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• Network Management Cable Labeling Techniques and their alternatives [closed]

  - by Alex

  Possible Duplicate: What is the most effective solution you used to label cables? Yes i know there are a lot of howtos and already answered questions about this topic, like this one: How do you organise the cables in your racks? Currently i am searching the web for different techniques (alternatives) for labeling the cables at the server racks and/or data centers. Unfortunately i do not have any experience with labeling/documentation of network cables in a large scale. As far as I could lookup by now the current labeling techniques are coloring and a self defined print-labeling technique (numbering, text) maybe also according to a standard which are usually used. I want to know if QR, RFID (ok RFID in a data center would be stupid due to the radio frequency wouldn't it be?), Barcodes or similar (??) have already been used by some administrators or why they did not consider such techniques at all? Too complicated (with QR scanner etc..) if you are in front of the cables and want to get quick feedback for what the cable is? What alternatives are out there? Advantages/Disadvantages? Best-Practice? I would appreciate any help on this topic, thank you! Regards, Alex

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• Configuring SMB shares in OS X

  - by Craig Walker

  I'm at my wit's end trying to control SMB file sharing on my Mac. (OS X 10.5 Leopard). I want to do something fairly simple: share a particular (non-home, non-Public) folder over my my SMB/Windows network with two users (accounts are local to my Mac), and share no other folders with anyone. The instructions on the internet are fairly straightforward: add the folders to be shared to the File Sharing panel of the Sharing System Preferences pane: ..and ensure that I'm sharing through SMB: However, when I actually try to connect via a SMB client (Windows XP in this case), the share does not appear. I see my home directory, "Macintosh HD", and my printers, but not the folder I just shared. I ensured that the underlying directory had the proper permissions (since this seems to affect share visibility) and that the "Shared Folder" checkbox was checked: ...but this didn't have any effect. I checked /etc/smb.conf but there was nothing obviously out of place there. I've also restarted smbd and rebooted. What else should I be looking for?

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• How does enterprise failover, such as with google.com, actually work?

  - by Alex Regan

  We have a few fedora systems that are configured for web, FTP, and email services. We'd like to mirror these services, so that we can provide near 100% reliability for our users. I'm a fairly experienced Linux administrator, but don't have much experience with redundant systems. What is the best way to do this? How does google and amazon do it? Google.com resolves to multiple IP addresses, but if my local desktop caches one of the IPs that are unreachable, I'm going to get a failed connection message. How do they prevent that from happening? If one of their servers goes down, how is it automatically redirected to another system, without the end-user ever knowing it? I understand there are failover devices, but they're only for failing over the system itself, not a complete network. Let's say we have the worst-case scenario, such as my primary system becomes inaccessible. What are the fundamental components that are used on Linux systems to provide this capability? I'm looking for concepts, or approaches, not answers like "check out openstack". What are the actual pieces that make up the solution? What has to be done to implement this capability? Hopefully my question is clear. I'd like to know what the pieces are that make up a failover system and what approach is taken by successful organizations that implement it. Thanks again, Alex

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• VM Tuning to enhance performance

  - by Tiffany Walker

  vm.bdflush = 100 1200 128 512 15 5000 500 1884 2 vm.dirty_ratio = 20 vm.min_free_kbytes = 300000 That means that the MOST dirty data that can be in RAM is 20% and that there will always be 300MB RAM that linux CANNOT use to cache files right? What I am trying to do is ensure that there is always room left for service to spawn and use RAM. I have 8GB of ram and hosting websites with PHP so I want to have more free RAM on stand by instead of seeing myself on 50MB of RAM free.

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• Windows Vista Nested Desktop Folders Problem

  - by Samuel Walker

  I have no idea how, nor when this happened, and it's started to really quite annoy me. When navigating through Explorer, by clicking on Icons I have C:\Users\Samuel\Desktop (Icon is the blue special Desktop icon), which contains the items I see on my Desktop. I then have the following folder: C:\Users\Samuel\Desktop (Icon is the standard yellow folder icon), which contains many program shortcuts, and is completely seperate from the other C:\Users\Samuel\Desktop Then in the Yellow Icon Desktop I have the sub-folder Desktop with the blue icon that is a direct mirror of the blue C:\Users\Samuel\Desktop folder (as in a new folder / file shows up in both). In explorer when I directly type C:\Users\Samuel\Desktop I am taken to the Yellow folder version. If I go to C:\Users\Samuel\Desktop\Desktop I am taken to the Blue folder version. Finally, from cmd cd'ing to C:\Users\Samuel\Desktop takes me to the Yellow folder version whilst C:\Users\Samuel\Desktop\Desktop takes me to the blue folder version. How on earth can I get rid of the yellow folder version leaving the blue C:\Users\Samuel\Desktop. I can't delete either as it says they're in use. UPDATE: Ok, so it looks like doing a dir from cmd lists only one Desktop folder - the Yellow one. In addition, it looks like I can't delete either of them (given that they both contain my 'Desktop'

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• KeePass justification

  - by Jeff Walker

  I work at a place that tries to take security seriously, but sadly, they often fail. Currently, one of the major ways they fail is password management. I personally have about 20 accounts (my personal user id on lots of machines). For shared "system" accounts, there are about 45 per environment; development, test, and production. I have access to 2 of those, so my personal total is somewhere around 115 accounts. Passwords have to be at least 15 characters with some extensive but standard complexity constraints, and have to be changed every 60 days or so (system accounts every year). They also should not be the same for different accounts, but that isn't enforced. Think DoD-type standards. There is no way to remember and keep up with this. It just isn't humanly possible, as far as I'm concerned. This might be a good justification of a centralized account management system, a la LDAP or ActiveDirectory, but that is a totally different battle. Currently the solution is an Excel spreadsheet. They use Excel to put a password on it, and then most people make a copy and remove the password. This makes my stomach turn. I use KeePass for this problem and it manages all of my account very well. I like the features like auto-typing, grouping, plugins, password generation, etc. It uses AES-256 encryption via the .Net framework, and while not FIPS compliant, it has a very good reputation. The only problem is that they are also very careful about using randomly downloaded software. So we have to justify every piece of software on our workstations. I have been told that they really don't want me to use this, be cause of the "sensitive nature" of storing passwords. sigh My justification has to be "VERY VERY strong". I have been tasked with writing a justification for KeePass, but as I am lazy, I would like any input that I can get from the community. What do you recommend? Is there something out there that is better or more respected than KeePass? Is there any security experts saying interesting things on this topic? Anything will help at this point. Thanks.

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• Creating reverse DNS entries which resolve [closed]

  - by Tiffany Walker

  Possible Duplicate: Reverse DNS - how to correctly configure for SMTP delivery I ran a DNS check and ended up with the following error: FAIL: Found reverse DNS entries which don't resolves IP-IP-IP-IP.HOST.DOMAIN.TLD ? ??? All IP's reverse DNS entries should resolve back to IP address (MX record's name -> IP -> IP Reverse -> IP). Many mail servers are configured to reject e-mails from IPs with inconsistent reverse DNS configuration. How do I properly configure and it so it goes to an IP?

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• Exchange 2010 Mail Enabled Public Folder Unable to Recieve External (anon) e-mail.

  - by Alex

  Hello All, I am having issues with my "Public Folders" mail enabled folders receiving e-mails from external senders. The folder is setup with three Accepted Domains (names changed for privacy reasons): 1 - domain1.com (primary & Authoritative) 2 - domain2.com (Authoritative) 3 - domain3.com (Authoritative) When someone attempts to send an e-mail to [email protected] from inside the organization, the e-mail is received and placed in the appropriate folder. However, when someone tries to send an e-mail from outside the organization (such as a gmail account), the following error message is received: "Google tried to deliver your message, but it was rejected by the recipient domain. We recommend contacting the other email provider for further information about the cause of this error. The error that the other server returned was: 554 554 Recipient address rejected: User unknown (state 14)." When I try to send an e-mail to the same folder, using the same e-mail address above ([email protected]), but with domain2.com instead of domain3.com, it works as intended (both internal & external). I have checked, double checked, and triple checked my DNS settings comparing those from domain2 & domain3 with them both appearing identical. I have tried recreating the folders in question with the same results. I have also ran Get-PublicFolderClientPermission "\Web Programs\folder" with the following results for user anonymous: RunspaceId : 5ff99653-a8c3-4619-8eeb-abc723dc908b Identity : \Web Programs\folder User : Anonymous AccessRights : {CreateItems} Domain2.com & Domain3.com are duplicates of each other, but only domain2.com works as intended. All other exchange functions are functioning properly. If anyone out there has any suggestions, I would love to hear them. I've just hit a brick wall. Thanks for all your help in advance! --Alex

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• Fixing Poor Email

  - by Tiffany Walker

  I'm having an issue with SenderBase. My IPs are not blocked in any BLs but people who use SenderBase/Ciscos stuff do not get my emails. Is this because my email system is setup poorly? They list the following: Your email server or a computer in your network may be infected with malware and may be used to send spam. You may have an insecure network which is allowing other parties to use your network to send spam. Your email server may be misconfigured and might relay spam. You may be utilizing a dynamic IP that is not allowed to relay email directly to the Internet. I have just my site running CPanel. As far as I know there is no spam or abuse. What should I check to ensure that the mail systems (Exim) are up to standards? I have the server pretty well configured so I just can't see the system being abused without me knowing it. What standards should I be ensuring my e-mail server aligns up to?

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• Editing Exim's Banner

  - by Tiffany Walker

  Is there a way to place EXIM smtp banner on 1 line instead of 3 lines? The banner starts with 220. I've been searching but can not find a way. under /etc/exim.conf I have #todd host's smtp_banner = "${primary_hostname} ESMTP Exim ${version_number} \ \#${compile_number} ${tod_full} \n\ We do not authorize the use of this system to transport unsolicited, \n\ and/or bulk e-mail." do i make that one line?

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• Forward Apache to Django dev server

  - by Alex Jillard

  I'm trying to get apache to forward all requests on port 80 to 127.0.0.1:8000, which is where the django dev server runs. I think I have it forwarding properly, but there must be an issue with 127.0.0.1:8000 not being run by apache? I'm running the django dev server in an ubuntu vmware instance, and I'd other people in the office to see the apps in development without having to promote anything to our actual dev/staging servers. Right now the virtual machine picks up an IP for itself, and when I point a browser to that url with the defualt apache config, I get the default apache page. I've since changed the httpd.conf file to the following to try and get it to forward the requests to the django dev server: ServerName localhost <Proxy *> Order deny,allow Allow from all </Proxy> <VirtualHost *> ServerName localhost ServerAdmin [email protected] ProxyRequests off ProxyPass * http://127.0.0.1:8000 </VirtualHost> All I get are 404s with this, and in error.log I get the following (192.168.1.101 is the IP of my computer 192.168.1.142 is the IP of the virtual machine): [Mon Mar 08 08:42:30 2010] [error] [client 192.168.1.101] File does not exist: /htdocs

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• Apache restart does not load new php.ini

  - by Tiffany Walker

  Never had this problem till updated CPanel today? Maybe that is part the problem? I only have the one php.ini file # /usr/local/bin/php --info | grep php.ini Configure Command => './configure' '--disable-cgi' '--disable-fileinfo' '--enable-bcmath' '--enable-calendar' '--enable-exif' '--enable-ftp' '--enable-gd-native-ttf' '--enable-libxml' '--enable-magic-quotes' '--enable-mbstring' '--enable-pdo=shared' '--enable-soap' '--enable-sockets' '--enable-zip' '--prefix=/usr/local' '--with-bz2' '--with-config-file-path=/usr/local/lib' '--with-config-file-scan-dir=/usr/local/lib/php.ini.d' '--with-curl=/opt/curlssl/' '--with-curlwrappers' '--with-freetype-dir=/usr' '--with-gd' '--with-imap=/opt/php_with_imap_client/' '--with-imap-ssl=/usr' '--with-jpeg-dir=/usr' '--with-kerberos' '--with-libdir=lib64' '--with-libexpat-dir=/usr' '--with-libxml-dir=/opt/xml2' '--with-libxml-dir=/opt/xml2/' '--with-mcrypt=/opt/libmcrypt/' '--with-mysql=/usr' '--with-mysql-sock=/var/lib/mysql/mysql.sock' '--with-mysqli=/usr/bin/mysql_config' '--with-openssl=/usr' '--with-openssl-dir=/usr' '--with-pcre-regex=/opt/pcre' '--with-pdo-mysql=shared' '--with-pdo-sqlite=shared' '--with-pic' '--with-png-dir=/usr' '--with-pspell' '--with-sqlite=shared' '--with-tidy=/opt/tidy/' '--with-xmlrpc' '--with-xpm-dir=/usr' '--with-xsl=/opt/xslt/' '--with-zlib' '--with-zlib-dir=/usr' '--with-gettext' Configuration File (php.ini) Path => /usr/local/lib Loaded Configuration File => /usr/local/lib/php.ini Scan this dir for additional .ini files => /usr/local/lib/php.ini.d # /usr/bin/php --info | grep php.ini <tr><td class="e">Configure Command </td><td class="v"> &#039;./configure&#039; &#039;--disable-fileinfo&#039; &#039;--enable-bcmath&#039; &#039;--enable-calendar&#039; &#039;--enable-exif&#039; &#039;--enable-ftp&#039; &#039;--enable-gd-native-ttf&#039; &#039;--enable-libxml&#039; &#039;--enable-magic-quotes&#039; &#039;--enable-mbstring&#039; &#039;--enable-pdo=shared&#039; &#039;--enable-soap&#039; &#039;--enable-sockets&#039; &#039;--enable-zip&#039; &#039;--prefix=/usr&#039; &#039;--with-bz2&#039; &#039;--with-config-file-path=/usr/local/lib&#039; &#039;--with-config-file-scan-dir=/usr/local/lib/php.ini.d&#039; &#039;--with-curl=/opt/curlssl/&#039; &#039;--with-curlwrappers&#039; &#039;--with-freetype-dir=/usr&#039; &#039;--with-gd&#039; &#039;--with-imap=/opt/php_with_imap_client/&#039; &#039;--with-imap-ssl=/usr&#039; &#039;--with-jpeg-dir=/usr&#039; &#039;--with-kerberos&#039; &#039;--with-libdir=lib64&#039; &#039;--with-libexpat-dir=/usr&#039; &#039;--with-libxml-dir=/opt/xml2&#039; &#039;--with-libxml-dir=/opt/xml2/&#039; &#039;--with-mcrypt=/opt/libmcrypt/&#039; &#039;--with-mysql=/usr&#039; &#039;--with-mysql-sock=/var/lib/mysql/mysql.sock&#039; &#039;--with-mysqli=/usr/bin/mysql_config&#039; &#039;--with-openssl=/usr&#039; &#039;--with-openssl-dir=/usr&#039; &#039;--with-pcre-regex=/opt/pcre&#039; &#039;--with-pdo-mysql=shared&#039; &#039;--with-pdo-sqlite=shared&#039; &#039;--with-pic&#039; &#039;--with-png-dir=/usr&#039; &#039;--with-pspell&#039; &#039;--with-sqlite=shared&#039; &#039;--with-tidy=/opt/tidy/&#039; &#039;--with-xmlrpc&#039; &#039;--with-xpm-dir=/usr&#039; &#039;--with-xsl=/opt/xslt/&#039; &#039;--with-zlib&#039; &#039;--with-zlib-dir=/usr&#039; </td></tr> <tr><td class="e">Configuration File (php.ini) Path </td><td class="v">/usr/local/lib </td></tr> <tr><td class="e">Loaded Configuration File </td><td class="v">/usr/local/lib/php.ini </td></tr> <tr><td class="e">Scan this dir for additional .ini files </td><td class="v">/usr/local/lib/php.ini.d </td></tr> everytime I restart apache I still seem to be running the old one. Nothing changes. I removed phpinfo() and ini_set() from the php.ini but I still can't use them. # service httpd -k restart [Fri Oct 26 15:27:10 2012] [warn] module hostinglimits_module is already loaded, skipping [Fri Oct 26 15:27:10 2012] [warn] NameVirtualHost 127.0.0.1:8081 has no VirtualHosts There is also no php.ini files under the vhosts or .htaccess. # /usr/bin/php -v PHP 5.3.15 (cgi-fcgi) (built: Aug 4 2012 21:33:58) Copyright (c) 1997-2012 The PHP Group Zend Engine v2.3.0, Copyright (c) 1998-2012 Zend Technologies with eAccelerator v0.9.6.1, Copyright (c) 2004-2010 eAccelerator, by eAccelerator with the ionCube PHP Loader v4.2.2, Copyright (c) 2002-2012, by ionCube Ltd., and with Zend Guard Loader v3.3, Copyright (c) 1998-2010, by Zend Technologies with Suhosin v0.9.33, Copyright (c) 2007-2012, by SektionEins GmbH and # /usr/local/bin/php -v PHP 5.3.15 (cli) (built: Aug 4 2012 21:34:27) Copyright (c) 1997-2012 The PHP Group Zend Engine v2.3.0, Copyright (c) 1998-2012 Zend Technologies with eAccelerator v0.9.6.1, Copyright (c) 2004-2010 eAccelerator, by eAccelerator with the ionCube PHP Loader v4.2.2, Copyright (c) 2002-2012, by ionCube Ltd., and with Zend Guard Loader v3.3, Copyright (c) 1998-2010, by Zend Technologies with Suhosin v0.9.33, Copyright (c) 2007-2012, by SektionEins GmbH Nothing shows up in the error logs either. The only errors we get are under the vhost's with error_log saying phpinfo and ini_set are disabled. EDIT: Both php binaries use the same php.ini file EDIT: Running php as mod_fgcid.so with suexec EDIT: From SSH I see the correct values for PHP from the php.ini file being loaded from both binaries When using php from apache [26-Oct-2012 20:25:34 UTC] PHP Warning: phpinfo() has been disabled for security reasons in /home/jake/public_html/phpinfo.php on line 1 EDIT: /usr/bin/php is the correct PHP file. Forgot to mention. It is the one in the wrapper script.

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• Mod_security questions and on User-Agent types

  - by Tiffany Walker

  Very new to mod_sec I want to block a UA string and I noticed there are a few types: SecRule HTTP_User-Agent SecRule REQUEST_HEADERS:User-Agent What is the real difference between them? My block: SecRule REQUEST_HEADERS:User-Agent "perl" "phase:2,pass,msg:'Perl based user agent identified'" Do I need to set a SecDefaultAction phase:2,deny,status:403,log,auditlog before that? Then any SecRule below that follows that action right?

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• Re-sizing disk partition linux/vm

  - by Tiffany Walker

  I VM Player running a linux guest and I was wanting to know how do I expand the disk? In the VM player I gave more disk space but I am not sure how to mount/expand/connect the new disk space to the system. My old disk space was 14GB [root@localhost ~]# df -h / Filesystem Size Used Avail Use% Mounted on /dev/mapper/VolGroup-lv_root 14G 4.5G 8.2G 36% / Then I expanded it and now I see sda2 which is the new space? [root@localhost ~]# fdisk -l Disk /dev/sda: 128.8 GB, 128849018880 bytes 255 heads, 63 sectors/track, 15665 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x000cd44d Device Boot Start End Blocks Id System /dev/sda1 * 1 64 512000 83 Linux Partition 1 does not end on cylinder boundary. /dev/sda2 64 2611 20458496 8e Linux LVM Disk /dev/mapper/VolGroup-lv_root: 14.5 GB, 14537457664 bytes 255 heads, 63 sectors/track, 1767 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/mapper/VolGroup-lv_swap: 6408 MB, 6408896512 bytes 255 heads, 63 sectors/track, 779 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Do I need to mount the new space first? resize2fs -p /dev/mapper/VolGroup-lv_root 108849018880 resize2fs 1.41.12 (17-May-2010) The containing partition (or device) is only 3549184 (4k) blocks. You requested a new size of 1474836480 blocks. resize2fs -p /dev/mapper/VolGroup-lv_root 128849018880 resize2fs 1.41.12 (17-May-2010) resize2fs: Invalid new size: 128849018880 [root@localhost ~]# lvextend -L+90GB /dev/mapper/VolGroup-lv_root Extending logical volume lv_root to 103.54 GiB Insufficient free space: 23040 extents needed, but only 0 available [root@localhost ~]# lvextend -L90GB /dev/mapper/VolGroup-lv_root Extending logical volume lv_root to 90.00 GiB Insufficient free space: 19574 extents needed, but only 0 available EDIT: So after trying pvcreate/vgextend nothing has so far worked. I'm guessing the new disk space added from VM Player is not showing up? pvscan PV /dev/sda2 VG VolGroup lvm2 [19.51 GiB / 0 free] Total: 1 [19.51 GiB] / in use: 1 [19.51 GiB] / in no VG: 0 [0 ]

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• Kernel Logging disabled?

  - by Tiffany Walker

  uname -a Linux host 2.6.32-279.9.1.el6.i686 #1 SMP Tue Sep 25 20:26:47 UTC 2012 i686 i686 i386 GNU/Linux And start ups: ls /etc/init.d/ abrt-ccpp certmonger dovecot irqbalance matahari-broker mdmonitor nfs proftpd rpcbind single ypbind abrtd cgconfig functions kdump matahari-host messagebus nfslock psacct rpcgssd smartd abrt-oops cgred haldaemon killall matahari-network mysqld ntpd qpidd rpcidmapd sshd acpid cpuspeed halt ktune matahari-rpc named ntpdate quota_nld rpcsvcgssd sssd atd crond httpd lfd ma tahari-service netconsole oddjobd rdisc rsyslog sysstat auditd csf ip6tables lvm2-lvmetad matahari-sysconfig netfs portreserve restorecond sandbox tuned autofs cups iptables lvm2-monitor matahari-sysconfig-console network postfix rngd saslauthd udev-post But when I installed CSF/LFD I am getting nothing. LFD does not create lfd.log and nor are any blocks being logged in /var/log/messages either from the firewall. This is not natural. I looked for klogd but maybe I am looking in the wrong place for it to see if it is enabled? ls /etc/init.d/syslog ls: cannot access /etc/init.d/syslog: No such file or directory Also noticed no syslog? Also noticed this: csf -d 84.113.21.201 Adding 84.113.21.201 to csf.deny and iptables DROP... iptables: No chain/target/match by that name. iptables: No chain/target/match by that name. I've never seen this before and this is a dedicated box. Also: ./csftest.pl Testing ip_tables/iptable_filter...OK Testing ipt_LOG...OK Testing ipt_multiport/xt_multiport...OK Testing ipt_REJECT...OK Testing ipt_state/xt_state...OK Testing ipt_limit/xt_limit...OK Testing ipt_recent...OK Testing xt_connlimit...OK Testing ipt_owner/xt_owner...OK Testing iptable_nat/ipt_REDIRECT...OK Testing iptable_nat/ipt_DNAT...OK RESULT: csf should function on this server iptables -L Chain INPUT (policy ACCEPT) target prot opt source destination Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination

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• Windows 7 not creating the FTP ROOT folder

  - by Jim Walker

  I am trying to set up ftp service in windows 7. I have installed the IIS console and the ftp service, but no ftp root folder. I only use this to communicate with a CNC machine with programing. Any help would be great

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• SSL error: error:0B080074:x509 certificate routines:X509_check_private_key:key values mismatch

  - by Tiffany Walker

  ERROR: SSL error: error:0B080074:x509 certificate routines:X509_check_private_key:key values mismatch STEPS: openssl genrsa -out SITE.TLD.key 2048 openssl req -new -key SITE.TLD.key -out SITE.TLD.csr (send CSR to SSL site to sign) add CERT to SITE.TLD.crt add CA to SITE.TLD.ca chained them: cat SITE.TLD.crt SITE.TLD.ca > chained.cert Any Idea what I am doing wrong? I am using LiteSpeed HTTPd

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• Tail the filename, not the file

  - by Craig Walker

  In UNIX (OS X BSD to be precise), I have a "tail -f" command on a log file. From time to time I want to delete this log file so I can more easily review it in my text editor. I delete the file, and then my program recreates it after new activity. However, my tail command (and anything else that was watching the old log file) doesn't update; it's still watching the old, deleted log file. I think I understand why this is (file names simply being pointers to blocks of file data). I'd like to know how I can work around this. Ideally, my tail command (and anything else I point to the file) would be able to read the data from the new file when the file name has been deleted and recreated. How would I do this?

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• Configuring SMB shares in OS X

  - by Craig Walker

  I'm at my wit's end trying to control SMB file sharing on my Mac. (OS X 10.5 Leopard). I want to do something fairly simple: share a particular (non-home, non-Public) folder over my my SMB/Windows network with two users (accounts are local to my Mac), and share no other folders with anyone. The instructions on the internet are fairly straightforward: add the folders to be shared to the File Sharing panel of the Sharing System Preferences pane: ..and ensure that I'm sharing through SMB: However, when I actually try to connect via a SMB client (Windows XP in this case), the share does not appear. I see my home directory, "Macintosh HD", and my printers, but not the folder I just shared. I ensured that the underlying directory had the proper permissions (since this seems to affect share visibility) and that the "Shared Folder" checkbox was checked: ...but this didn't have any effect. I checked /etc/smb.conf but there was nothing obviously out of place there. I've also restarted smbd and rebooted. What else should I be looking for?

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• rsnapshot - not correctly archiving mysql databases

  - by Tiffany Walker

  My rsnapshot configuration: snapshot_root /.snapshots/ backup /home/user localhost/ backup_script /usr/local/backup_mysql.sh localhost/mysql/ Using this file: NOW=$(date +"%m-%d-%Y") # mm-dd-yyyy format FILE="" # used in a loop ### Server Setup ### #* MySQL login user name *# MUSER="root" #* MySQL login PASSWORD name *# MPASS="YOUR-PASSWORD" #* MySQL login HOST name *# MHOST="127.0.0.1" #* MySQL binaries *# MYSQL="$(which mysql)" MYSQLDUMP="$(which mysqldump)" GZIP="$(which gzip)" # get all database listing DBS="$($MYSQL -u $MUSER -h $MHOST -p$MPASS -Bse 'show databases')" # start to dump database one by one for db in $DBS do FILE=$BAK/mysql-$db.$NOW-$(date +"%T").gz # gzip compression for each backup file $MYSQLDUMP --single-transaction -u $MUSER -h $MHOST -p$MPASS $db | $GZIP -9 > $FILE done It dumps the databases under / I then tried with the following: http://bash.cyberciti.biz/backup/rsnapshot-remote-mysql-backup-shell-script/ I got: rsnapshot hourly ---------------------------------------------------------------------------- rsnapshot encountered an error! The program was invoked with these options: /usr/bin/rsnapshot hourly ---------------------------------------------------------------------------- ERROR: backup_script /usr/local/backup_mysql.sh returned 1 WARNING: Rolling back "localhost/mysql/" ls -la /.snapshots/hourly.0/localhost/mysql total 8 drwxr-xr-x 2 root root 4096 Nov 23 17:43 ./ drwxr-xr-x 4 root root 4096 Nov 23 18:20 ../ What exactly am I doing wrong? EDIT: # /usr/local/backup_mysql.sh *** Dumping MySQL Database *** Database> information_schema..cphulkd..eximstats..horde..leechprotect..logaholicDB_ns1..modsec..mysql..performance_schema..roundcube..test.. *** Backup done [ files wrote to /.snapshots/tmp/mysql] *** root@ns1 [~]# ls -la /.snapshots/tmp/mysql total 8040 drwxr-xr-x 2 root root 4096 Nov 23 18:41 ./ drwxr-xr-x 3 root root 4096 Nov 23 18:41 ../ -rw-r--r-- 1 root root 1409 Nov 23 18:41 cphulkd.18_41_45pm.gz -rw-r--r-- 1 root root 113522 Nov 23 18:41 eximstats.18_41_45pm.gz -rw-r--r-- 1 root root 4583 Nov 23 18:41 horde.18_41_45pm.gz -rw-r--r-- 1 root root 71757 Nov 23 18:41 information_schema.18_41_45pm.gz -rw-r--r-- 1 root root 692 Nov 23 18:41 leechprotect.18_41_45pm.gz -rw-r--r-- 1 root root 2603 Nov 23 18:41 logaholicDB_ns1.18_41_45pm.gz -rw-r--r-- 1 root root 745 Nov 23 18:41 modsec.18_41_45pm.gz -rw-r--r-- 1 root root 138928 Nov 23 18:41 mysql.18_41_45pm.gz -rw-r--r-- 1 root root 1831 Nov 23 18:41 performance_schema.18_41_45pm.gz -rw-r--r-- 1 root root 3610 Nov 23 18:41 roundcube.18_41_45pm.gz -rw-r--r-- 1 root root 436 Nov 23 18:41 test.18_41_47pm.gz MySQL Backup seems fine.

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• Making nginx withstand flood attacks

  - by Tiffany Walker

  How can I make it stand stand against attacks better? Are their plugins. Looking for a way to RATE LIMIT and remain up and not slow down. My Setup: user nobody; # no need for more workers in the proxy mode worker_processes 4; worker_cpu_affinity 0001 0010 0100 1000; worker_priority -2; error_log /var/log/nginx/error.log info; worker_rlimit_nofile 40480; events { worker_connections 5120; # increase for busier servers use epoll; # you should use epoll here for Linux kernels 2.6.x } http { server_name_in_redirect off; server_names_hash_max_size 10240; server_names_hash_bucket_size 1024; include mime.types; default_type application/octet-stream; server_tokens off; disable_symlinks if_not_owner; sendfile on; tcp_nopush on; tcp_nodelay on; keepalive_timeout 5; gzip on; gzip_vary on; gzip_disable "MSIE [1-6]\."; gzip_proxied any; gzip_http_version 1.1; gzip_min_length 1000; gzip_comp_level 9; gzip_buffers 16 8k; # You can remove image/png image/x-icon image/gif image/jpeg if you have slow CPU gzip_types text/plain text/xml text/css application/x-javascript application/xml image/png image/x-icon image/gif image/jpeg application/xml+rss text/javascript application/atom+xml; ignore_invalid_headers on; client_header_timeout 3m; client_body_timeout 3m; send_timeout 3m; reset_timedout_connection on; connection_pool_size 256; client_header_buffer_size 256k; large_client_header_buffers 4 256k; client_max_body_size 200M; client_body_buffer_size 128k; request_pool_size 32k; output_buffers 4 32k; postpone_output 1460; proxy_temp_path /tmp/nginx_proxy/; client_body_in_file_only on; log_format bytes_log "$msec $bytes_sent ."; include "/etc/nginx/vhosts/*"; } vhost file: server { error_log /var/log/nginx/vhost-error_log warn; listen 194.145.208.19:80; server_name ipxnow.in www.ipxnow.in; access_log /usr/local/apache/domlogs/ipxnow.in-bytes_log bytes_log; access_log /usr/local/apache/domlogs/ipxnow.in combined; root /home/ipxnowin/public_html; location / { location ~.*\.(3gp|gif|jpg|jpeg|png|ico|wmv|avi|asf|asx|mpg|mpeg|mp4|pls|mp3|mid|wav|swf|flv|html|htm|txt|js|css|exe|zip|tar|rar|gz|tgz|bz2|uha|7z|doc|docx|xls|xlsx|pdf|iso)$ { expires 7d; try_files $uri @backend; } error_page 405 = @backend; add_header X-Cache "HIT from Backend"; proxy_pass http://194.145.208.19:8081; include proxy.inc; } location @backend { internal; proxy_pass http://194.145.208.19:8081; include proxy.inc; } location ~ .*\.(php|jsp|cgi|pl|py)?$ { proxy_pass http://194.145.208.19:8081; include proxy.inc; } location ~ /\.ht { deny all; } } and proxy.inc: proxy_connect_timeout 59s; proxy_send_timeout 600; proxy_read_timeout 600; proxy_buffer_size 64k; proxy_buffers 16 32k; proxy_busy_buffers_size 64k; proxy_temp_file_write_size 64k; proxy_pass_header Set-Cookie; proxy_redirect off; proxy_hide_header Vary; proxy_set_header Accept-Encoding ''; proxy_ignore_headers Cache-Control Expires; proxy_set_header Referer $http_referer; proxy_set_header Host $host; proxy_set_header Cookie $http_cookie; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-Host $host; proxy_set_header X-Forwarded-Server $host; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

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• Indentation-based Folding for TextMate

  - by Craig Walker

  SASS and HAML have indentation-based syntax, much like Python. Blocks of related code have the same number of spaces at the start of a line. Here's some example code: #drawer height: 100% color: #c2c7c4 font: size: 10px .slider overflow: hidden height: 100% .edge background: url('/images/foo') repeat-y .tab margin-top = !drawer_top width: 56px height: 161px display: block I'm using phuibonhoa's SASS bundle, and I'd like to enhance it so that the various sections can fold. For instance, I'd like to fold everything under #drawer, everything under .slider, everything under .edge, etc. The bundle currently includes the following folding code: foldingStartMarker = '/\*|^#|^\*|^\b|^\.'; foldingStopMarker = '\*/|^\s*$'; How can I enhance this to fold similarly-indented blocks?

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• BSOD when playing Portal 2 using ATI Radeon 4800 on H61M/U3S3 mobo

  - by Ben Walker

  playing Portal 2 will always give me blue screen of death, usually after about 10 minutes of playing. BSOD references atikmpag.sys. I have tried several updates for graphics driver and through ATI Catalyst Center. I have updated the motherboard BIOS. My RAM is OK. Nothing changes. I had previously run the game fine, then I removed my video card to use on-board graphics once, and after re-installing the video card, I get this problem every time. I am using: ATI Radeon 4800 ASRockH61M/U3S3 motherboard Windows 7 64-bit

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• Nginx reverse proxy IP issue

  - by Tiffany Walker

  For some reason Apache is still seeing my SERVERS ip. Is this an nginx problem? /etc/nginx.conf user nobody; # no need for more workers in the proxy mode worker_processes 4; error_log /var/log/nginx/error.log info; worker_rlimit_nofile 20480; events { worker_connections 5120; # increase for busier servers use epoll; # you should use epoll here for Linux kernels 2.6.x } http { server_name_in_redirect off; server_names_hash_max_size 10240; server_names_hash_bucket_size 1024; include mime.types; default_type application/octet-stream; server_tokens off; disable_symlinks if_not_owner; sendfile on; tcp_nopush on; tcp_nodelay on; keepalive_timeout 5; gzip on; gzip_vary on; gzip_disable "MSIE [1-6]\."; gzip_proxied any; gzip_http_version 1.1; gzip_min_length 1000; gzip_comp_level 6; gzip_buffers 16 8k; # You can remove image/png image/x-icon image/gif image/jpeg if you have slow CPU gzip_types text/plain text/xml text/css application/x-javascript application/xml image/png image/x-icon image/gif image/jpeg application/xml+rss text/javascript application/atom+xml; ignore_invalid_headers on; client_header_timeout 3m; client_body_timeout 3m; send_timeout 3m; reset_timedout_connection on; connection_pool_size 256; client_header_buffer_size 256k; large_client_header_buffers 4 256k; client_max_body_size 200M; client_body_buffer_size 128k; request_pool_size 32k; output_buffers 4 32k; postpone_output 1460; proxy_temp_path /tmp/nginx_proxy/; client_body_in_file_only on; log_format bytes_log "$msec $bytes_sent ."; include "/etc/nginx/vhosts/*"; } proxy.inc proxy_connect_timeout 59s; proxy_send_timeout 600; proxy_read_timeout 600; proxy_buffer_size 64k; proxy_buffers 16 32k; proxy_busy_buffers_size 64k; proxy_temp_file_write_size 64k; proxy_pass_header Set-Cookie; proxy_redirect off; proxy_hide_header Vary; proxy_set_header Accept-Encoding ''; proxy_ignore_headers Cache-Control Expires; proxy_set_header Referer $http_referer; proxy_set_header Host $host; proxy_set_header Cookie $http_cookie; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-Host $host; proxy_set_header X-Forwarded-Server $host; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; vhost file: server { error_log /var/log/nginx/vhost-error_log warn; listen 63.6.1.12:80; server_name photo-rolldomain.com www.domain.com; access_log /usr/local/apache/domlogs/domain.com-bytes_log bytes_log; access_log /usr/local/apache/domlogs/domain.com combined; root /home/mtech/public_html; location / { location ~.*\.(3gp|gif|jpg|jpeg|png|ico|wmv|avi|asf|asx|mpg|mpeg|mp4|pls|mp3|mid|wav|swf|flv|html|htm|txt|js|css|exe|zip|tar|rar|gz|tgz|bz2|uha|7z|doc|docx|xls|xlsx|pdf|iso)$ { expires 7d; try_files $uri @backend; } error_page 405 = @backend; add_header X-Cache "HIT from Backend"; proxy_pass http://63.6.1.12:8081; include proxy.inc; } location @backend { internal; proxy_pass http://63.6.1.12:8081; include proxy.inc; } location ~ .*\.(php|jsp|cgi|pl|py)?$ { proxy_pass http://63.6.1.12:8081; include proxy.inc; } location ~ /\.ht { deny all; } }

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• TCPDump and IPTables DROP by string

  - by Tiffany Walker

  by using tcpdump -nlASX -s 0 -vvv port 80 I get something like: 14:58:55.121160 IP (tos 0x0, ttl 64, id 49764, offset 0, flags [DF], proto TCP (6), length 1480) 206.72.206.58.http > 2.187.196.7.4624: Flags [.], cksum 0x6900 (incorrect -> 0xcd18), seq 1672149449:1672150889, ack 4202197968, win 15340, length 1440 0x0000: 4500 05c8 c264 4000 4006 0f86 ce48 ce3a E....d@[email protected].: 0x0010: 02bb c407 0050 1210 63aa f9c9 fa78 73d0 .....P..c....xs. 0x0020: 5010 3bec 6900 0000 0f29 95cc fac4 2854 P.;.i....)....(T 0x0030: c0e7 3384 e89a 74fa 8d8c a069 f93f fc40 ..3...t....i.?.@ 0x0040: 1561 af61 1cf3 0d9c 3460 aa23 0b54 aac0 .a.a....4`.#.T.. 0x0050: 5090 ced1 b7bf 8857 c476 e1c0 8814 81ed P......W.v...... 0x0060: 9e85 87e8 d693 b637 bd3a 56ef c5fa 77e8 .......7.:V...w. 0x0070: 3035 743a 283e 89c7 ced8 c7c1 cff9 6ca3 05t:(>........l. 0x0080: 5f3f 0162 ebf1 419e c410 7180 7cd0 29e1 _?.b..A...q.|.). 0x0090: fec9 c708 0f01 9b2f a96b 20fe b95a 31cf ......./.k...Z1. 0x00a0: 8166 3612 bac9 4e8d 7087 4974 0063 1270 .f6...N.p.It.c.p What do I pull to use IPTables to block via string. Or is there a better way to block attacks that have something in common? Question is: Can I pick any piece from that IP packet and call it a string? iptables -A INPUT -m string --alog bm --string attack_string -j DROP In other words: In some cases I can ban with TTL=xxx and use that should an attack have the same TTL. Sure it will block some legit packets but if it means keeping the box up it works till the attack goes away but I would like to LEARN how to FIND other common things in a packet to block with IPTables

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