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• Want to use something like Citrix XenDesktop, Free Alternative?

  - by Chris

  I'm looking to go into IT, general office server management, and it looks like XenDesktop would be a awesome tool to use. If I get it right, you would store a central image of the OS you want to deploy (in an iso file) on the main server. Then use XenDesktop to pull that image down to the client, and it will then boot the OS inside of the virtual machine. Does it download the image of the OS and store it locally (like cloning the VM onto the client?) I'd love to find a free (possibly open source?) alternative to this, I keep on hearing about KVM in Linux and PXE booting a minimalistic OS to use remote KVMs.... Would that be what I'm looking for? Ideally, I'd like a system.. - That allows me to manage one central image for multiple clients (virtualized hardware) - Easily boot a thin client OS that connected to XenDesktop. Would those things be possible with some kind of free alternative? Some guidance would be greatly appreciated.

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• Set proper rights for sshfs mountpoint so it can be shared with samba

  - by CS01

  I have a domain hoster that provides access via SSH. My platforms are: Gentoo 2.6.36-r5 Windows (XP/Vista/7) I work on my Windows, I use Gentoo to do all the magic Windows can't do. Therefore I use sshfs to mount the remote public directory for my domain to /mnt/mydomain.com. Authentication is done via keys, so lazy me don't have to type in my password every now and then. Since I do my coding on Windows, and I don't want to upload/download the changed files all the time, I want to access this /mnt/mydomain.com via a samba share. So I shared /mnt in samba, all mounts except mydomain.com is listed on my Windows Explorer. My theories are: sshfs does not set the mountpoint uid/gid to something that samba expects samba does not know that it has to include the uid/gid that /mnt/mydomain.com has been set. All above is wrong, and I don't know. Here are configs and output from console, need anything else just let me know. Also no errors or warnings that I take notice of being relevant to this issue, but I might be wrong. gentoo ~ # ls -lah /mnt total 20K drwxr-xr-x 9 root root 4.0K Mar 26 16:15 . drwxr-xr-x 18 root root 4.0K Mar 26 2011 .. -rw-r--r-- 1 root root 0 Feb 1 16:12 .keep drwxr-xr-x 1 root root 0 Mar 18 12:09 buffer drwxr-s--x 1 68591 68591 4.0K Feb 16 15:43 mydomain.com drwx------ 2 root root 4.0K Feb 1 16:12 cdrom drwx------ 2 root root 4.0K Feb 1 16:12 floppy drwxr-xr-x 1 root root 0 Sep 1 2009 services drwxr-xr-x 1 root root 0 Feb 10 15:08 www /etc/samba/smb.conf [mnt] comment = Mount points writable = yes writeable = yes browseable = yes browsable = yes path = /mnt /etc/fstab sshfs#[email protected]:/home/to/pub/dir/ /mnt/mydomain.com/ fuse comment=sshfs,noauto,users,exec,uid=0,gid=0,allow_other,reconnect,follow_symlinks,transform_symlinks,idmap=none,SSHOPT=HostBasedAuthentication 0 0 For an easier read: [email protected] /home/to/pub/dir/ /mnt/mydomain.com/ options: comment=sshfs noauto users exec uid=0 gid=0 allow_other reconnect follow_symlinks transform_symlinks idmap=none SSHOPT=HostBasedAuthentication Help!

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• Slow Local Network, Windows 7, Snow Leopard, WiFi/Wired

  - by WerkkreW

  Hello - I am experiencing really poor local network performance in my home. I was recently using a Linksys WRT54G Router with DD-WRT on it, and a couple comparable Linksys-G PCI cards for connectivity but decided to upgrade hoping it would help with my performance issues. The computers in my house are connected as follows: Comcast Business Class Commercial 25mbps/10mbps (Verified with SpeakEasy and Speedtest.net) D-Link DGL-4500 Wireless N Router Windows 7x64 - D-Link DWA-552 Wireless-N Windows 7x64 - D-Link DWA-552 Wireless-N Mac Mini 10.6.2 - AirPort Extreme N Playstation 3, Hard Wired Xbox 360, Hard Wired Essentially the problem is very specific. Web browsing and uploading/downloading files from the internet is fine, more than fine. But if I want to say, Stream a video from one of my Windows 7 computers to my PS3, or copy a large video file between either of the PC's or the Mac, I get a consistent 500-900Kbps throughput at the high end. If I open my network browser, or try to browse my homegroup the response time is horrible. Both of my Windows computers are showing Strong wireless signals with a connection speed of 300Mbps. I know I can never expect to achieve anything near those speeds, but 500Kbps? Here is what I have tried so far: Enabled Single mode N-only and N/G Only on router WPA2 with AES Encrpytion Disabled "Remote Differential Compression" in Windows 7 Disabled TCP "Auto-Tuning" Used other software for file copies such as "Teracopy" I am at the end of my rope. Unfortunately I live in a 75 year old home with plaster walls, so hard-wiring my entire house isn't really an option I can handle right now. Any ideas to help me get decent speed when transferring files across my network would be greatly appreciated.

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• SSH connection problem - allowed from LAN but not WAN

  - by Kerem Ulutas

  I tried to setup my Arch Linux installation to be an SSH host, but here is the thing: I can ssh localhost, it fails to login via public key and asks for username and password, but still able to login. When I try ssh my_wan_ip it gives ssh_exchange_identification: Connection closed by remote host error. I've read all topics about this error and none helped me. By the way, just confirmed, it gives ssh: connect to host my_dyndns_hostname port 22: Connection refused from another machine (outside of my network, it has different wan ip). I have sshd: ALL in "hosts.allow", ALL:ALL in "hosts.deny". I am able to connect to my own pc via ssh, ping my own pc, but my ssh setup seems to be the problem, it gives that annoying error when I try to ssh from wan. /etc/ssh/ssh_config /etc/ssh/sshd_config And finally, here is the debug output for both sshd and ssh: (i ran ssh command and i took output to sshd debug after that): sshd debug ssh debug I can edit my question according to your needs. Just ask for any more information needed. BTW I have no iptables running. I have one cable dsl modem connected to a asus wl-330gE wireless access point, they both have their firewall disabled. I configured NAT so port 22 is directed to the pc I'm having this trouble. Any help appreciated, thanks..

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• Terminal Server 2008 Login: Access Denied

  - by user1236435

  When I try to RDP into a Server 2008 Terminal Server, I get a message that says "Access Denied" and an OK button. I setup the licensing mode correctly (per user) and also have setup to allow all remote connections. I get the following in the security event log: Log Name: Security Source: Microsoft-Windows-Security-Auditing Date: 28/06/2012 12:01:16 Event ID: 4656 Task Category: File System Level: Information Keywords: Audit Failure User: N/A Computer: 0BraApps1.brenntagLA.hou Description: A handle to an object was requested. Subject: Security ID: BRENNTAGLA\jaadmin Account Name: jaadmin Account Domain: BRENNTAGLA Logon ID: 0xbbe3f Object: Object Server: Security Object Type: File Object Name: C:\Windows\System32\ServerManager.msc Handle ID: 0x0 Process Information: Process ID: 0x60c Process Name: C:\Windows\System32\mmc.exe Access Request Information: Transaction ID: {00000000-0000-0000-0000-000000000000} Accesses: READ_CONTROL SYNCHRONIZE WriteData (or AddFile) AppendData (or AddSubdirectory or CreatePipeInstance) WriteEA ReadAttributes WriteAttributes Access Reasons: READ_CONTROL: Granted by D:(A;;0x1200a9;;;BA) SYNCHRONIZE: Granted by D:(A;;0x1200a9;;;BA) WriteData (or AddFile): Not granted AppendData (or AddSubdirectory or CreatePipeInstance): Not granted WriteEA: Not granted ReadAttributes: Granted by ACE on parent folder D:(A;;0x1301bf;;;BA) WriteAttributes: Not granted Access Mask: 0x120196 Privileges Used for Access Check: - Restricted SID Count: 0 Event Xml: 4656 1 0 12800 0 0x8010000000000000 1535565 Security 0BraApps1.brenntagLA.hou S-1-5-21-205301047-3902605089-2438454170-21511219 jaadmin BRENNTAGLA 0xbbe3f Security File C:\Windows\System32\ServerManager.msc 0x0 {00000000-0000-0000-0000-000000000000} %%1538 %%1541 %%4417 %%4418 %%4420 %%4423 %%4424 %%1538: %%1801 D:(A;;0x1200a9;;;BA) %%1541: %%1801 D:(A;;0x1200a9;;;BA) %%4417: %%1805 %%4418: %%1805 %%4420: %%1805 %%4423: %%1811 D:(A;;0x1301bf;;;BA) %%4424: %%1805 0x120196 - 0 0x60c C:\Windows\System32\mmc.exe Any ideas?

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• SMTP message rate control on Ubuntu 8.04, preferably with postfix

  - by TimDaMan

  Maybe I am chasing a bug but I am trying to set up a smtp proxy of sorts. I have a postfix server which receives all the email for a collection of servers/clients. It them uses a smarthost (relayhost=...) to forward it's mail to our corporate MTA. I would like to limit the number of messages an individual server can relay to prevent swamping the corporate MTA. Postfix has a program called "anvil" that is capable of tracking stats about mail to be used for such things but it doesn't seem to be executed. I ran "inotifywait -m /usr/lib/postfix/anvil" while I started postfix and sent a number of messages through it from a remote server. inotifywait indicated anvil was never run. Anyone gotten postfix/anvil rate controls to work? main.cf smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu) biff = no append_dot_mydomain = no readme_directory = no myhostname = site-server-q9 alias_maps = hash:/etc/aliases alias_database = hash:/etc/aliases myorigin = /etc/mailname mydestination = localhost relayhost = Out outgoing mail relay mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 10.0.0.0/8 mailbox_size_limit = 0 recipient_delimiter = + inet_interfaces = 10.X.X.X smtpd_client_message_rate_limit = 1 anvil_rate_time_unit = 1h master.cf extract anvil unix - - - - 1 anvil smtp inet n - - - - smtpd

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• Windows 2008 server smart card security module problem

  - by chris13work

  Hi, I've got a smart card reader and a server application using it as a security module. If I run it under DOS prompt, everything is fine. The server is running and clients can connect to it. I tried to install the server as window service and start it. The server starts but always gives back authentication error because it cannot call the smart card to do encryption. Then I tried to start it with task scheduler and set the trigger factor as "on startup". The server starts also but still cannot access the smart card reader. Then I tried remote desktop to the machine and run the server application under DOS prompt. Same error is returned. The situation is that the smart card reader only works under active console desktop environment. In the server application, WINSCARD API is used to access the smart card reader. Any suggestion so that we can access the smart card reader in running services? OS: Windows Server 2008 Smart Card Driver: Windows USB smart card Reader Smart Card API: WINSCARD

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• Windows 2008 server smart card security module problem

  - by chris13work

  Hi, I've got a smart card reader and a server application using it as a security module. If I run it under DOS prompt, everything is fine. The server is running and clients can connect to it. I tried to install the server as window service and start it. The server starts but always gives back authentication error because it cannot call the smart card to do encryption. Then I tried to start it with task scheduler and set the trigger factor as "on startup". The server starts also but still cannot access the smart card reader. Then I tried remote desktop to the machine and run the server application under DOS prompt. Same error is returned. The situation is that the smart card reader only works under active console desktop environment. In the server application, WINSCARD API is used to access the smart card reader. Any suggestion so that we can access the smart card reader in running services? OS: Windows Server 2008 Smart Card Driver: Windows USB smart card Reader Smart Card API: WINSCARD

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• Solaris 10 invalid ARP requests from 0.0.0.0? Link up/down every hour or 2

  - by JWD

  The guys at the data center where I'm hosting a server running Solaris 10 are telling me that my server is making a lot of invalid arp requests. This is an example of a portion of what was sent to me from the logs (with Mac addresses and IP addresses changed). [mymacaddress]/0.0.0.0/0000.0000.0000/[myipaddress]/[Datestamp]) It's being logged every hour. I don't see anything in the arp tables (arp -a) or routing tables (netstat -r) and I don't see anything relating to 0.0.0.0 when snoping the arp requests. The only place I see any reference to 0.0.0.0 is if I do netstat -a for the SCTP SCTP: Local Address Remote Address Swind Send-Q Rwind Recv-Q StrsI/O State ------------------------------- ------------------------------- ------ ------ ------ ------ ------- ----------- 0.0.0.0 0.0.0.0 0 0 102400 0 32/32 CLOSED But not really sure what that means. Doesn't seem like I can disable SCTP. There are some tunable SCTP parameters but it's not something I'm familiar with. Do I have to add changes to /etc/system? Looks like sctp_heartbeat_interval might be what I need to change? If it makes any difference, I have a few solaris zones running on this server, each with their own IP address on a virtual interface. eth0:0, eth0:1, etc. Does anyone have any idea what might be causing this and how to stop it? I think the switch I'm connected to doesn't like it and momentarily drops the connection. Is there anyway to at least block those requests using ipfilter or something else? Update: This was happening more frequently but now it seems to be happening roughly every hour or every two hours. It's not consistent. I tried setting setting the link speed and duplex to match the switch port and that seemed to make it stop happening for a few hours but then it started again.

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• Win 2003 SBS - secure enough by default?

  - by Pekka

  I have to set up a Windows 2003 Small Business Server to work as a Subversion repository and possibly as an E-Mail server later. The machine is a virtual one, hosted with a hosting company, and freshly initialized. I used the Security Configuration Wizard to deactivate all server roles. After I install Subversion, I will open the necessary ports for the service; in addition, obviously, RDP will stay open so I can remote control the machine. Automatic updates are activated, and I will set up E-Mail notification every time somebody logs on to the server. I'm a programmer and not a professional systems administrator, so I would like to know whether you would regard this a sane and secure setup for a (publicly available) box to host sensitive code and/or E-Mail on. Is there anything in addition I should do to make the machine secure? Is there anything I can do on a long-term basis to keep the machine secure, apart from monitoring the event log (as far as I can make sense out of it), and seeing that any hotfixes are installed properly?

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• Intranet Setup for Small business any resources?

  - by Rogue

  Want to setup an intranet for a small business setup. Current Setup 28 computers running Windows ( few older pc's run Windows Xp but most run Windows 7) Spare Dell Pentium 3 which can run as a server. 6 switches spare NIC's and lots of lan cable available for networking. 3 Independent Internet connections Currently we have 3 independent networks which share internet connections, each network uses a different internet connection. Current network is setup solely to share the internet connection. What I need to achieve in this intranet Setup one common network. Instant file transfer via local network (maybe setup a file server?) Local text and voice messenger software Bridge the 3 internet connections and route all the internet connections from the main server Ability to allow or deny internet access to any computer on the network. Remote access from the main server to the client pc's on the network to debug software issues What operating system should I use on the main server? Do I need a hardware firewall? Any setup guides / resources or how-to's on how I can achieve the above requirements.

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• What is the ideal way to set up multiple FTP enabled web accounts on Fedora?

  - by Nicholas Flynt

  I'm setting up a test server for use as a web development platform, and I'd like to mimic as closely as I can a typical shared hosting setup. That is, I'd like my server to have multple user FTP accounts, each of which links to a directory containing the webroot of the site, and I'd like apache to be able to easily see and manupulate these files. I'll admit: I'm not as familiar with Fedora as I'd like, I run Ubuntu on my home box and SElinux is giving me some grief. My initial plan was to have each user FTP into their home directory, and put the web directory there as well, but SElinux throws a hissy fit when apache tries to access anything outside of its web directory, so that plan was a no go. Would it be wise to continue this route, and perhaps mount web directories in user home folders so that FTP could still be used to access them, even though apache saw them in var/www like it expects? Would it make more sense to set up custom FTP accounts and use a single FTP user on the server box? What's the general course of action on something like this? I'm using vsftpd right now to host web directories, which is why I'm liking the home directory approach (it's simple and secure) but of course there's bound to be a better way to go about it. Thanks. (I'll leave other things, like restricted DB access and such, to another post. I'm interested right now with just getting FTP and apache to play nice in a multi-user environment.) PS: For the record, an issue I ran into when doing all of this was that if apache isn't running as the same user as the FTP account is saving as, there are permissions errors when FTP creates files, requiring the remote user to chmod the files to fix it. A logical fix would be to run apache in a special group, put all web users in this group, and have FTP access default to giving this group read/write access to everything like apache would expect, but I never could figure out how to accomplish this. Bonus points and cake if you know a solution.

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• Dynamic DNS Updates with Wireless and Wired interfaces

  - by Phaedrus

  We have offices full of Windows & Mac users who obtain IP addresses from a Windows DHCP server, which in turn updates Dynamic DNS entries. We are noticing major inconsistencies with the entries, and have found that the problem is occurring more on Macs than on windows, and even more when users are frequently switching from wired to wireless adapter, which makes sense, as this sequence occurs: User enables wired adapter and registers Proper DNS User enables wireless adapter and registers 2nd proper DNS entry user switches off wireless manually and 2nd entry remains improperly until scavenge. Our help desk folks rely heavily (maybe more than they should) on the dynamic entries as part of their business process. For example, the user submits a help desk ticket, and the staff member expects to be able to remote desktop to their machine by hostname, which is hyperlinked in the helpdesk ticketing app. We have implemented multiple solutions & band-aids to different symptoms of the problems such as: Using DNS Reservations for Macintosh PCs Using DNS Scavenging to remove old records Switching from a Cisco DHCP server to the Windows DHCP Server But no matter what we do, it seems impossible to maintain perfect records. Has anyone encountered this problem before? What is industry best practice? Comments & Suggestions are much appreciated, /P

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• OpenSWAN KLIPS not working

  - by bonzi

  I am trying to setup IPSec between 2 VM launched by OpenNebula. I'm using OpenSWAN for that. This is the ipsec.conf file config setup oe=off interfaces=%defaultroute protostack=klips conn host-to-host left=10.141.0.135 # Local IP address connaddrfamily=ipv4 leftrsasigkey=key right=10.141.0.132 # Remote IP address rightrsasigkey=key ike=aes128 # IKE algorithms (AES cipher) esp=aes128 # ESP algorithns (AES cipher) auto=add pfs=yes forceencaps=yes type=tunnel I'm able to establish the connection with netkey but klips doesnt work. ipsec barf shows #71: ERROR: asynchronous network error report on eth0 (sport=500) for message to 10.141.0.132 port 500, complainant 10.141.0.135: No route to host [errno 113, origin ICMP type 3 code 1 (not authenticated)] Tcpdump shows 22:50:20.592685 IP 10.141.0.132.isakmp > 10.141.0.135.isakmp: isakmp: phase 1 I ident 22:50:25.602182 ARP, Request who-has 10.141.0.135 tell 10.141.0.132, length 46 22:50:26.602082 ARP, Request who-has 10.141.0.135 tell 10.141.0.132, length 46 22:50:27.601985 ARP, Request who-has 10.141.0.135 tell 10.141.0.132, length 46 ipsec eroute shows 0 10.141.0.135/32 -> 10.141.0.132/32 => %trap What could be the problem?

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• Hosting a server for websites, ftp and random use at home?

  - by Zolomon

  I'm wondering what's the best option for me if I want to move all my hosted websites (from a hosting company) to a server at my own home? Basically, the needs I have are: be able to host websites using PHP/ASP.NET (haven't really decided yet - both would be preferred!) enable FTP so I can create accounts for my family members to access the server for file handling SSH SSL - for secure connections (this is something you have to buy/apply for per domain, not sure if there are any server side settings that have to be made) be able to stream video remote desktop host home-brew applications that can run as services use either MySQl/SQLite/SQL for relational database storage What should I think of before I buy a server? What hardware will I need, what will limit my server? I basically want to learn networking better as I'm a software and web developer but haven't had the resources to acquire any serious toys until now. At the time of writing, most of my websites have 60 visits/day so I don't suspect them to be very demanding. Is there something I haven't thought of that I should have? What OS would you suggest I run? FreeBSD vs Windows Server vs ?

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• Setting up MySQL Linux slave with a Windows master

  - by philwilks

  I'm running a MySQL 5.0 database server on Windows Server 2008. The total size of the database is about 1Gb. I make daily backups, but I'd like to step up to having a slave server for extra protection. My thinking was that I wouldn't need the expense of a Windows machine to do this, and a Linux "cloud server" from RackSpace would do the job well for quite a low cost. However I have little experience with Linux, so I have a few questions... Does this sound like a good idea? Is there anything wrong with linking Windows and Linux MySQL servers? Does Linux have the equivalent of Remote Desktop Connection? If so can I use this from a Windows machine? Would a particular Linux distro be well suited to this task? RackSpace offer ArchLinux, CentOS, Debian, Fedora and Ubuntu. My immediate thinking is to go with Ubuntu as I've heard it's more friendly for people coming from a Windows background. Any comments you have would be very appreciated! Phil

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• Apache Server Redirect Subdomain to Port

  - by Matt Clark

  I am trying to setup my server with a Minecraft server on a non-standard port with a subdomain redirect, which when navigated to by minecraft will go to its correct port, or if navigated to by a web browser will show a web-page. i.e.: **Minecraft** minecraft.example.com:25565 -> example.com:25465 **Web Browser** minecraft.example.com:80 -> Displays HTML Page I am attempting to do this by using the following VirtualHosts in Apache: Listen 25565 <VirtualHost *:80> ServerAdmin [email protected] ServerName minecraft.example.com DocumentRoot /var/www/example.com/minecraft <Directory /> Options FollowSymLinks AllowOverride None </Directory> <Directory /var/www/example.com/minecraft/> Options Indexes FollowSymLinks MultiViews AllowOverride None Order allow,deny allow from all </Directory> </VirtualHost> <VirtualHost *:25565> ServerAdmin [email protected] ServerName minecraft.example.com ProxyPass / http://localhost:25465 retry=1 acquire=3000 timeout=6$ ProxyPassReverse / http://localhost:25465 </VirtualHost> Running this configuration when I browse to minecraft.example.com I am able to see the files in the /var/www/example.com/minecraft/ folder, however if I try and connect in minecraft I get an exception, and in the browser I get a page with the following information: minecraft.example.com:25565 -> Proxy Error The proxy server received an invalid response from an upstream server. The proxy server could not handle the request GET /. Reason: Error reading from remote server Could anybody share some insight on what I may be doing wrong and what the best possible solution would be to fix this? Thanks.

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• switchover in postgresql

  - by user1010280

  I am using Postgresql 9.0 with Streaming replication. So, during switchover I follow these steps:- Get the server timestamp on primary. Get the current log position on primary. Set Verify Log location Verify Transaction Received Location Shutdown DB on production. Synchronize the transaction logs from PR to DR. Trigger a failover on the DR Database by creating the trigger file specified in recovery.conf Verify DB Mode on DR Copy the control file from from DR to primary. copy the temporary stats file from DR to primary. copy the history file from DR to primary. Create recovery.conf file. Start Database in standby mode in primary. Verify DB mode on PR At step (6), I have to copy last wal generated on Primary to standby and sync both PR and standby. but this thing takes time to copy files because this remote. So that postgres will keep seraching for wal for long time and after that it stops the server. So I want to know is there any way so that I can ask postgres to stop seraching or locating WAL after shutdown??? because postgres tries to locate this wal every 5 seconds. Please reply as soon as possible..its urgent...

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• Transparent proxying leaves sockets with SYN_RCVD in MacOS X 10.6 Snow Leopard (and maybe FreeBSD)

  - by apenwarr

  I'm trying to create a transparent proxy on my MacOS machine in order to port the sshuttle ssh-based transproxy VPN from Linux. I think I almost have it working, but sadly, almost is not 100%. Short version is this. In one window, start something that listens on port 12300: $ while :; do nc -l 12300; done Now enable proxying: # sysctl -w net.inet.ip.forwarding=1 # sysctl -w net.inet.ip.fw.enable=1 # ipfw add 1000 fwd 127.0.0.1,12300 log tcp from any to any And now test it out: $ telnet localhost 9999 # any port number will do # this works; type stuff and you'll see it in the nc window $ telnet google.com 80 # any host/port will do # this *doesn't* work! After the latter experiment, I see lines like this in netstat: $ netstat -tn | grep ^tcp4 tcp4 0 0 66.249.91.104.80 192.168.1.130.61072 SYN_RCVD tcp4 0 0 192.168.1.130.61072 66.249.91.104.80 SYN_SENT The second socket belongs to my telnet program; the first is more suspicious. SYN_RCVD implies that my SYN packet was correctly captured by the firewall and taken in by the kernel, but apparently the SYNACK was never sent back to telnet, because it's still in SYN_SENT. On the other hand, if I kill the nc server, I get this: $ telnet google.com 80 Trying 66.249.81.104... telnet: connect to address 66.249.81.104: Connection refused telnet: Unable to connect to remote host ...which is as expected: my proxy server isn't running, so ipfw redirects my connection to port 12300, which has nobody listening on it, ie. connection refused. My uname says this: $ uname -a Darwin mean.local 10.2.0 Darwin Kernel Version 10.2.0: Tue Nov 3 10:37:10 PST 2009; root:xnu-1486.2.11~1/RELEASE_I386 i386 Does anybody see any different results? (I'm especially interested in Snow Leopard vs Leopard results, as there seem to be some internet rumours that transproxy is broken in Snow Leopard version) Any advice for how to fix?

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• About to go live: virtual dedicated server or cloud?

  - by morpheous

  I am about to launch my startup company, and we will be going live in a few weeks time. We have really tight budgetary constraints, since we are bootstrapping - and would prefer not to raise external capital. I cant use shared hosting because I need more control of the server machine (for technical reasons - e.g. using proprietary extensions to PHP, Apache and in the database layer as well) - but want to control costs and dont want to go fully private server route, until we have determined the market size etc. So the only real alternatives AFAIK is between virtual server and the cloud. At the moment, cloud services seem a bit "vague" to me. My understanding is that they allow an entity to outsource its IT infrastructure, which in my mind (at least), is indistinguishable from what a hosting provider provides (at least from a functional point of view) - I would like to seek some clarification on exactly what the difference between the two is. Back to my original question, my requirements are: IT infrastructure that can scale with growth Ability to have control of the machine (for e.g. to install our internally developed libraries etc) Backup software that is flexible and comprehensive enough (yet simple to use), that allows a (secured) backup strategy to be implemented. On this issue, I have always wondered where the actual backed up data was stored (since the physical machines are remote, and one cant get access to any actual tapes etc backed onto). I would also like some advice and recommendations in this area. Regarding data size, I am expecting the dataset to be increasing by a few megabytes of data (originally, say 10Mb, in about a years time, possibly 50Mb) every day. As an aside, I have decided to deploy on a Debian server (most of my additional libraries etc were compiled and built on a Debian machine). Mindful of all of the above, I would like some advice (and reason) as to which route to take. I would also like some advice on which backup software to use, from people who have walked a similar path.

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• outlook security alert after adding a second wireless access point to the network

  - by Mark

  Just added a Netgear WG103 Wireless Access Point in our conference room to allow visitors to access the internet through out internal network. When switched on visitors can connect to the intenet and everything works fine. Except, when the Access Point is switched on, normal users of the network get a Security Alert when they try to start Outlook 2007. The Security Alert is the same as the one shown in question 148526 asked by desiny back in June 2010 (http://serverfault.com/questions/148526/outlook-security-alert-following-exchange-2007-upgrade-to-sp2) rather than "autodiscover.ad.unc.edu" my security alert references our "Remote.server.org.uk". If I view the certificate it relates to "Netgear HTTPS:....", but the only Netgear equipment we have is the new Access Point installed in the conference room. If the Access Point is not switched on we do not get the Security Alert. At first I thought it was because we had selected "WPA-PSK & WPA2-PSK" Network Authentication Type but it continues to occur even if we opt for "Shared Key" WEP Data Encryption. I do not understand why adding a Netgear Wireless Access point would cause Outlook to issue a Security Alert when users try to read their email. Does anyone know what I have to do to get rid of the Security Alert? Thanks in advance for reading this and helping me out.

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• How do I collect SNMP readings from intermittently-connected sites?

  - by Luke404

  I am collecting SNMP data on-site for a number of systems, currently using Cacti. These systems are spread on a number of sites that aren't always connected to internet, but I also need to centralize the data on a single system (datacenter housed server) and get graphs out of it. If I directly poll remote systems with a centralized Cacti I'd loose data when a site is not connected to internet. I should record data on-site (I have a server at each site and I can run whatever I want on it) and then 'sync' everything to the central system. One hack could be a cacti or directly an rrdtool on site and then periodically rsync RRD data to the central Cacti system, but that doesn't sound like a 'clean' solution: every RRD would have to be defined at both places and rsync scripts setup with the specific file names. Can you suggest a better solution? Cacti is not a requirement but I'd like to use something like that on the central system. On-site systems need only to collect data I don't need to graph it there or manage users rights to view data and stuff like that, users will only access the centralized system.

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• IPSec tunnelling with ISA Server 2000...

  - by Izhido

  Believe it or not, our corporate network still uses ISA Server 2000 (in a Windows Server 2003 machine) to enable / control Internet access to / from it. I was asked recently to configure that ISA Server to create a site-to-site VPN for a new branch in a office about 25 km. away from it. The idea is basically to enable not only computers, but also Palm devices (WiFi-enabled, of course), to be able to see other computers in both sites. I was also told that a simple VPN-enabled wireless AP/router (in this case, a Cisco WRV210 unit) should be enough to establish communications with the main office. To be fair, the router looks easy to configure; it was confusing at first, but further understanding of how site-to-site VPNs work cleared all doubts about it. Now I need to make modifications to our ISA Server in order to recognize the newly installed & configured "remote" VPN site. Thing is, either my Googling skills are pathethically horrible, or there doesn't seem to be much (or any, at all) information about how to configure an ISA Server 2000 for this purpose. Lots of stuff on 2004, of course; also, I think I saw something for 2006. But nothing I could find about 2000. Reading about 2004, it seems that the only way I can do site-on-site with a Cisco router (read: a non-ISA-Server machine) is through something they call a "IPSec tunnel". Fair enough. However, I can't figure for the life of me how could I even start to find, leave alone configure, such a thing. Do you, people, happen to know how to do IPSec tunelling on a ISA Server 2000, so I can connect to a Cisco WRV210 VPN-enabled router, and build a site-to-site VPN for both networks? Or is this not possible at all? (Meaning I should change anything in this configuration to make it work...)

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• Route specific network traffic through vpn in virtualbox guest

  - by Sander

  I am running OSX with a windows server 2008 guest in Virtualbox. My goal is to route some of the network traffic in the host through the server guest. This is because the win2008 server has a VPN connection to my workplace using a Smartcard solution which can not operate on OSX. My current set-up is like this: OSX (Host): connected to the internet via en01 Win2008 (Guest): connected to the internet using NAT (lan1 in guest) has a SSTP VPN connection to my workplace is connected to the guest using an Host Only Adapter vboxnet0 (LAN2 in guest) The important part is about the host (OSX). Primarily I want all network traffic to just go through en01. However, all traffic which can only be accessed through the VPN must go through the guest and through the VPN. I have one specific FQDN which can only be accessed through the VPN (say corp.mycompany.com). I do not know much about networking. I thought I would be able to get it to work by bridging together LAN2 and LAN1 but this didn't seem to work this: http://archives.aidanfindlater.com/blog/2010/02/03/use-vpn-for-specific-sites-on-mac-os-x/ using a loopback adapter on WinXP (when I did not have win2008 yet, but this doesn't work because I can't create a PPTP connection) And I've also read about Routing and Remote Access but I have no idea on how to use this. Can someone help me in the right direction?

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• How do I clear out the ssh-agent entries (on Mac OS X )?

  - by cwd

  I'm running Mac OS X, and it appears that after SSHing to several machines, using identity files, my 'ssh-agent' builds up a lot of identity / keys and then sometimes offers too many to a remote machine, causing them to kick me off before connecting: Received disconnect from 10.12.10.16: 2: Too many authentication failures for cwd It's pretty obvious what's happening, and this page talks about it in more detail: SSH servers only allow you to attempt to authenticate a certain number of times. Each failed password attempt, each failed pubkey/identity that is offered, etc, take up one of these attempts. If you have a lot of SSH keys in your agent, you may find that an SSH server may kick you out before allowing you to attempt password authentication at all. If this is the case, there are a few different workarounds. Rebooting clears the agent and then everything works OK again. I can also add this line to my .ssh/config file to force it to use password authentication: PreferredAuthentications keyboard-interactive,password Anyhow, I saw the note on the page I referenced talking about deleting keys from the agent, but I'm not sure if that applies on a Mac since they appear to be cleared after reboot anyhow. Is there a simple way to clear out all keys in the 'ssh-agent' (the same thing that happens at reboot)?

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