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• Using a GoDaddy SSL certificate with Virtualmin (Webmin)

  - by Kevin

  A client of mine decided to go ahead and move from a self-signed certificate to a commercial one ("GoDaddy Standard SSL"). The first service I wanted to move to the commercial SSL cert was Webmin/Usermin... However, upon migrating to the new SSL cert and restarting Webmin, I got the following error: [21/Oct/2012:13:12:47 -0400] Restarting Failed to open SSL cert /etc/webmin/miniserv.cert at /usr/share/webmin/miniserv.pl line 4229. Error: Webmin server did not write new PID file And that's all it says. Here's Webmin's config file (/etc/webmin/miniserv.conf): port=10000 root=/usr/share/webmin mimetypes=/usr/share/webmin/mime.types addtype_cgi=internal/cgi realm=Webmin Server logfile=/var/webmin/miniserv.log errorlog=/var/webmin/miniserv.error pidfile=/var/webmin/miniserv.pid logtime=168 ppath= ssl=0 env_WEBMIN_CONFIG=/etc/webmin env_WEBMIN_VAR=/var/webmin atboot=1 logout=/etc/webmin/logout-flag listen=10000 denyfile=\.pl$ log=1 blockhost_failures=5 blockhost_time=60 syslog=1 session=1 server=MiniServ/1.600 userfile=/etc/webmin/miniserv.users keyfile=/etc/webmin/miniserv.pem passwd_file=/etc/shadow passwd_uindex=0 passwd_pindex=1 passwd_cindex=2 passwd_mindex=4 passwd_mode=0 preroot=virtual-server-theme passdelay=1 sudo=1 sessiononly=/virtual-server/remote.cgi preload=virtual-server=virtual-server/virtual-server-lib-funcs.pl virtual-server=virtual-server/feature-unix.pl virtual-server=virtual-server/feature-dir.pl virtual-server=virtual-server/feature-dns.pl virtual-server=virtual-server/feature-mail.pl virtual-server=virtual-server/feature-web.pl virtual-server=virtual-server/feature-webalizer.pl virtual-server=virtual-server/feature-ssl.pl virtual-server=virtual-server/feature-logrotate.pl virtual-server=virtual-server/feature-mysql.pl virtual-server=virtual-server/feature-postgres.pl virtual-server=virtual-server/feature-ftp.pl virtual-server=virtual-server/feature-spam.pl virtual-server=virtual-server/feature-virus.pl virtual-server=virtual-server/feature-webmin.pl virtual-server=virtual-server/feature-virt.pl virtual-server=virtual-server/feature-virt6.pl anonymous=/virtualmin-mailman/unauthenticated=anonymous premodules=WebminCore logouttimes= extracas=/etc/webmin/miniserv.chain certfile=/etc/webmin/miniserv.cert ssl_redirect=0 Here is a screen shot of the Webmin SSL config screen as well, for what it's worth: http://postimage.org/image/r472go7tf/ Edited Mon Oct 22 10:45:24 CDT 2012: When running the command openssl x509 -noout -text -in /etc/webmin/miniserv.cert as Falcon Momot suggested, I get the following error: unable to load certificate 139760808240800:error:0906D06C:PEM routines:PEM_read_bio:no start line:pem_lib.c:696:Expecting: TRUSTED CERTIFICATE

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• Vista Power Management GPO

  - by Matt

  Hi, I've created a loopback GPO that has several settings (both computer and user) including a Custom User Interface (Access 2007 Application) and Power Management (has the computer sleep after being idle for 2 min). I'm also filtering so that this policy does not apply to "Admins" - only to "Users". The problem I'm having is when the "Users" login the Power Management settings don’t work, but they do for "Admins". For testing I'm allowing the "Users" to launch Task Manager and use the Run line, so I'll run Explorer and look at Power Management and it shows the settings from my GPO. So I created a test OU with copies of the aforementioned GPO, but removed the Custom User Interface and found the Power Management settings do work for both the "Users" and "Admins". When I add the Custom UI the Power Management settings break for the "User" but continue to work for "Admins". Do the Power Management options need to have User Interface be "Explorer.exe"? Is this a bug or am I doing this the wrong way? BTW the tablets are using Vista SP2. Any insight or advice would be greatly appreciated. Thanks, Matt

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• What kind of “sysadmin stuff” should I show to students during a talk?

  - by Gregory Eric Sanderaon

  A teacher asked me If I could talk about my job as a linux sysadmin in his class. The course is called "Introduction to Operating systems" and i've been given 45 minutes to talk. The students are beginning their second year, so they've had a bit of experience with programming in different languages. What i'm like to do is show a series of hands-on examples of the kinds of things I do on a regular basis. I've already got a few ideas jotted down, but I'm afraid that they might be either too advanced or too simple for the students to appreciate. Another concern is that a topic might be too long to explain and use too much time overall. Here are a few ideas : Program deployment using version control (git in my case) filtering apache logs using grep, awk, uniq, tail A couple of bash scripts that i've made for various stuff on servers live montitoring (htop, iotop, iptraf) creating databases and assigning roles in mysql/postgresql So, are these ideas any good ? Do you have better ideas ? are the ideas too simple and should I go for more "advanced" stuff ?

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• DKIM- Filter No Signature Data

  - by Vineet Sharma

  I have installed DKIM-Filter on Postfix after reading this tutorial http://www.unibia.com/unibianet/systems-networking/how-setup-domainkeys-identified-mail-dkim-postfix-and-ubuntu-server My email now has a DKIM signature but still it is landing in the SPAM folder. Here is the header Received-SPF: neutral (google.com: 69.164.193.167 is neither permitted nor denied by best guess record for domain of [email protected]) client-ip=69.164.193.167; Authentication-Results: mx.google.com; spf=neutral (google.com: 69.164.193.167 is neither permitted nor denied by best guess record for domain of [email protected]) [email protected]; dkim=hardfail (test mode) [email protected] Received: from promote.a2labs.in (localhost [127.0.0.1]) by promote.a2labs.in (Postfix) with ESMTPA id 34858530E8 for <[email protected]>; Mon, 28 Feb 2011 12:23:07 +0530 (IST) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=a2labs.in; s=mail; t=1298875987; bh=bo+H1VYPIHMja2u7i1lnzr4k/j4Pe8iSf79bVw94XpI=; h=To:Subject:Message-ID:Date:From:Reply-To:MIME-Version: Content-Type:Content-Transfer-Encoding; b=nhTdlnUwo0iUJ92ycQzKSRjw 5Pfya0DJcJrAc8Mr2hIv8OLpgzBCzdOMWTGqR5nuUmAzgCGYBhYAM2XZwVxo9JG/iz7 oYKysmNQnskFx0TRyW3UOkDWcfHcPnCL6Y7fGzZWinmsyjsg47k+mKZg/e8jqlwTAMO PYKkt5pBz7SM0= Also my mail.err file shows Feb 28 12:17:03 ivineet dkim-filter[32181]: 1F788530E1: no signature data Feb 28 12:18:02 ivineet dkim-filter[32181]: 432BA530E2: no signature data How to fix it

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

  - by Rax Olgud

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

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• Google Apps for Domains, Multiple Domains

  - by belliez

  I have a primary google apps for domains account which I use for my personal email, calender, docs etc and is great. I also receive my pop3 company email via settings-Get mail from other accounts in my account. Due to spam I want to make use of gmail servers for my company email and have two options: [1] Add my second domain as a domain alias [2] Create a new apps for domains account If I do [1] above do I access (send and receive) my company email as if it was a separate account or is it merged into my primary domain. I want the two seperated. If I perform [2] can I share my contacts / calender between the two? I also have Act! contact manager which syncs to my primary domain and it is getting messy now with personal and work contacts being changed / sync'd to my Act CM software. I want to try and separate my personal and work contacts (but make the work them avaiable in my primary domain). Hope this makes sense! Your suggestions are gratefully accepted. Thank you

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• Webmin / Virtualmin running php as www-data, is locked out of viewing .htaccess and writing

  - by Kirill

  I've asked this on the virtualmin forums, but haven't had any help from there. Recently, "something" happened and it seems that the apache service has gone a bit weird. What it does: it runs all apache traffic as www-data and sometimes spawns the php5-cgi process as www-data, this is a problem because all the domain users own their directories and default permissions don't let www-data write to these folders (file uploads are dead) or read .htaccess (permalinks are broken in wordpress). I've googled this for about a week straight now, tried pretty much everything I could find and achieved nothing. The only thing that I think might actually be the cause of all this is this page: http:// - i.imgur.com/NYW3x.png (got shut down by the spam filter) So I figured if I set it to "default", this might magically start working again, but all it does is "crash" apache (all websites timeout). I figure it's something to do with the "mpm" module or something, but I can't find anything relevant in the settings to modify for it to work. Can someone please point me in the right direction? System info: Webmin version 1.580 Kernel and CPU Linux 2.6.35.4-rscloud on x86_64 Virtualmin version 3.90.gpl GPL Ubuntu 10.04 LTS (Lucid) A couple screenshots of top http://i.imgur.com/U2DTK.png http://i.imgur.com/sNPKs.png

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• Reverse proxy for mailserver (SMTP + HTTP for web client)

  - by gaqzi

  I'm looking at doing some reverse proxy work for a mail server with corresponding web client. Both servers are running on the same machine, this is not a server with a high load. :) The solution I've discussed with friends is having the mail server/web client on our internal network. Then to put a reverse proxy on the DMZ to service both SMTP and web client HTTP-traffic to the mail server on the internal network. From what I understand this is the recommended secure solution? So far I've thought for the SMTP-proxy part of using postfix which will receive mail, do some spamhause and similar anti-spam measures and if it all checks out, send the mail to the mail server on the inside. The mail server on the inside will send all outgoing mail to the proxy which will then send it out on the Internet. For the web client I'm not sure exactly which software I should be running on the proxy machine, I've been thinking about using Squid -- but that's basically based on the fact that I know squid is a http proxy. The web client data will be sent out over SSL. Reading around some here on Serverfault I've seen other people using Apache with mod_proxy+mod_security for similar situations. Am I thinking correctly for this solution? What software would you guys use and with which modules? Thanks in advance for the help! :)

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• SPF hardfail and DKIM failure when recipient has e-mail forwarding

  - by Beaming Mel-Bin

  I configured hardfail SPF for my domain and DKIM message signing on my SMTP server. Since this is the only SMTP server that should be used for outgoing mail from my domain, I didn't foresee any complications. However, consider the following situation: I sent an e-mail message via my SMTP server to my colleague's university e-mail. The problem is that my colleague forwards his university e-mail to his GMail account. These are the headers of the message after it reaches his GMail mailbox: Received-SPF: fail (google.com: domain of [email protected] does not designate 192.168.128.100 as permitted sender) client-ip=192.168.128.100; Authentication-Results: mx.google.com; spf=hardfail (google.com: domain of [email protected] does not designate 192.168.128.100 as permitted sender) [email protected]; dkim=hardfail (test mode) [email protected] (Headers have been sanitized to protect the domains and IP addresses of the non-Google parties) GMail checks the last SMTP server in the delivery chain against my SPF and DKIM records (rightfully so). Since the last STMP server in the delivery chain was the university's server and not my server, the check results in an SPF hardfail and DKIM failure. Fortunately, GMail did not mark the message as spam but I'm concerned that this might cause a problem in the future. Is my implementation of SPF hardfail perhaps too strict? Any other recommendations or potential issues that I should be aware of? Or maybe there is a more ideal configuration for the university's e-mail forwarding procedure? I know that the forwarding server could possibly change the envelope sender but I see that getting messy.

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• Exim log and send all mail for a given domain through another server

  - by Josh

  I administer a handful of shared web hosting servers. Recently, Yahoo has been deprioritizing/greylising all email sent from these servers. I am getting the dereaded 421 4.7.0 [TS02] Messages from my.ip.address temporarily deferred message from Yahoo and their postmaster has been unresponsive. I am unable to find any way to set up a feedback loop like AOL has for my IP address -- I did find a way to set up a feedback loop for a given domain, but we host hundreds of domains, and don't have the time to set up that many feedback loops. So what I'd like to do is twofold: Configure Exim to send all email destined to an @yahoo.com address to a relay, a new server which has an IP that yahoo is not blocking. Configure Exim (or maybe the relay) to log all emails sent to @yahoo.com, so I can review them and, in case one of my uses is violating ToS and sending SPAM to yahoo users, take the appropriate action. How could I accomplish these? Or, does anyone have any other advice for how to get mail to flow through Yahoo and ensure that any email generating complaints is brought to my attention? (For what it's worth, these servers are not listed on any major blacklists)

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• Zimbra MTA settings

  - by user192702

  Hi have some questions for Zimbra v8.0.6GA. Under Configure - MTA - Network, I'm seeing a few settings and am not very clear what to do with them. Web mail MTA Host name Is this for delivering local mail only (ie not for external mails)? According to this link, it says the following. That's a mouthful but what is "composed messages"? Is this for a multi server deployment where the Postfix server for Zimbra isn't installed on the same box that as the rest of the servers? Webmail MTA is used by the Zimbra server for composed messages and must be the location of the Postfix server in the Zimbra MTA. Relay MTA for external delivery My understanding after reading the doc is that if my ISP doesn't force me to relay outgoing mails through them, and I have enabled DNS lookup, I can leave this blank? Inbound SMTP host name Sorry I know this is explained as "If your MX records point to a spam-relay or any other external non-Zimbra server, enter the name of that server in the Inbound SMTP host name field." but I'm not following. Can someone provide an example? MTA Trusted Networks The admin doc says "To set up MTA trusted networks on a per server basis, make sure that MTA trusted networks have been set up as global settings and then go the Configure Servers MTA page and in the MTA Trusted Networks field enter the trusted network addresses for the server." However I see out of the box it has default networks setup for the server whereas on a global level it's blank. Does this mean there is a bug with the install software and I have to copy the setting from the server to the global setting?

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• Error 720 on VPN (PPTP) attempt

  - by Andy Shulman

  When I attempt to connect to a server running XP x64 (so essentially Server 2003) using a PPTP connection, it fails with client-side error Registering your computer on the network... Error 720: A connection to the remote computer could not be established. You might need to change the network settings for this configuration. and server-side error Event ID: 20050 The user WINSERV3\Andy connected to port VPN8-1 has been disconnected because no network protocols were successfully negotiated. I have configured the router to pass both TCP packets on 1723 and GRE packets. I have used Wireshark (filtering out ARP, UDP, and all TCP ports other than 1723) to observe the packets received by the server. Wireshark does not explicitly name any protocol GRE, but it does tell me the server sent and received TCP, PPTP, PPP LCP, PPP CHAP, PPP CBCP, and PPP IPCP. The connection seems to go wrong at packet 30, where the protocol is PPP LCP, with the payload of the packet being labeled "Protocol Reject". Obviously, this is going from server to client. This would seem to lead to the conclusion that there is something wrong with my client, which runs Windows 7 Ultimate x64. However, it is able to connect to my house's router, which runs the DD-WRT firmware and is thus a PPTP endpoint. I'm thoroughly at a loss. Please help!

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• IIS URL Rewrite HTTP to HTTPS with Port

  - by Andy Arismendi

  My website has two bindings: 1000 and 1443 (port 80/443 are in use by another website on the same IIS instance). Port 1000 is HTTP, port 1443 is HTTPS. What I want to do is redirect any incoming request using "htt p://server:1000" to "htt ps://server:1443". I'm playing around with IIS 7 rewrite module 2.0 but I'm banging my head against the wall. Any insight is appreciated! BTW the rewrite configuration below works great with a site that has an HTTP binding on port 80 and HTTPS binding on port 443, but it doesn't work with my ports. P.S. My URLs intentionally have spaces because the 'spam prevention mechanism' kicked in. For some reason google login doesn't work anymore so I had to create an OpenID account (No Script could be the culprit). I'm not sure how to get XML to display nicely so I added spaces after the opening brackets. < ?xml version="1.0" encoding="utf-8"? < configuration < system.webServer < rewrite < rules < rule name="HTTP to HTTPS redirect" stopProcessing="true" < match url="(.*)" / < conditions trackAllCaptures="true" < add input="{HTTPS}" pattern="off" / < /conditions < action type="Redirect" redirectType="Found" url="htt ps: // {HTTP_HOST}/{R:1}" / < /rule < /rules < /rewrite < /system.webServer < /configuration

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• SpamAssassin 2010 Bug still active on my mailserver despite the offending rule being fixed - where t

  - by Ibrahim

  The SpamAssassin 2010 bug was supposed to be fixed not long after the bug became widely known, and indeed the offending rule in my /usr/share/spamassassin/72_active.cf has been updated. However, incoming messages are still being tagged by this eg: X-Spam-Status: No, score=3.188 tagged_above=-999 required=6.31 tests=[BAYES_50=0.001, FH_DATE_PAST_20XX=3.188, SPF_PASS=-0.001] Here is the relevant rule: ##{ FH_DATE_PAST_20XX header FH_DATE_PAST_20XX Date =~ /20[2-9][0-9]/ [if-unset: 2006] describe FH_DATE_PAST_20XX The date is grossly in the future. ##} FH_DATE_PAST_20XX I'm on spamassassin/3.2.5-2+lenny1.1~volatile1 on Debian Lenny, completely up to date. Any pointers on where to look to figure out what's going on? I don't know anything about SpamAssassin; someone else usually manages this but I'm free right now and am trying to figure out what the problem is because it's been annoying us for a while and we only just realized this bug was still affecting us. Update: I've lowered the score for the FH_DATE_PAST20XX rule to 0.1, both in /etc/spamassassin/local.cf and /usr/share/spamassassin/50_scores.cf and it's still giving 3.188 points for this rule. Any idea what's going on? This really has me stumped. Update 2: It seems that after restarting amavisd, it's been fixed. What's the difference between amavisd and spamd? It seems like both should not be running, or something.

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• SpamAssassin 2010 Bug still active on my mailserver despite the offending rule being fixed - where t

  - by Ibrahim

  The SpamAssassin 2010 bug was supposed to be fixed not long after the bug became widely known, and indeed the offending rule in my /usr/share/spamassassin/72_active.cf has been updated. However, incoming messages are still being tagged by this eg: X-Spam-Status: No, score=3.188 tagged_above=-999 required=6.31 tests=[BAYES_50=0.001, FH_DATE_PAST_20XX=3.188, SPF_PASS=-0.001] Here is the relevant rule: ##{ FH_DATE_PAST_20XX header FH_DATE_PAST_20XX Date =~ /20[2-9][0-9]/ [if-unset: 2006] describe FH_DATE_PAST_20XX The date is grossly in the future. ##} FH_DATE_PAST_20XX I'm on spamassassin/3.2.5-2+lenny1.1~volatile1 on Debian Lenny, completely up to date. Any pointers on where to look to figure out what's going on? I don't know anything about SpamAssassin; someone else usually manages this but I'm free right now and am trying to figure out what the problem is because it's been annoying us for a while and we only just realized this bug was still affecting us. Update: I've lowered the score for the FH_DATE_PAST20XX rule to 0.1, both in /etc/spamassassin/local.cf and /usr/share/spamassassin/50_scores.cf and it's still giving 3.188 points for this rule. Any idea what's going on? This really has me stumped. Update 2: It seems that after restarting amavisd, it's been fixed. What's the difference between amavisd and spamd? It seems like both should not be running, or something.

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• Outbound HTTP performance tuning recommendations

  - by Richard Gadsden

  I'll detail my exact setup below, but general recommendations for a better web-browsing experience will be useful. A nice checklist of things to try would be great! I have 600 users on a single site with an 8MB leased line. I get a lot of moans about the performance of "the internet" (ie web-browsing). What recommendations do the community have for speeding things up without just throwing more bandwidth at it? I expect I will end up buying some more, but good management tips are always valuable. My setup is this: Cisco PIX (515E) firewall on the edge of the network. It's just doing some basic NAT, and opening up a handful of ports to various bastion hosts (aka DMZ servers). The DMZ is just a switch that the servers are plugged into. ISA 2006 Enterprise array (two servers) connecting DMZ to the internal LAN, with WebSense Web Security filtering HTTP traffic so users can't look at porn or waste bandwidth on YouTube during working hours. I've done a few things - I've just switched my internal DNS over to use root hints, which halved DNS query latency from 500ms to 250ms. Well worth doing. I'm trying to cache more aggressively, but so much more of the internet is AJAXy and doesn't cache very well as compared to five years ago. Plus the 70GB of cache which felt like a lot a few years ago really isn't any more. I'm getting about 45% cache hits by number of requests, but only about 22% by size, ie larger objects are less likely to be cached. Latency seems to be part of the problem. Is that attributable to the bandwidth problem, or are there things I can look at to try to reduce latency even on heavily-loaded bandwidth?

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• Best Firewall product for hosting/housing environment?

  - by Raffael Luthiger

  I am searching for a firewall product (appliance or software) for an hosting/housing environment. The biggest problem is that the rules get very complex as more customers are behind the firewall. Some have only one server, others have a whole subnet. Some need NAT, some a VPN endpoint. Some customers want to only allow port http, others ssh as well. So the device needs to be able to support VLANs and it should be possible to group the rules per customer. Speed is another important point. And being able to manage redundant devices easily. I am searching for something that doesn't have all the extras like spam filter etc. I was searching a lot on the net but either they had all those extras as well (and with is an overloaded configuration interface) or they missed some of the features I need (e.g. VLAN). The VPN endpoint is not the an important criteria. We were thinking about a separate machine for it.

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• What is the advantage of not running as root? [closed]

  - by Shmuel Brill

  Possible Duplicate: What's wrong with always being root? All modern brands of Linux highly discourage (or disable) one from running as root instead of a normal user. I do not understand why. As a "normal" user, one could Download a rouge program from the internet. Run it (After all, one isn't root, what can it do). It installs itself in .bashrc or .xinitrc It writes a rouge "sudo" and "su" and adds . to the path Not noticing that . is in path, one runs sudo. The rouge program now has root password and can do anything it wants in the system. Even if 3-6 doesn't happen, the program could still Be part of a botnet. Read all files in the home directory and send them back (mine for SS#, Credit Card numbers, bank account numbers, etc). Send spam. Run a backdoor server to allow an attacker a chance to connect to the machine to determine vulnerabilities. It seems that the whole "permissions" thing (root/non-root) is just to prevent amateur crackers from getting into the system, so the question is: Is there a point in avoiding running as root, and is there a way to protect oneself if one wants to run unsafe code?

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• Blocking requests from specific IPs using IIS Rewrite module

  - by Thomas Levesque

  I'm trying to block a range of IP that is sending tons of spam to my blog. I can't use the solution described here because it's a shared hosting and I can't change anything to the server configuration. I only have access to a few options in Remote IIS. I see that the URL Rewrite module has an option to block requests, so I tried to use it. My rule is as follows in web.config: <rule name="BlockSpam" enabled="true" stopProcessing="true"> <match url=".*" /> <conditions logicalGrouping="MatchAll" trackAllCaptures="false"> <add input="{REMOTE_ADDR}" pattern="10\.0\.146\.23[0-9]" ignoreCase="false" /> </conditions> <action type="CustomResponse" statusCode="403" /> </rule> Unfortunately, if I put it at the end of the rewrite rules, it doesn't seem to block anything... and if I put it at the start of the list, it blocks everything! It looks like the condition isn't taken into account. In the UI, the stopProcessing option is not visible and is true by default. Changing it to false in web.config doesn't seem to have any effect. I'm not sure what to do now... any ideas?

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• netlogon errors

  - by rorr

  I have two instances of mssql 2005 and am using CA XOSoft replication. The master is a failover cluster and the replica is a standalone server. They are all running Server 2003 sp2 x64. Same patch levels on all servers. This setup has worked great for several months until we recently restricted the RPC ports on both nodes of the master(5000 - 6000 using rpccfg.exe). We have to implement egress filtering, thus the limiting of the ports. We began receiving login errors for sql windows authentication and NETLOGON Event ID: 5719: This computer was not able to set up a secure session with a domain controller in domain due to the following: Not enough storage is available to process this command. This may lead to authentication problems. Make sure that this computer is connected to the network. If the problem persists, please contact your domain administrator. We also see group policies failing to update and cluster file shares go offline at the same time. The RPC ports were set back to default when we started seeing these problems and the servers rebooted, but the problems persist. The domain controllers are not showing any errors. Running dcdiag and netdiag shows everything is fine. We have noticed that the XOSoft service ws_rep.exe is using a lot of handles(8 - 9k), about the same number that sqlserver is using. As soon as xosoft replication is stopped the login errors cease and everything functions correctly. I have opened a ticket with CA for XOSoft, but I'm not sure that the problem is actually xosoft, but that it is the one bringing the problem to light. I'm looking for tips on debugging RPC problems. Specifically on limiting the ports and then reverting the changes.

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• Identifying mail account used in CRAM-MD5 transaction

  - by ManiacZX

  I suppose this is one of those where the tool for identifying the problem is also the tool used for taking advantage of it. I have a mail server that I am seeing emails that spam is being sent through it. It is not an open relay, the messages in question are being sent by someone authenticating to the smtp with CRAM-MD5. However, the logs only capture the actual data passed, which has been hashed so I cannot see what user account is being used. My suspicion is a simple username/password combo or a user account's password has otherwise been compromised, but I cannot do much about it without knowing what user it is. Of course I can block the IP that is doing it, but that doesn't fix the real problem. I have both the CRAM-MD5 Base64 challenge string and the hashed client auth string containing the username, password and challenge string. I am looking for a way to either reverse this (which I haven't been able to find any information on) or otherwise I suppose I need a dictionary attack tool designed for CRAM-MD5 to run through two lists, one for username and one for password and the constant of the challenge string until it finds a matching result of the authentication string I have logged. Any information on reversing using the data I have logged, a tool to identify it or any alternative methods you have used for this situation would be greatly appreciated.

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• Amazon AWS Ec2 instance, Elastic IP, Domain name from external domainseller, and Google Apps for Email

  - by Sid

  We are hosting our site on an Ec2 instance. Our Elastic IP is w.x.y.z and Public DNS is: ec2-w-x-y-z.compute-1.amazonaws.com. We've bought a domain name domainname.com from a lesser known domain-name-seller. We added an A-record pointing domainname.com to w.x.y.z. Will this work or do we need a CNAME record to point to the same too? We wanted to use Google apps for emailing so adjusted the TXT/MX records according to the Google Apps instructions to be able to send/recv email using @domainname.com email addresses. Have we got it right, more important, we came across queries relating to email sent from ec2-w-x-y-z.compute-1.amazonaws.com (our users can send email from their onsite accounts) going to spam (rDNS not pointing to domainname.com but to ec2-w-x-y-z.compute-1.amazonaws.com). How can we fix this? We came across SPF records, do they provide a complete solution? We aren't sure as to how to use them. Can you help pls? Thank you, Sid

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• Wifi network undetectable on a Lenovo G470

  - by Rex

  I have a WPA2 secured network with a visible SSID at home that works perfectly fine with a Dell laptop,a HP netbook and sundry mobile phones. When I try connecting my sister's Lenovo G470, it refuses to detect the wifi network no matter what, but shows up the neighbors' networks. The Lenovo also works correctly at her office. Both laptops run Windows 7. Already tried/checked the following: Manually configure wifi network settings (copied over from the Dell) Ensure there is no MAC address filtering on the router. Ensure router DHCP server is not running out of addresses to assign (I have set it to allocate upto 10). Reboot laptop, router etc. Is this a known problem, and is there anything else one could try? Update - The problematic Lenovo uses Windows 7 Home Basic while the Dell that works uses Home Premium and the HP netbook uses Starter edition - if that makes any difference. Further update - It is able to connect if I reboot into safe mode with networking. However in 'normal' mode it shows up the network sporadically, and then says there was an error connecting to it. All the network parameters, password, encryption, etc etc are EXACTLY the same as they are on the Dell.

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• Does WebDAV even work on IIS 7? I say nay

  - by FlavorScape

  I've tried every configuration from the top 10 stack overflow and server fault results for WebDAV 405 on IIS (for verb PROPFIND and PUT). I'm running server 2008 SP2. Followed all the instructions here. I'm no stranger to configuring servers. This has gotten nowhere after 8 hours. Confirmed system.webserver in applicationhost.config: <add name="WebDAV" path="*" verb="PROPFIND,PROPPATCH,MKCOL,PUT,COPY,DELETE,MOVE,LOCK,UNLOCK" modules="WebDAVModule" resourceType="Unspecified" requireAccess="None" /> Port 443 with basic auth, same issue. Tried port 80 with windows auth. Broken. (405) Windows authentication. Check. Added authoring rules for default site and application. Check. Not the firewall. Check. added "Desktop Experience" role feature Tried HTTPS with Basic Authentication on port 443. Does not work. No other services are running like Sharepoint. Check. confirmed user has read/write NT level permissions for the folder/virtual dir tried net use * http://localhost /user:MYDOMAIN\me myPass get error 1920, if I don't authenticate I get error 67 confirmed I'm not applying filtering to WebDAV: <requestFiltering> <fileExtensions applyToWebDAV="false" /> <verbs applyToWebDAV="false" /> <hiddenSegments applyToWebDAV="false" /> 405 - HTTP verb used to access this page is not allowed. The page you are looking for cannot be displayed because an invalid method (HTTP verb) was used to attempt access. SHOULD I JUST GIVE UP? Other questions that helped none: 405 - ‘Method not Allowed’ adding service hosted in IIS7 webdav on iis7.5 - simply cannot make it work http://studentguru.gr/b/kingherc/archive/2009/11/21/webdav-for-iis-7-on-windows-server-2008-r2.aspx

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• do not require smtp authentication for a specific domain using hMail server

  - by toryan

  One of my clients has a needlessly complex e-mail setup for a couple of domains, which is causing problems when they try to send e-mail between them. They have a couple of domains where mail follows a slightly weird path: Users connect to an Exchange server to send e-mail The exchange server relays the message to an ISP-owned SMTP server as a smart host The ISPs server delivers the mail to the mail exchanger specified in DNS The mail exchanger is another server that runs hMailServer The Exchange server connects to the hMail server via POP3 and retrieves the messages. The problem arises when they send mail between addresses in the same domain, or two addresses that are present on the hMail server. hMail requires SMTP authentication when sending from local to local addresses, so the messages don't arrive. Removing SMTP authentication isn't really an option, as the server has been the target of spam being sent from spoofed local addresses. SMTP authentication prevents this. It is possible to add the ISP's mail server as an IP range with specific rules, but this seems inelegant. Bearing in mind I only have access to the hMail server and not the Exchange server, is there a better way of going about this?

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