started from goldengate home 1 should communicate with processes started from goldengate home 2. But for some reasons, this is not happening. The goldengate log file has the following error : OGG-01223 Oracle GoldenGate Capture for Oracle, exthrr.prm: TCP/IP error 131 (Connection reset by peer). "Googling" for this error, it said that the connection occurred but the host terminated it. Tried to telnet the machine with the used port and it gave the following error: bash-3.00$ telnet 10.10.3.124 7810 Trying 10.10.3.124... Connected to 10.10.3.124. Escape character is '^]'. Connection to 10.10.3.124 closed by foreign host. Here the communication occurs but for only around 3 seconds then it is closed by the host, which is the same explanation of the above error in the goldengate log file. I tried to change the port but still the same error. The problem is happening only when the goldengate process is using the port. When other process is using the same port, I can telnet successfully.

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• IIS7 binding to subdomain causing authentication errors

  - by Tommy Jakobsen

  I'm trying to bind a IIS web site to a subdomain, which is causing authentication errors. First I'll explain what I've done to set it up. This is the fist time I do this, so please correct me if I'm wrong. The web server is a stand-alone Windows Server 2008 R2 x64, running IIS7 with .NET Framework 4. I have the following A-records, pointing to my server: server.mydomain.com *.server.mydomain.com So all subdomains of server.mydomain.com points to the server. In IIS7 I have a web site on port 8080, with a virtual directory (named virtual) that is using Windows Authentication. I have one binding on the web site pointing to all unassigned IP addresses, port 8080 and having a host name of sub.server.mydomain.com. Now, shouldn't I be able to access the virtual directory through: http://sub.server.mydomain.com/virtual That is not working. However, I can access it through: http://sub.server.mydomain.com:8080/virtual But, it won't let me authenticate using a Windows account (Server\Username). A windows account that I can authenticate with, when accessing the site through http://localhost:8080/virtual. What am I missing here?

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• Very slow connection to xserve via afp or smb

  - by Mhoffman13

  Help. File transfer and connection speed to our Xserve are painfully slow from newly purchased iMacs. The Xserve is only used as a file server, its running 10.4.11. The problem seems to be only happening on brand new iMacs running 10.6.3. When connected either over afp or smb copying files is many times slower than usual. Other machines on the network running either 10.4 or 10.5 have a normal connection speed. To try to rule out OS incompatibility I connected the new iMac running 10.6 to another computer running 10.4 over the network. The file transfer speed was fast as normal. So it seems the problems lies with the X serve (maybe). The afp logs either access or error don't show anything unusual. One thing that did look different was when the imac was connected to the Xserve the user had its id listed as its IP address. The other machines connected, had the id of broadcasthost. I also noticed that when connected from the new iMac I can only see one of the mirrors. When any other computer connects both mirrors are shown. Tried a restart of the Xserve but the problem persists. Thanks in advance for any advice

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• Is it worthwhile to block malicious crawlers via iptables?

  - by EarthMind

  I periodically check my server logs and I notice a lot of crawlers search for the location of phpmyadmin, zencart, roundcube, administrator sections and other sensitive data. Then there are also crawlers under the name "Morfeus Fucking Scanner" or "Morfeus Strikes Again" searching for vulnerabilities in my PHP scripts and crawlers that perform strange (XSS?) GET requests such as: GET /static/)self.html(selector?jQuery( GET /static/]||!jQuery.support.htmlSerialize&&[1, GET /static/);display=elem.css( GET /static/.*. GET /static/);jQuery.removeData(elem, Until now I've always been storing these IPs manually to block them using iptables. But as these requests are only performed a maximum number of times from the same IP, I'm having my doubts if it does provide any advantage security related by blocking them. I'd like to know if it does anyone any good to block these crawlers in the firewall, and if so if there's a (not too complex) way of doing this automatically. And if it's wasted effort, maybe because these requests come from from new IPs after a while, if anyone can elaborate on this and maybe provide suggestion for more efficient ways of denying/restricting malicious crawler access. FYI: I'm also already blocking w00tw00t.at.ISC.SANS.DFind:) crawls using these instructions: http://spamcleaner.org/en/misc/w00tw00t.html

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• Prevent outgoing traffic unless OpenVPN connection is active using pf.conf on Mac OS X

  - by Nick

  I've been able to deny all connections to external networks unless my OpenVPN connection is active using pf.conf. However, I lose Wi-Fi connectivity if the connection is broken by closing and opening the laptop lid or toggling Wi-Fi off and on again. I'm on Mac OS 10.8.1. I connect to the Web via Wi-Fi (from varying locations, including Internet cafés). The OpenVPN connection is set up with Viscosity. I have the following packet filter rules set up in /etc/pf.conf # Deny all packets unless they pass through the OpenVPN connection wifi=en1 vpn=tun0 block all set skip on lo pass on $wifi proto udp to [OpenVPN server IP address] port 443 pass on $vpn I start the packet filter service with sudo pfctl -e and load the new rules with sudo pfctl -f /etc/pf.conf. I have also edited /System/Library/LaunchDaemons/com.apple.pfctl.plist and changed the line <string>-f</string> to read <string>-ef</string> so that the packet filter launches at system startup. This all seems to works great at first: applications can only connect to the web if the OpenVPN connection is active, so I'm never leaking data over an insecure connection. But, if I close and reopen my laptop lid or turn Wi-Fi off and on again, the Wi-Fi connection is lost, and I see an exclamation mark in the Wi-Fi icon in the status bar. Clicking the Wi-Fi icon shows an "Alert: No Internet connection" message: To regain the connection, I have to disconnect and reconnect Wi-Fi, sometimes five or six times, before the "Alert: No Internet connection" message disappears and I'm able to open the VPN connection again. Other times, the Wi-Fi alert disappears of its own accord, the exclamation mark clears, and I'm able to connect again. Either way, it can take five minutes or more to get a connection again, which can be frustrating. Why does Wi-Fi report "No internet connection" after losing connectivity, and how can I diagnose this issue and fix it?

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• Running docker in VPC and accessing container from another VPC machine

  - by Bogdan Gaza

  I'm having issues while running docker in AWS VPC. Here is my setup: I've got two machines running in VPC: 10.0.100.150 10.0.100.151 both having an elastic IPs assigned to them, both running in the same internet enabled subnet. Let's say I'm running a web server that serves static files in a container on the 10.0.100.150 machine the container: IP: 172.17.0.2 port 8111 is forwarded on the 8111 port on the machine. I'm trying to access the static files from my local machine (or another non-VPC machine also tried an EC2 instance not running in the VPC) and it work flawlessly. If I try to access the files from the other machine (10.0.100.151) it hangs. I'm using wget to pull the files. Tried to debug it with tcpdump and ngrep and that I have seen is that the request reaches the container. If I ngrep on the host machine I see the requests going in but no response going back. If I ngrep on the container I see the requests going in and the response going back. I've tried multiple iptables setups (with postrouting enabled, with manually forwarding ports etc) but no success. Help in any way - even debugging directions would be much appreciated. Thanks!

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• Multiple Set Peer for VPN Failover

  - by Kyle Brandt

  I will have two Cisco routers at Location A serving the same internal networks, and one router in location B. Currently, I have one router in each location with a IPSec site-to-site tunnel connecting them. It looks something like: Location A: crypto map crypto-map-1 1 ipsec-isakmp description Tunnel to Location B set peer 12.12.12.12 set transform-set ESP-3DES-SHA match address internal-ips Location B: crypto map crypto-map-1 1 ipsec-isakmp description Tunnel to Location A set peer 11.11.11.11 set transform-set ESP-3DES-SHA match address internal-ips Can I achieve fail over by simply adding another set peer at location B?: Location A (New secondary Router, configuration on previous router stays the same): crypto map crypto-map-1 1 ipsec-isakmp description Tunnel to Location B set peer 12.12.12.12 set transform-set ESP-3DES-SHA match address internal-ips Location B (Configuration Changed): crypto map crypto-map-1 1 ipsec-isakmp description Tunnel to Location A set peer 11.11.11.11 ! 11.11.11.100 is the ip of the new second router at location A set peer 11.11.11.100 set transform-set ESP-3DES-SHA match address internal-ips Cisco Says: For crypto map entries created with the crypto map map-name seq-num ipsec-isakmp command, you can specify multiple peers by repeating this command. The peer that packets are actually sent to is determined by the last peer that the router heard from (received either traffic or a negotiation request from) for a given data flow. If the attempt fails with the first peer, Internet Key Exchange (IKE) tries the next peer on the crypto map list. But I don't fully understand that in the context of a failover scenerio (One of the routers as Location A blowing up).

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• How to recover a Linksys WRT54GL router that has a blinking green power LED and no response from the

  - by Peter Mounce

  I was flashing the router with the Tomato firmware, but something went wrong; I'm not sure what. Now, the router responds to ping at 192.168.1.1 (my Mac's on a static IP 192.168.1.21), but the web-interface doesn't come up. I have read that this situation is recoverable in a [couple of places][2], but I haven't been having much success and so I wondered whether anyone could help. From my Mac (OSX 10.5) I have tried to tftp a new vanilla-Linksys firmware to the router and reboot; according to the trace, this sends it but the router behaves no differently after a reboot. I've read that if boot_wait is turned on, I'll have an easier time, but I haven't been able to find any instructions that tell me how I can tell whether I did this or not (I don't think I have, but I might have, when I tinkered the first time months ago - the router has worked since then, though). I have found a couple of references to [something called JTAG][3], which seems like some kind of [homebrew diagnostic cable thing][4], but that's a little beyond my ken. Happy to try it, with muppet-level instructions, though (I do software, not hardware!). So, I'm at a bit of a loss, really, and wondered whether anyone could provide me with the route (ha. ha.) out of this mess? Hm, I can't post all the links I wanted to until I have some more reputation.

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• Debian DNSSEC - howto secure a domain?

  - by Daniel Marschall

  I have a beginner question about DNSSEC. I have much experience with TLS and cryptography-stuff and would like to try out this new technology. I have googled very much about this but I haven't found useful information for me. I think one confusion in information gathering is that "Debian howto DNSSEC setup" can mean "How to USE DNSSEC for resolving" OR "How to secure your domain with DNSSEC". I am searching the second. I am running a Debian Squeeze server with root privileges which has a domain name ending with ".de" (which is already signed by the root zone). The network interface at this server uses the gateway IP (DNS resolver?) of the datacentre the server is running on. My domain is hosted at freedns.afraid.org , where I can add DNS RRs for my domain. They are currently NOT capable of adding DNSSEC RRs, but I am bugging them to support this soon. ;-) My simple question is: How do I setup DNSSEC on Debian? Resp. who have I ask to? As far as I understand, all I have to do is to run dnssec-keygen on my Debian server and then add the key to my DNS-provider as DNSSEC RR. (And change it every 30 days?) I have looked at this http://www.isc.org/files/DNSSEC_in_6_minutes.pdf but it looks like you have to be the owner of a ZONE, so I don't think this applies to me. Who needs to sign my domain? My DNS-provider or my zone (DeNIC) or can I do it myself? Any help is very appreciated!

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• Router recommendation to virtualize 800 IPs

  - by delerious010

  I've recently been looking at getting some new load balancers for our environment as we are expecting to double our client base in the next 12 months. Currently we have 400 public IPS serving 800 clusters ( 2 clusters / IP due to ports ) on Coyote Point Balancers, and distributing connections to 3 web servers serving about 6GBytes outgoing, 2Gbytes in per day. If we double, this would be about 800 IPs, possibly 1600 clusters, and about 6 servers per cluster ( for a total of 9600 so called "real servers" using Barracuda's lingo ). Due to the amount of clusters, most solutions I've looked at ( Coyote, Barracuda, Loadbalancer.org ) seem to be unsure whether they'll be able to handle our planned growth, mostly due to health checks performed on the servers ... which makes total sense when you think of it. So the fine folk at loadbalancer.org recommended that we may be better off offload the 400-800 public IPs, which we require for SSL eCommerce solutions, over to a forward facing router. From that point on, the router could do some mangling to route EXT_IP:443 to INT_IP:INT_PORT which would then allow us to reduce the Load Balancer configuration to 1 or 2 clusters, thus resolving the health check problem. Does this idea make sense to yall ? Or would you have other recommendations to make ? Secondly, what router would you recommend for such an undertaking ? I'd be looking at something that has some form of failover mechanism built in. On a totally unrelated note, I've got to admit that I'm extremely pleased with the responses I got from loadbalancer.org. Their responses to my inquiries were surprisingly helpful ( i.e. I didn't feel as if I was taking to a sales guy trying to push something ). ( No I don't work for them, and sadly nor are they sending me free gear ).

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• How does Windows 7 DNS client work?

  - by Mark Allison

  I am using a local DHCP and DNS server on my home network on a linux machine. It is running CentOS 6.3 with dnsmasq 2.48. It's all working fine except for local DNS lookups for Windows machines only. I have a mix of Ubuntu, CentOS and Windows machines on the network, some virtual, some physical. I have a machine called boron and the domain is called localdomain If I ping boron from any linux machine, I get [root@lithium lists]# ping -c3 boron PING boron.localdomain (10.0.0.5) 56(84) bytes of data. 64 bytes from boron.localdomain (10.0.0.5): icmp_seq=1 ttl=64 time=0.740 ms 64 bytes from boron.localdomain (10.0.0.5): icmp_seq=2 ttl=64 time=0.478 ms 64 bytes from boron.localdomain (10.0.0.5): icmp_seq=3 ttl=64 time=0.458 ms --- boron.localdomain ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 2000ms rtt min/avg/max/mdev = 0.458/0.558/0.740/0.131 ms If I do it from my Windows 7 machine, I get: Ping request could not find host boron. Please check the name and try again. If I try ping boron.localdomain I get: Pinging boron.localdomain [67.215.65.132] with 32 bytes of data: Reply from 67.215.65.132: bytes=32 time=16ms TTL=57 Reply from 67.215.65.132: bytes=32 time=188ms TTL=57 Reply from 67.215.65.132: bytes=32 time=15ms TTL=57 Reply from 67.215.65.132: bytes=32 time=14ms TTL=57 Ping statistics for 67.215.65.132: Packets: Sent = 4, Received = 4, Lost = 0 (0% loss), Approximate round trip times in milli-seconds: Minimum = 14ms, Maximum = 188ms, Average = 58ms which is clearly wrong. Why is it going out to the internet? Why can't my windows machine resolve the boron hostname to a FQDN? My Windows machines and linux machines get their network config from DHCP. UPDATE If I do ipconfig /all in Windows, it looks as I would expect: Windows IP Configuration Host Name . . . . . . . . . . . . : lanthanum Primary Dns Suffix . . . . . . . : Node Type . . . . . . . . . . . . : Hybrid IP Routing Enabled. . . . . . . . : No WINS Proxy Enabled. . . . . . . . : No DNS Suffix Search List. . . . . . : .localdomain Ethernet adapter Local Area Connection: Connection-specific DNS Suffix . : .localdomain Description . . . . . . . . . . . : Realtek PCIe GBE Family Controller Physical Address. . . . . . . . . : 50-E5-49-38-FC-A2 DHCP Enabled. . . . . . . . . . . : Yes Autoconfiguration Enabled . . . . : Yes IPv4 Address. . . . . . . . . . . : 10.0.0.57(Preferred) Subnet Mask . . . . . . . . . . . : 255.255.255.0 Lease Obtained. . . . . . . . . . : 23 August 2012 13:58:45 Lease Expires . . . . . . . . . . : 24 August 2012 07:58:48 Default Gateway . . . . . . . . . : 10.0.0.6 DHCP Server . . . . . . . . . . . : 10.0.0.6 DNS Servers . . . . . . . . . . . : 10.0.0.6 208.67.222.222 208.67.220.220 NetBIOS over Tcpip. . . . . . . . : Enabled When I do an nslookup I get: Server: carbon.localdomain Address: 10.0.0.6 *** carbon.localdomain can't find boron: Unspecified error However if I do ifconfig -a in Linux I get: [root@nitrogen ~]# ifconfig -a eth0 Link encap:Ethernet HWaddr 00:0C:29:AF:EC:2A inet addr:10.0.0.7 Bcast:10.0.0.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:187687 errors:0 dropped:0 overruns:0 frame:0 TX packets:5857 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:23910700 (22.8 MiB) TX bytes:712964 (696.2 KiB) lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:329894 errors:0 dropped:0 overruns:0 frame:0 TX packets:329894 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:67153143 (64.0 MiB) TX bytes:67153143 (64.0 MiB) and nslookup: [root@nitrogen ~]# nslookup boron Server: 10.0.0.6 Address: 10.0.0.6#53 Name: boron Address: 10.0.0.5 Both machines are on the same network using the same DHCP server. UPDATE 2 I thought the issue was resolved but I am getting intermittent DNS resolving issues but only on my Windows 7 machine. All my linux boxes are fine. This is what happens when I ping and nslookup from Windows to a Windows 2008 Server: C:\Users\mark>nslookup magnesium Server: carbon.localdomain Address: 10.0.0.6 Name: magnesium.localdomain Address: 10.0.0.12 C:\Users\mark>ping magnesium Pinging magnesium.localdomain [67.215.65.132] with 32 bytes of data: Reply from 67.215.65.132: bytes=32 time=267ms TTL=57 Reply from 67.215.65.132: bytes=32 time=162ms TTL=57 Reply from 67.215.65.132: bytes=32 time=510ms TTL=57 Reply from 67.215.65.132: bytes=32 time=146ms TTL=57 Ping statistics for 67.215.65.132: Packets: Sent = 4, Received = 4, Lost = 0 (0% loss), Approximate round trip times in milli-seconds: Minimum = 146ms, Maximum = 510ms, Average = 271ms And from Linux: [root@beryllium ~]# ping -c4 magnesium PING magnesium.localdomain (10.0.0.12) 56(84) bytes of data. 64 bytes from magnesium.localdomain (10.0.0.12): icmp_seq=1 ttl=128 time=0.176 ms 64 bytes from magnesium.localdomain (10.0.0.12): icmp_seq=2 ttl=128 time=0.634 ms 64 bytes from magnesium.localdomain (10.0.0.12): icmp_seq=3 ttl=128 time=0.685 ms 64 bytes from magnesium.localdomain (10.0.0.12): icmp_seq=4 ttl=128 time=0.263 ms --- magnesium.localdomain ping statistics --- 4 packets transmitted, 4 received, 0% packet loss, time 3002ms rtt min/avg/max/mdev = 0.176/0.439/0.685/0.223 ms [root@beryllium ~]# nslookup magnesium Server: 10.0.0.6 Address: 10.0.0.6#53 Name: magnesium.localdomain Address: 10.0.0.12 UPDATE 3 I stopped the Windows DNS client on my Windows 7 machine with net stop dnscache and it is now working fine. It would be nice to get DNS working with the DNS client on, but I might be OK without it, what do you think?

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• DNS-Based Environment Determination

  - by zvolkov

  Found the following here. The questions is: where can I find more details on how exactly implement this on Windows? Any guide or how-to anybody? Or maybe you can provide your invaluable suggestions? Specifically, how do I make so that "all QA servers would first resolve entries in qa.example.com first and then if that lookup failed they would try example.com" (I'm a dev, not a DNS specialist, but our IT Support has refused to help on this:() Use DNS Based Environment Determination for your servers. Do this by initially splitting your top level domain into a number of sub domains depending on their function, and then creating DNS Service Names in each of the sub domains pointing to the relevant server for that service. Based on the list above we would then have: * clientdb.prod.example.com for Production * clientdb.perf.example.com for Performance Testing * clientdb.qa.example.com for QA * clientdb.dev.example.com for Development Servers then resolve entries in their relevant sub domain by function. That is, all QA servers would first resolve entries in qa.example.com first and then if that lookup failed they would try example.com. This allows you to have a single configuration entry for your client database hostname (clientdb) that would resolve correctly in all environments. This technique has the added advantage of still having global services defined in a common top level domain. This seems to be related to Providing "split horizon" DNS service. Reading that, I see that I will probably need separate DNS Server for each environment. Is this true or does Windows support some form of "tagging" the records to be visible depending on the requestor's IP?

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• Solaris 10: cannot ping to/from server

  - by anurag kohli

  All, I have a Solaris 10 server which is not reachable by IP (ie can't ping to/from the server). I believe I have the default route setup correctly. See below: # ifconfig -a lo0: flags=2001000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4,VIRTUAL> mtu 8232 index 1 inet 127.0.0.1 netmask ff000000 bge0: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 2 inet 192.168.62.100 netmask ffffff00 broadcast 192.168.62.255 ether 0:14:4f:b1:9b:30 # netstat -rn Routing Table: IPv4 Destination Gateway Flags Ref Use Interface -------------------- -------------------- ----- ----- ------ --------- 192.168.62.0 192.168.62.100 U 1 40 bge0 224.0.0.0 192.168.62.100 U 1 0 bge0 default 192.168.62.1 UG 1 0 127.0.0.1 127.0.0.1 UH 1 4 lo0 # # cat /etc/defaultrouter 192.168.62.1 I have verified layer1 and layer 2 are up on the switchport, and that it's on the correct VLAN. I have also checked the default gateawy (192.168.62.1) is in fact reachable since I can ping it from my PC: Pinging 192.168.62.1 with 32 bytes of data: Reply from 192.168.62.1: bytes=32 time=1ms TTL=254 Reply from 192.168.62.1: bytes=32 time=1ms TTL=254 Reply from 192.168.62.1: bytes=32 time=3ms TTL=254 Reply from 192.168.62.1: bytes=32 time=6ms TTL=254 I'm at a loss as to what is wrong. I would highly appreciated your assistance. Thank you very much.

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• Run command remotely on Windows computer from C#

  - by Bilal Aslam

  I have a Windows Server 2008 instance on Amazon EC2 (Amazon's cloud compute platform, which provides VMs in the cloud). It has an external IP, and I have an admin account on the box. I would like to 'bootstrap' this instance remotely i.e. I want to run commands to download, install and configure apps on it, all without having to log on even once. Also, I cannot use psexec on the source computer. I have figured out how to do this to a remote, domain-joined computer using WMI. However, I have NOT been able to do for a remote computer on EC2. Here are some specific restrictions: 1) The remote computer is not part of my domain, hence no Kerberos 2) The remote computer does not have a cert I trust, or vice versa I am sure I am running into to some auth/trust restriction. Is there any way I can run a single command on the remote, given that I have admin privileges? I'm not tied down to using WMI, but I do need to run a command somehow. Feels like this should be a solved problem.

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