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• ?????3:????“??”

  - by Todd Bao

  ?????SQL???????... =D select c from(select * from(select 'oracle' cc, level no from dual connect by level <= length('oracle'))model return updated rowsdimension by (no)measures (cc c, no n)rules (   c[any] = substr(c[cv()],n[cv()],1)))/ ????itpub?????????oracle????????,???????,?????????“???”,????????????????????????????????????=D ??? Todd ????:http://www.itpub.net/forum.php?mod=viewthread&action=printable&tid=1253982 Todd

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• Mod Rewrite Help - Pseudo-Subdirectories

  - by Gimpyfuzznut

  I am dealing with a frustrating problem with Joomla that is going to require some url trickery. The idea is straight-forward but after reading a bunch of guides for mod-rewrite, I still can't seem to get it work. Let's say my site is www.mysite.com. Joomla is already performing some rewriting for SEF urls so I have links like www.mysite.com/home and www.mysite.com/news and so on. I want to be able to have (4) pseudo-subdirectories like www.mysite.com/mode1/ and www.mysite.com/mode2/ and so on. These subdirectories should work as if the subdirectory isn't there, ie both www.mysite.com/mode1/home and www.mysite.com/mode2/home should pull up the same www.mysite.com/home. It should point any www.mysite.com/mode1/anypagehere to www.mysite.com/anypagehere. The reason I am asking for this is because I will be reading the url for mode1, mode2, etc, to modify the template page. There will be a landing page that will direct people to /mode1/ and /mode2/ etc and the template will change based on that. Note, that I don't want to actually pass a parameter to the url accessible by a GET or whatever because Joomla removes it (perhaps because of my current mod_rewrite settings). I've pasted the current .htaccess file. RewriteBase /joomla ##########Rewrite rules to block out some common exploits RewriteCond %{QUERY_STRING} mosConfig_[a-zA-Z_]{1,21}(=|\%3D) [OR] # Block out any script trying to base64_encode crap to send via URL RewriteCond %{QUERY_STRING} base64_encode.*\(.*\) [OR] # Block out any script that includes a <script> tag in URL RewriteCond %{QUERY_STRING} (\<|%3C).*script.*(\>|%3E) [NC,OR] # Block out any script trying to set a PHP GLOBALS variable via URL RewriteCond %{QUERY_STRING} GLOBALS(=|\[|\%[0-9A-Z]{0,2}) [OR] # Block out any script trying to modify a _REQUEST variable via URL RewriteCond %{QUERY_STRING} _REQUEST(=|\[|\%[0-9A-Z]{0,2}) # Send all blocked request to homepage with 403 Forbidden error! RewriteRule ^(.*)$ index.php [F,L] ########## Begin - Joomla! core SEF Section RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteCond %{REQUEST_URI} !^/index.php RewriteCond %{REQUEST_URI} (/|\.php|\.html|\.htm|\.feed|\.pdf|\.raw|/[^.]*)$ [NC] RewriteRule (.*) index.php #RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization},L] ########## End - Joomla! core SEF Section

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• System Expandable-String Environment Variables Can’t Reference User Environment Variables

  - by Synetech inc.

  Hi, I’ve run into a bit of a situation with Windows environment variables. I’ve narrowed it down to what may or may not makes sense and/or possibly be by design. It seems that expandable-string environment variables of the local machine cannot reference environment variables of the current user. For example if you’ve got the following environment variables: [HKCU\Environment] "CU"="CU" "CU->LM"="%LM%" [HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Environment] "LM"="LM" "LM->CU"="%CU%" Then you get the following results: > set CU CU=CU CU->LM=LM > set LM LM=LM LM->CU=%CU% It seems that user variables can expand system variable references, but system variables cannot expand (access?) user variable references. I suppose that it makes sense if you think about it just right (eg like how user vars override/hide system vars of the same name), but it also doesn’t make sense if you think about it in even more ways. So what’s going on? Is there a way to get this to work as expected? Thanks.

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• blu-ray archiving in vmware ESXi 4

  - by spacecadet77

  Hi, I need some advice about using blu-ray writer for archiving data on vmware ESXi 4. At office we have IBM System x3400 Tower server with ESXi 4 hipervisor and OpenSuse and CentOS GNU/Linux system as guests. Will blu-ray writer work in this setup, and if it will is there any particular model you can suggest. Best regards IBM System x3400 Tower server specification: 1x Intel Quad-Core Xeon E5410 2.33GHz/ 12MB/ 1333MHz (2x CPU max) Intel 5000P chipset, 2x 1GB PC2-5300 DDR2 667MHz SDRAM ECC Chipkill (32GB max) 2x4GB (2x2GB) PC2-5300 CL5 ECC DDR2 FBDIMM (x3400, x3550, x3650) SAS/SATA Hot-Swap Open Bay (0xHDD std, 4xHDD max, 8xHDD optional) ServeRAID 8K dual channel SAS/SATA controller (RAID 0,1,1E,10,5,6, 256MB, Battery Backup) Graphics ATI® RN50(ES1000) 16MB DDR, CD-RW/DVD Combo no FDD GigaEthernet, Tower with Power Supply 835W (opt Redudant) Slot 1: half-length, PCI-Express x8(x4 electrical) Slot 2: full, PCI-Express x8 Slot 3: full, PCI-Express x8 Slot 4: full, 64-bit 133MHz 3.3v PCI-X Slot 5: full, 64-bit 133MHz 3.3v PCI-X , Slot 6: half-length, 32-bit 33MHz 5.0v PCI ports: 4x USB (Vers 2.0), 2x PS/2, parallel, 2x serial (9-pin), VGA, RJ-45 (ethernet ), RJ-45 (sys mgm) HDD 4 x TB 7200rpm / Serial ATA II 3.0Gb/s / 16MB, RoHS

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• SuperMicro BMC on OpenSuSE Linux --cannot access from LAN

  - by Kendall

  Hi, I have an (old) SMC-001 IPMI device on an (old) X6DVL-EG2 motherboard. My problem is that I cannot access the BMC from LAN. I'm also getting some interesting output from ipmitool. First, the setup. I enable Console Redirection in the BIOS, turn BIOS Redirection after POSt to "disabled". I then modprobe'ed for ipmi_msghandler, ipmi_devintf and ipmi_si. I then found ipmi0 under /dev. So far so good. Since I want console redirection over serial, I modified /boot/grub/menu.lst: http://pastebin.com/YYJmhusQ I then modified "/etc/inittab" as follows: S1:12345:respawn:/sbin/agetty -L 19200 ttyS1 ansi Networking I set as following, using "ipmitool" ipaddr: 192.168.3.164 netmask: 255.255.255.0 defgw: 192.168.3.1 The above are correct for my environment. To test it I do: ipmitool -I open chassis power off which responds by powering off the machine. When I to access from another computer on the network, however, I get an error message: host# ipmitool -I lanplus -H 192.168.10.164 -U Admin -a chassis power status Error: Unable to establish LAN session Unable to get Chassis Power Status "Admin" seems to be a valid user name: host# ipmitool -I open user list 1 2 Admin true false true USER The interesting output from ipmitool I initially mentioned: host # ipmitool -I open lan set 1 access on Set Channel Access for channel 1 failed: Request data field length limit exceeded Also, newload4:/home/gjones # ipmitool channel info 1 Channel 0x1 info: Channel Medium Type : 802.3 LAN Channel Protocol Type : IPMB-1.0 Session Support : session-less Active Session Count : 0 Protocol Vendor ID : 7154 Get Channel Access (volatile) failed: Request data field length limit exceeded The output of "ipmitool -I open lan print 1" is here: http://pastebin.com/UZyL6yyE Any help/suggestions is greatly appreciated; I've been working with this thing for a few hours now with no success.

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• Apache2 - mod_rewrite : RequestHeader and environment variables

  - by Guillaume

  I try to get the value of the request parameter "authorization" and to store it in the header "Authorization" of the request. The first rewrite rule works fine. In the second rewrite rule the value of $2 does not seem to be stored in the environement variable. As a consequence the request header "Authorization" is empty. Any idea ? Thanks. <VirtualHost *:8010> RewriteLog "/var/apache2/logs/rewrite.log" RewriteLogLevel 9 RewriteEngine On RewriteRule ^/(.*)&authorization=@(.*)@(.*) http://<ip>:<port>/$1&authorization=@$2@$3 [L,P] RewriteRule ^/(.*)&authorization=@(.*)@(.*) - [E=AUTHORIZATION:$2,NE] RequestHeader add "Authorization" "%{AUTHORIZATION}e" </VirtualHost> I need to handle several cases because sometimes parameters are in the path and sometines they are in the query. Depending on the user. This last case fails. The header value for AUTHORIZATION looks empty. # if the query string includes the authorization parameter RewriteCond %{QUERY_STRING} ^(.*)authorization=@(.*)@(.*)$ # keep the value of the parameter in the AUTHORIZATION variable and redirect RewriteRule ^/(.*) http://<ip>:<port>/ [E=AUTHORIZATION:%2,NE,L,P] # add the value of AUTHORIZATION in the header RequestHeader add "Authorization" "%{AUTHORIZATION}e"

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• CORS Fails on CloudFront Distribution with Nginx Origin

  - by kgrote

  I have a CloudFront distribution set up with an Nginx server as the origin (a Media Temple DV server, to be specific). I enabled the Access-Control-Allow-Origin: * header so fonts will work in Firefox. However, Firefox throws a CORS error for fonts loaded from this CloudFront/Nginx distribution. I created another CloudFront distribution, this time with an Apache server as the origin, and set Access-Control-Allow-Origin: * also. Firefox displays fonts from this origin without issue. I've set up a demo page here: http://kristengrote.com/cors-test/ When I perform a curl request for the same font file from each distribution, both files return almost exactly the same headers: Apache Origin Nginx Origin ——————————————————— ——————————————————— HTTP/1.1 200 OK HTTP/1.1 200 OK Server: Apache Server: nginx Content-Type: application/font-woff Content-Type: application/font-woff Content-Length: 25428 Content-Length: 25428 Connection: keep-alive Connection: keep-alive Date: Wed, 11 Jun 2014 23:23:09 GMT Date: Wed, 11 Jun 2014 23:15:23 GMT Last-Modified: Tue, 10 Jun 2014 22:15:56 GMT Last-Modified: Tue, 10 Jun 2014 22:56:09 GMT Accept-Ranges: bytes Accept-Ranges: bytes Cache-Control: max-age=2592000 Cache-Control: max-age=2592000 Expires: Fri, 11 Jul 2014 23:23:09 GMT Expires: Fri, 11 Jul 2014 23:15:23 GMT Access-Control-Allow-Origin: * Access-Control-Allow-Origin: * Access-Control-Allow-Methods: GET, HEAD Access-Control-Allow-Methods: GET, HEAD Access-Control-Allow-Headers: * Access-Control-Allow-Headers: * Access-Control-Max-Age: 3000 Access-Control-Max-Age: 3000 X-Cache: Hit from cloudfront X-Cache: Hit from cloudfront Via: 1.1 210111ffb8239a13be669aa7c59f53bd.cloudfront.net (CloudFront) Via: 1.1 fa0dd57deefe7337151830e7e9660414.cloudfront.net (CloudFront) X-Amz-Cf-Id: QWucpBoZnS3B8E1mlXR2V5V-SVUoITCeVb64fETuAgNuGuTLnbzAhw== X-Amz-Cf-Id: E2Z3VOIfR5QPcYN1osOgvk0HyBwc3PxrFBBHYdA65ZntXDe-srzgUQ== Age: 487 X-Accel-Version: 0.01 X-Powered-By: PleskLin X-Robots-Tag: noindex, nofollow So the only conclusion I can draw is that something about Nginx is preventing Firefox from recognizing CORS and allowing the fonts via CloudFront. Any ideas on what the heck is happening here?

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• need help with automating a CMD java tool whcih qurries alexa AWS using batch

  - by Eli.C

  Hi everyone, I need to get all available info on 600 URLs from "Alexa Web Information Service", I downloaded the java tool and I'm able to run a single query each time with a single switch/Response Group. I would like to ask how to write a batch file that would automate the process ? the java tool runs from the CMD with the following: C:java UrlInfo (key1) (key2) (URL) (Response Group) UrlInfo - constant key1 - constant key2 -constant URL - variable (I guess I need to use the "(" sign to read from a file) Response Group - variable - (14 total, and I need to run each Response Group on each of the URLs once ) the app returns data in clear text formatted as XML after each query, here is an example: C:java UrlInfo (key1) (key2) www.url.com Rank Response: (?xml version="1.0"?) (aws:UrlInfoResponse xmlns:aws="http://alexa.amazonaws.com/doc/2005-10-05/") (aws:Response xmlns:aws="http://awis.amazonaws.com/doc/2005-07-11") (aws:OperationRequest) (aws:RequestId)ec2b6-e8ae-b392(/aws:RequestId) (/aws:OperationRequest) (aws:UrlInfoResult) (aws:Alexa) (aws:TrafficData) (aws:DataUrl type="canonical")url.com/(/aws:DataUrl) (aws:Rank)472906(/aws:Rank) (/aws:TrafficData) (/aws:Alexa) (/aws:UrlInfoResult) (aws:ResponseStatus xmlns:aws="http://alexa.amazonaws.com/doc/2005-10-05/") (aws:StatusCode)Success(/aws:StatusCode) (/aws:ResponseStatus) (/aws:Response) (/aws:UrlInfoResponse) Any help would be really appreciated Thanks and regards Eli.C

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• How to remotely open gedit with SFTP URL in Gnome through SSH?

  - by Álvaro Justen

  My setup is weird and I can't change it now. I have two machines: local-machine: it's my desktop running Ubuntu with Gnome remote-machine: it's one virtual machine, also running Ubuntu but without X In both machines I have my private and public SSH keys. I need to run SSH from remote-machine to local-machine and run gedit (in local-machine, under the default $DISPLAY) but openning a file in remote-machine throught SFTP. Something like this: myuser@remote-machine:~$ ssh local-machine "DISPLAY=:0.0 gedit sftp://remote-machine/some/file" The command above doesn't work. gedit shows this message: Could not open the file sftp://remote-machine/some/file. gedit cannot handle sftp: locations. Note that: /some/file exists on remote-machine. I can SSH normally from remote-machine to local-machine using my SSH key without any problems! I can run the command DISPLAY=:0.0 gedit sftp://remote-machine/some/file in a terminal on local-machine and gedit opens the file on remote-machine without any problems - but the terminal in which I executed the command is running in DISPLAY :0 (really, it's gnome-terminal). I also tried -t option of SSH client (to force pseudo-tty allocation) but it didn't work. If I try to run DISPLAY=:0.0 gedit sftp://remote-machine/some/file in local-machine but under a tty (for example in tty1, by pressing <Ctrl>+<Alt>+<F1>) it doesn't not work - I get the same error when running from remote-machine. I found that if I pass the environment variable DBUS_SESSION_BUS_ADDRESS with a correct value, it works! So, if I do something like that: myuser@local-machine:~$ env | grep DBUS_SESSION_BUS_ADDRESS > env.txt myuser@local-machine:~$ scp env.txt remote-machine: and then: myuser@remote-machine:~$ ssh local-machine "DISPLAY=:0.0 $(cat env.txt) gedit sftp://remote-machine/some/file" it works! The problem is that I'm not on local-machine so I can't get the correct value for this env variable. Is there any other way to make this work?

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• need help with automating a CMD java tool which queries alexa AWS using batch

  - by Eli.C

  Hi everyone, I need to get all available info on 600 URLs from "Alexa Web Information Service", I downloaded the java tool and I'm able to run a single query each time with a single switch/Response Group. I would like to ask how to write a batch file that would automate the process? The java tool runs from the CMD with the following: C:\>java UrlInfo (key1) (key2) (URL) (Response Group) UrlInfo - constant key1 - constant key2 -constant URL - variable (I guess I need to use the "(" sign to read from a file) Response Group - variable - (14 total, and I need to run each Response Group on each of the URLs once ) the app returns data in clear text formatted as XML after each query, here is an example: C:\>java UrlInfo (key1) (key2) www.url.com Rank Response: (?xml version="1.0"?) (aws:UrlInfoResponse xmlns:aws="http://alexa.amazonaws.com/doc/2005-10-05/") (aws:Response xmlns:aws="http://awis.amazonaws.com/doc/2005-07-11") (aws:OperationRequest) (aws:RequestId)ec2b6-e8ae-b392(/aws:RequestId) (/aws:OperationRequest) (aws:UrlInfoResult) (aws:Alexa) (aws:TrafficData) (aws:DataUrl type="canonical")url.com/(/aws:DataUrl) (aws:Rank)**472906**(/aws:Rank) (/aws:TrafficData) (/aws:Alexa) (/aws:UrlInfoResult) (aws:ResponseStatus xmlns:aws="http://alexa.amazonaws.com/doc/2005-10-05/") (aws:StatusCode)Success(/aws:StatusCode) (/aws:ResponseStatus) (/aws:Response) (/aws:UrlInfoResponse) Any help would be really appreciated Thanks and regards Eli.C

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• Apache2 - mod_rewrite : RequestHeader and environment variables

  - by Guillaume

  I try to get the value of the request parameter "authorization" and to store it in the header "Authorization" of the request. The first rewrite rule works fine. In the second rewrite rule the value of $2 does not seem to be stored in the environement variable. As a consequence the request header "Authorization" is empty. Any idea ? Thanks. <VirtualHost *:8010> RewriteLog "/var/apache2/logs/rewrite.log" RewriteLogLevel 9 RewriteEngine On RewriteRule ^/(.*)&authorization=@(.*)@(.*) http://<ip>:<port>/$1&authorization=@$2@$3 [L,P] RewriteRule ^/(.*)&authorization=@(.*)@(.*) - [E=AUTHORIZATION:$2,NE] RequestHeader add "Authorization" "%{AUTHORIZATION}e" </VirtualHost> I need to handle several cases because sometimes parameters are in the path and sometines they are in the query. Depending on the user. This last case fails. The header value for AUTHORIZATION looks empty. # if the query string includes the authorization parameter RewriteCond %{QUERY_STRING} ^(.*)authorization=@(.*)@(.*)$ # keep the value of the parameter in the AUTHORIZATION variable and redirect RewriteRule ^/(.*) http://<ip>:<port>/ [E=AUTHORIZATION:%2,NE,L,P] # add the value of AUTHORIZATION in the header RequestHeader add "Authorization" "%{AUTHORIZATION}e"

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• Linksys/Cisco Small Business SRW-Series (ie SRW248G4) - Overcoming the Limitations

  - by Warren P

  We just purchased a Cisco/Linksys SRW 248G4 switch to try it out. We have always had unmanaged switches before, and this is our first "somewhat managed" switch. So far the major limitations are: Only Internet Explorer 6 (manual says IE 5.5!) works for the web interface SSH exists but is not practically useable because the only key length that is supported is no longer even used by most modern SSH installs. (I get the error "RSA modulus too small" in openssh 4.x/5.x) This is with the latest firmware revision, I believe, although Cisco's website does not actually tell you what version you're downloading. All in all, I think, they must be trying to tell me that if I want a good-quality switch, I shouldn't buy these SRWs and should buy a Dell or an HP ProCurve, or save up my pennies, and buy a Catalyst. The question here, then, at long last: Has anyone gotten the web-browser to work via some IE 7 or IE 8 compatibility mode settings or used another browser (Opera? KDE/Safari/WebKit?) and spoofed IE6? Is there any way to get the SSH key length upgraded? I'm guessing a 0% chance of a yes on that last one. I found an XP machine, used telnet (via PuttyTel.exe) and IE6 to set this up, and I doubt we'll have to touch it again. Which is fine with us. But it would be nice if I could administer this thing from either (a) a linux box, or (b) my primary desktop which is windows 7. It looks like XPMode with IE6 on the virtual XP machine may be my only way to administer this type of switch via the web.

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• Freeradius authentication failed for unknown reason

  - by Moein7tl

  I followed this instruction to force freeradius to use mysql database. and run freeradius in debug mod. but it rejects all authentication. mysql database : mysql select * from radcheck; +----+----------+-----------+----+---------+ | id | username | attribute | op | value | +----+----------+-----------+----+---------+ | 1 | test | Password | == | test123 | | 2 | test | Auth-Type | == | Local | +----+----------+-----------+----+---------+ 2 rows in set (0.02 sec) radtest command : # radtest test test123 localhost 0 testing123 Sending Access-Request of id 235 to 127.0.0.1 port 1812 User-Name = "test" User-Password = "test123" NAS-IP-Address = 127.0.0.1 NAS-Port = 0 Message-Authenticator = 0x00000000000000000000000000000000 rad_recv: Access-Reject packet from host 127.0.0.1 port 1812, id=235, length=20 radiusd debug mod log: rad_recv: Access-Request packet from host 127.0.0.1 port 51034, id=235, length=74 User-Name = "test" User-Password = "test123" NAS-IP-Address = 127.0.0.1 NAS-Port = 0 Message-Authenticator = 0xbf111cbbae24fb0f0a558bfa26f53476 # Executing section authorize from file /usr/local/etc/raddb/sites-enabled/default +- entering group authorize {...} ++[preprocess] returns ok ++[chap] returns noop ++[mschap] returns noop ++[digest] returns noop [suffix] No '@' in User-Name = "test", looking up realm NULL [suffix] No such realm "NULL" ++[suffix] returns noop [eap] No EAP-Message, not doing EAP ++[eap] returns noop ++[files] returns noop ++[expiration] returns noop ++[logintime] returns noop [pap] WARNING! No "known good" password found for the user. Authentication may fail because of this. ++[pap] returns noop ERROR: No authenticate method (Auth-Type) found for the request: Rejecting the user Failed to authenticate the user. Using Post-Auth-Type Reject # Executing group from file /usr/local/etc/raddb/sites-enabled/default +- entering group REJECT {...} [attr_filter.access_reject] expand: %{User-Name} - test attr_filter: Matched entry DEFAULT at line 11 ++[attr_filter.access_reject] returns updated Delaying reject of request 20 for 1 seconds Going to the next request Waking up in 0.9 seconds. Sending delayed reject for request 20 Sending Access-Reject of id 235 to 127.0.0.1 port 51034 Waking up in 4.9 seconds. Cleaning up request 20 ID 235 with timestamp +4325 Ready to process requests. where is the problem and how should I solve it?

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• missing network usage through iptables

  - by Purres

  I inserted a rule to iptables to track the input usage to a certain ip address. The vps server's IP is 192.168.1.5 and the guest os's IP is 192.168.1.115. I ran 'yum update' inside the guest OS to get some network traffic. Then I ran iptables -vnL from the hypervisor. However it only showed network usage to the host, but not to the guest. Chain INPUT (policy ACCEPT 0 packets, 0 bytes) pkts bytes target source destination 0 0 0.0.0.0/0 0.0.0.0/0 destination IP range 192.168.1.115-192.168.1.115 1853 114K 0.0.0.0/0 0.0.0.0/0 destination IP range 192.168.1.5-192.168.1.5 I ran tcpdump and the log showed that there're data packets to the guest os. 16:17:43.932514 IP mirrordenver.fdcservers.net.http > 192.168.1.115.34471: Flags [.], seq 17694667:17696115, ack 1345, win 113, options [nop,nop,TS val 1060308643 ecr 1958781], length 1448 16:17:43.932559 IP 192.168.1.115.34471 > mirrordenver.fdcservers.net.http: Flags [.], ack 17696115, win 15287, options [nop,nop,TS val 1958869 ecr 1060308643], length 0 Why the guest OS network usage couldn't be tracked? iptables -L will return the INPUT chain as following: Chain INPUT (policy ACCEPT) target prot opt source destination all -- anywhere anywhere destination IP range 192.168.1.115-192.168.1.115 all -- anywhere anywhere destination IP range 192.168.1.5-192.168.1.5 all -- anywhere anywhere

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• ssh X11 forwarding issue

  - by bbuser

  I have put ForwardX11 in my ~/.ssh/config and then I start a X11 application like this: ssh -f user@host 'someapp; sleep 1' This works fine. The application someapp has a button which opens a viewer application via a shell script viewer.sh. When I press the button the viewer comes up. This is all good and as expected, but if I do ssh -2 -f user@host 'someapp; sleep 1' there's trouble. someapp starts very well, but if I click the button the viewer doesn't show up. As the viewer is called via a shell script, I replaced the call with xclock and the situation was exactly the same - I think the viewer is not to blame. The situation is the same on Linux and AIX. The reason I need -2 is that I finally want to use connection multiplexing and this does only work with version 2. The reason for the sleep 1 is that it didn't work otherwise;-) To add more confusion, with ssh -2 -f user@host 'xterm &; app; sleep 1' the viewer works as long as the xterm is open. When I close xterm ssh -v outputs the following debug1: channel 1: FORCE input drain debug1: channel 0: free: client-session, nchannels 3 debug1: channel 1: free: x11, nchannels 2 and from that moment the viewer doesn't show when I press the button. I also replaced the viewer application with a script that writes the $DISPLAY variable to a file. The variable is always set correctly.

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• Change the default program for a filetype to something not in "Program Files" in Windows Vista

  - by Carson Myers

  I'm trying to make my python scripts run in python 2.6 by default when run from the command line. This is paired with adding certain scripts to the PATH variable and .py to PATHEXT for convenience. But I'll be damned if I can get the file type association to work. In the default programs dialog (found in control panel) I find .py, and click "Change Program." This gives me the same dialog as clicking "Open with..." on a file's context menu. I search for python. Tell it to use python, but it doesn't add it to the list of programs I am allowed to use. I tried making a shortcut to python in Program Files, but that won't work either. If I copy python into a folder in Program Files, then that works. But why can't I just point it at C:\python26\python.exe (which is in the PATH variable) in the first place? Is there a way around this, or do I have to just reinstall python into Program Files?

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• Send mail on event log error trigger safe check frequency

  - by Zeb Rawnsley

  I want to use powershell to alert me when an error occurs in the event viewer on my new Win2k12 Standard Server, I was thinking I could have the script execute every 10mins but don't want to put any strain on the server just for event log checking, here is the powershell script I want to use: $SystemErrors = Get-EventLog System | Where-Object { $_.EntryType -eq "Error" } If ($SystemErrors.Length -gt 0) { Send-MailMessage -To "[email protected]" -From $env:COMPUTERNAME + @company.co.nz" -Subject $env:COMPUTERNAME + " System Errors" -SmtpServer "smtp.company.co.nz" -Priority High } What is a safe frequency I can run this script at without hurting my server? Hardware: Intel Xeon E5410 @ 2.33GHz x2 32GB RAM 3x 7200RPM S-ATA 1TB (2x RAID1) Edit: With the help of Mathias R. Jessen's answer, I ended up attaching an event to the application & system log with the following script: Param( [string]$LogName ) $ComputerName = $env:COMPUTERNAME; $To = "[email protected]" $From = $ComputerName + "@company.co.nz"; $Subject = $ComputerName + " " + $LogName + " Error"; $SmtpServer = "smtp.company.co.nz"; $AppErrorEvent = Get-EventLog $LogName -Newest 1 | Where-Object { $_.EntryType -eq "Error" }; If ($AppErrorEvent.Length -eq 1) { $AppErrorEventString = $AppErrorEvent | Format-List | Out-String; Send-MailMessage -To $To -From $From -Subject $Subject -Body $AppErrorEventString -SmtpServer $SmtpServer -Priority High; };

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• Inbound SIP calls through Cisco 881 NAT hang up after a few seconds

  - by MasterRoot24

  I've recently moved to a Cisco 881 router for my WAN link. I was previously using a Cisco Linksys WAG320N as my modem/router/WiFi AP/NAT firewall. The WAG320N is now running in bridged mode, so it's simply acting as a modem with one of it's LAN ports connected to FE4 WAN on my Cisco 881. The Cisco 881 get's a DHCP provided IP from my ISP. My LAN is part of default Vlan 1 (192.168.1.0/24). General internet connectivity is working great, I've managed to setup static NAT rules for my HTTP/HTTPS/SMTP/etc. services which are running on my LAN. I don't know whether it's worth mentioning that I've opted to use NVI NAT (ip nat enable as opposed to the traditional ip nat outside/ip nat inside) setup. My reason for this is that NVI allows NAT loopback from my LAN to the WAN IP and back in to the necessary server on the LAN. I run an Asterisk 1.8 PBX on my LAN, which connects to a SIP provider on the internet. Both inbound and outbound calls through the old setup (WAG320N providing routing/NAT) worked fine. However, since moving to the Cisco 881, inbound calls drop after around 10 seconds, whereas outbound calls work fine. The following message is logged on my Asterisk PBX: [Dec 9 15:27:45] WARNING[27734]: chan_sip.c:3641 retrans_pkt: Retransmission timeout reached on transmission [email protected] for seqno 1 (Critical Response) -- See https://wiki.asterisk.org/wiki/display/AST/SIP+Retransmissions Packet timed out after 6528ms with no response [Dec 9 15:27:45] WARNING[27734]: chan_sip.c:3670 retrans_pkt: Hanging up call [email protected] - no reply to our critical packet (see https://wiki.asterisk.org/wiki/display/AST/SIP+Retransmissions). (I know that this is quite a common issue - I've spend the best part of 2 days solid on this, trawling Google.) I've done as I am told and checked https://wiki.asterisk.org/wiki/display/AST/SIP+Retransmissions. Referring to the section "Other SIP requests" in the page linked above, I believe that the hangup to be caused by the ACK from my SIP provider not being passed back through NAT to Asterisk on my PBX. I tried to ascertain this by dumping the packets on my WAN interface on the 881. I managed to obtain a PCAP dump of packets in/out of my WAN interface. Here's an example of an ACK being reveived by the router from my provider: 689 21.219999 193.x.x.x 188.x.x.x SIP 502 Request: ACK sip:[email protected] | However a SIP trace on the Asterisk server show's that there are no ACK's received in response to the 200 OK from my PBX: http://pastebin.com/wwHpLPPz In the past, I have been strongly advised to disable any sort of SIP ALGs on routers and/or firewalls and the many posts regarding this issue on the internet seem to support this. However, I believe on Cisco IOS, the config command to disable SIP ALG is no ip nat service sip udp port 5060 however, this doesn't appear to help the situation. To confirm that config setting is set: Router1#show running-config | include sip no ip nat service sip udp port 5060 Another interesting twist: for a short period of time, I tried another provider. Luckily, my trial account with them is still available, so I reverted my Asterisk config back to the revision before I integrated with my current provider. I then dialled in to the DDI associated with the trial trunk and the call didn't get hung up and I didn't get the error above! To me, this points at the provider, however I know, like all providers do, will say "There's no issues with our SIP proxies - it's your firewall." I'm tempted to agree with this, as this issue was not apparent with the old WAG320N router when it was doing the NAT'ing. I'm sure you'll want to see my running-config too: ! ! Last configuration change at 15:55:07 UTC Sun Dec 9 2012 by xxx version 15.2 no service pad service tcp-keepalives-in service tcp-keepalives-out service timestamps debug datetime msec localtime show-timezone service timestamps log datetime msec localtime show-timezone no service password-encryption service sequence-numbers ! hostname Router1 ! boot-start-marker boot-end-marker ! ! security authentication failure rate 10 log security passwords min-length 6 logging buffered 4096 logging console critical enable secret 4 xxx ! aaa new-model ! ! aaa authentication login local_auth local ! ! ! ! ! aaa session-id common ! memory-size iomem 10 ! crypto pki trustpoint TP-self-signed-xxx enrollment selfsigned subject-name cn=IOS-Self-Signed-Certificate-xxx revocation-check none rsakeypair TP-self-signed-xxx ! ! crypto pki certificate chain TP-self-signed-xxx certificate self-signed 01 quit no ip source-route no ip gratuitous-arps ip auth-proxy max-login-attempts 5 ip admission max-login-attempts 5 ! ! ! ! ! no ip bootp server ip domain name dmz.merlin.local ip domain list dmz.merlin.local ip domain list merlin.local ip name-server x.x.x.x ip inspect audit-trail ip inspect udp idle-time 1800 ip inspect dns-timeout 7 ip inspect tcp idle-time 14400 ip inspect name autosec_inspect ftp timeout 3600 ip inspect name autosec_inspect http timeout 3600 ip inspect name autosec_inspect rcmd timeout 3600 ip inspect name autosec_inspect realaudio timeout 3600 ip inspect name autosec_inspect smtp timeout 3600 ip inspect name autosec_inspect tftp timeout 30 ip inspect name autosec_inspect udp timeout 15 ip inspect name autosec_inspect tcp timeout 3600 ip cef login block-for 3 attempts 3 within 3 no ipv6 cef ! ! multilink bundle-name authenticated license udi pid CISCO881-SEC-K9 sn ! ! username xxx privilege 15 secret 4 xxx username xxx secret 4 xxx ! ! ! ! ! ip ssh time-out 60 ! ! ! ! ! ! ! ! ! interface FastEthernet0 no ip address ! interface FastEthernet1 no ip address ! interface FastEthernet2 no ip address ! interface FastEthernet3 switchport access vlan 2 no ip address ! interface FastEthernet4 ip address dhcp no ip redirects no ip unreachables no ip proxy-arp ip nat enable duplex auto speed auto ! interface Vlan1 ip address 192.168.1.1 255.255.255.0 no ip redirects no ip unreachables no ip proxy-arp ip nat enable ! interface Vlan2 ip address 192.168.0.2 255.255.255.0 ! ip forward-protocol nd ip http server ip http access-class 1 ip http authentication local ip http secure-server ip http timeout-policy idle 60 life 86400 requests 10000 ! ! no ip nat service sip udp port 5060 ip nat source list 1 interface FastEthernet4 overload ip nat source static tcp x.x.x.x 80 interface FastEthernet4 80 ip nat source static tcp x.x.x.x 443 interface FastEthernet4 443 ip nat source static tcp x.x.x.x 25 interface FastEthernet4 25 ip nat source static tcp x.x.x.x 587 interface FastEthernet4 587 ip nat source static tcp x.x.x.x 143 interface FastEthernet4 143 ip nat source static tcp x.x.x.x 993 interface FastEthernet4 993 ip nat source static tcp x.x.x.x 1723 interface FastEthernet4 1723 ! ! logging trap debugging logging facility local2 access-list 1 permit 192.168.1.0 0.0.0.255 access-list 1 permit 192.168.0.0 0.0.0.255 no cdp run ! ! ! ! control-plane ! ! banner motd Authorized Access only ! line con 0 login authentication local_auth length 0 transport output all line aux 0 exec-timeout 15 0 login authentication local_auth transport output all line vty 0 1 access-class 1 in logging synchronous login authentication local_auth length 0 transport preferred none transport input telnet transport output all line vty 2 4 access-class 1 in login authentication local_auth length 0 transport input ssh transport output all ! ! end ...and, if it's of any use, here's my Asterisk SIP config: [general] context=default ; Default context for calls allowoverlap=no ; Disable overlap dialing support. (Default is yes) udpbindaddr=0.0.0.0 ; IP address to bind UDP listen socket to (0.0.0.0 binds to all) ; Optionally add a port number, 192.168.1.1:5062 (default is port 5060) tcpenable=no ; Enable server for incoming TCP connections (default is no) tcpbindaddr=0.0.0.0 ; IP address for TCP server to bind to (0.0.0.0 binds to all interfaces) ; Optionally add a port number, 192.168.1.1:5062 (default is port 5060) srvlookup=yes ; Enable DNS SRV lookups on outbound calls ; Note: Asterisk only uses the first host ; in SRV records ; Disabling DNS SRV lookups disables the ; ability to place SIP calls based on domain ; names to some other SIP users on the Internet ; Specifying a port in a SIP peer definition or ; when dialing outbound calls will supress SRV ; lookups for that peer or call. directmedia=no ; Don't allow direct RTP media between extensions (doesn't work through NAT) externhost=<MY DYNDNS HOSTNAME> ; Our external hostname to resolve to IP and be used in NAT'ed packets localnet=192.168.1.0/24 ; Define our local network so we know which packets need NAT'ing qualify=yes ; Qualify peers by default dtmfmode=rfc2833 ; Set the default DTMF mode disallow=all ; Disallow all codecs by default allow=ulaw ; Allow G.711 u-law allow=alaw ; Allow G.711 a-law ; ---------------------- ; SIP Trunk Registration ; ---------------------- ; Orbtalk register => <MY SIP PROVIDER USER NAME>:[email protected]/<MY DDI> ; Main Orbtalk number ; ---------- ; Trunks ; ---------- [orbtalk] ; Main Orbtalk trunk type=peer insecure=invite host=sipgw3.orbtalk.co.uk nat=yes username=<MY SIP PROVIDER USER NAME> defaultuser=<MY SIP PROVIDER USER NAME> fromuser=<MY SIP PROVIDER USER NAME> secret=xxx context=inbound I really don't know where to go with this. If anyone can help me find out why these calls are being dropped off, I'd be grateful if you could chime in! Please let me know if any further info is required.

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• Environment variables in bash_profile or bashrc?

  - by Viriato

  I have found this question [blog]: Difference between .bashrc and .bash_profile very useful but after seeing the most voted answer (very good by the way) I have further questions. Towards the end of the most voted, correct answer I see the statement as follows : Note that you may see here and there recommendations to either put environment variable definitions in ~/.bashrc or always launch login shells in terminals. Both are bad ideas. Why is it a bad idea (I am not trying to fight, I just want to understand)? If I want to set an environment variable and add it to the PATH (for example JAVA_HOME) where it would be the best place to put the export entry? in ~/.bash_profile or ~/.bashrc? If the answer to question number 2 is ~/.bash_profile, then I have two further questions: 3.1. What would you put under ~/.bashrc? only aliases? 3.2. In a non-login shell, I believe the ~/.bash_profile is not being "picked up". If the export of JAVA_HOME entry was in bash_profile would I be able to execute javac & java commands? Would it find them on the PATH? Is that the reason why some posts and forums suggest setting JAVA_HOME and alike to ~/.bashrc? Thanks in advance.

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• copSSH and cygwin - Can't use windows style paths

  - by DrFredEdison

  I setup copSSH on one of my windows servers, and within the copSSH bash shell, I can't seem to use windows-style paths to remove and copy files. If I do try, I get the following: $ /bin/cp -r C:/Domains/_temp/collage_push/* C:/Domains/collage/ cygwin warning: MS-DOS style path detected: C:/Domains/_temp/collage_push/ Preferred POSIX equivalent is: /cygdrive/c/Domains/_temp/collage_push/ CYGWIN environment variable option "nodosfilewarning" turns off this warning. Consult the user's guide for more details about POSIX paths: http://cygwin.com/cygwin-ug-net/using.html#using-pathnames I have created a windows environment variable CYGWIN set to nodosfilewarning. It has no effect. I added export CYGWIN=nodosfilewarning to my .bashrc and doing a echo $CYGWIN in my ssh session confirms it is indeed getting set; yet again, it has no effect finally, I noted that when not doing my own export that CYGWIN contains "nontsec binmode" (no quotes), so I tried: export CYGWIN="nodosfilewarning nontsec binmode" in my .bashrc and still no dice. Older versions of CopSSH didn't have this issue. How can I actually override this error? I have a lot of scripts that already use windows-style paths, and I'd rather not change them if possible.

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• Accessing SSH_AUTH_SOCK from another non-root user

  - by Danny F

  The Scenario: I am running ssh-agent on my local PC, and all my servers/clients are setup to forward SSH agent auth. I can hop between all my machines using the ssh-agent on my local PC. That works. I need to be able to SSH to a machine as myself (user1), change to another user named user2 (sudo -i -u user2), and then ssh to another box using the ssh-agent I have running on my local PC. Lets say I want to do something like ssh user3@machine2 (assuming that user3 has my public SSH key in their authorized_keys file). I have sudo configured to keep the SSH_AUTH_SOCK environment variable. All users involved (user[1-3]), are non privileged users (not root). The Problem: When I change to another user, even though the SSH_AUTH_SOCK variable is set correctly, (lets say its set to: /tmp/ssh-HbKVFL7799/agent.13799) user2 does not have access to the socket that was created by user1 - Which of course makes sense, otherwise user2 could hijack user1's private key and hop around as that user. This scenario works just fine if instead of getting a shell via sudo for user2, I get a shell via sudo for root. Because naturally root has access to all the files on the machine. The question: Preferably using sudo, how can I change from user1 to user2, but still have access to user1's SSH_AUTH_SOCK?

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• Google Chrome - Issues with download dialogs using BinaryWrite

  - by Mila

  Hello, I have an empty ASP .NET page with the code behind to support downloading of PDF files. The page is called from a link-like web control that has NavigateUrl set to this page. In short, I am using the following for streaming: Response.Buffer = false; Response.ClearHeaders(); Response.ContentType = "application/x-pdf"; Response.AddHeader("Content-Disposition","attachment; filename="MyPDFFile.pdf"); byte[] binary = (dataReaderRemote[DataPDFFieldName]) as byte[]; //dataReaderRemote[DataPDFFieldName] has previously retrieved data if (binary != null) { MemoryStream memoryStream = new MemoryStream(binary); int sizeToWrite = CHUNKSIZE; //CHUNKSIZE=1024 for (int i = 0; i < binary.GetUpperBound(0) - 1; i = i + CHUNKSIZE) { if (!Response.IsClientConnected) return; if (i + CHUNKSIZE >= binary.Length) sizeToWrite = binary.Length - i; byte[] chunk = new byte[sizeToWrite]; memoryStream.Read(chunk, 0, sizeToWrite); Response.BinaryWrite(chunk); Response.Flush(); } } Response.Close(); IE as well as Firefox bring the download prompt window asking you whether you wish to open or save the file, while the user remains on the same page containing the link. However, Google Chrome opens a new blank tab and downloads the file automatically. Is there any way to prevent Chrome from opening the extra blank and therefore useless tab? I am using the Google Chrome version 5.0.375.55 (Official Build 47796) on Windows XP. Thanks in advance! Mila

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• Exporting Environment Variables in Ubuntu Linux

  - by stanigator

  I know many people have asked about environment variables before, but I am having a hard time dealing with these paths while ensuring I don't mess around with the original settings. How would you go about executing these commands in Ubuntu in terms of environment variables? Thanks in advance! Please put /home/stanley/Downloads/ns-allinone-2.34/bin:/home/stanley/Downloads/ns-allinone-2.34/tcl8.4.18/unix:/home/stanley/Downloads/ns-allinone-2.34/tk8.4.18/unix into your PATH environment; so that you'll be able to run itm/tclsh/wish/xgraph. IMPORTANT NOTICES: (1) You MUST put /home/stanley/Downloads/ns-allinone-2.34/otcl-1.13, /home/stanley/Downloads/ns-allinone-2.34/lib, into your LD_LIBRARY_PATH environment variable. If it complains about X libraries, add path to your X libraries into LD_LIBRARY_PATH. If you are using csh, you can set it like: setenv LD_LIBRARY_PATH If you are using sh, you can set it like: export LD_LIBRARY_PATH= (2) You MUST put /home/stanley/Downloads/ns-allinone-2.34/tcl8.4.18/library into your TCL_LIBRARY environmental variable. Otherwise ns/nam will complain during startup.

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• Odd behavior of setting REMOTE_ADDR between Apache, Nginx, and AWS ELB

  - by Chris Drumgoole

  I have encountered a strange issue and am curious if others have encountered this as well. and if there is absolutely anything that can be done.. We have a set up where we have multiple AWS EC2 Linux machines sitting behind a ELB. The EC2 machines are running Nginx. Let's refer to these as my production machines (because they are!) I also have a Rackspace cloud machine running apache. Completely separate. Let's call this the test server. Now, there's a ISP here in Singapore that seems to be funneling traffic through a transparent proxy or something, and when you do a IP check, the IP often changes. In fact, I noticed that when I check on http://www.whatismyip.com, the ip seems to be stable (doesn't change) across refreshes. But, http://www.whatismyipaddress.com, on refreshing, the IP changes! (so my ISP is doing weird stuff). Now, back to my set up, I noticed a couple of things: Checking the REMOTE_ADDR variable from PHP when connecting to a single Nginx production machine (bypassing the load balancer), is set to the stable IP that does change. Checking the REMOTE_ADDR variable from PHP when connecting to the test Apache server, it is set to the IP that does change on refreshes. Checking the headers when connecting to the nginx production machines through the ELB, the ELB sets the HTTP_X_FORWARDED_FOR to the stable IP. Has anyone experienced this odd behavior? Is there nothing that I can do? And which IP should I "trust"? (the one Apache gives, or the one ELB and Nginx gives?) Thanks! Chris

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• Password Policy seems to be ignored for new Domain on Windows Server 2008 R2

  - by Earl Sven

  I have set up a new Windows Server 2008 R2 domain controller, and have attempted to configure the Default Domain Policy to permit all types of passwords. When I want to create a new user (just a normal user) in the Domain Users and Computers application, I am prevented from doing so because of password complexity/length reasons. The password policy options configured in the Default Domain Policy are not defined in the Default Domain Controllers Policy, but having run the Group Policy Modelling Wizard these settings do not appear to be set for the Domain Controllers OU, should they not be inherited from the Default Domain policy? Additionally, if I link the Default Domain policy to the Domain Controllers OU, the Group Policy Modelling Wizard indicates the expected values for complexity etc, but I still cannot create a new user with my desired password. The domain is running at the Windows Server 2008 R2 functional level. Any thoughts? Thanks! Update: Here is the "Account policy/Password policy" Section from the GPM Wizard: Policy Value Winning GPO Enforce password history 0 Passwords Remembered Default Domain Policy Maximum password age 0 days Default Domain Policy Minimum password age 0 days Default Domain Policy Minimum password length 0 characters Default Domain Policy Passwords must meet complexity Disabled Default Domain Policy These results were taken from running the GPM Wizard at the Domain Controllers OU. I have typed them out by hand as the system I am working on is standalone, this is why the table is not exactly the wording from the Wizard. Are there any other policies that could override the above? Thanks!

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