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  • nginx with ssl: I get a 403 and log "directory index of '...dir...' is forbidden" log message. works fine with unencrypted connection

    - by user72464
    As mentioned in the title, I had nginx working fine with my rails app, until I tried to add the ssl server. The unencrypted connection still works but the ssl always returns me a 403 page with the following line in the error log: directory index of "/home/user/rails/" is forbidden, client: [my ip], server: _, request: "GET / HTTP/1.1", host: "[server ip]" Below my nginx.conf server block: server { listen 80; listen 443 ssl; ssl_certificate /etc/ssl/server.crt; ssl_certificate_key /etc/ssl/server.key; client_max_body_size 4G; keepalive_timeout 5; root /home/user/rails; try_files $uri/index.html $uri.html $uri @app; location @app { proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header X-Forwarded-Proto $scheme; proxy_set_header Host $http_host; proxy_redirect off; proxy_pass http://0.0.0.0:8080; } error_page 500 502 503 504 /500.html; location = /500.html { root /home/user/rails; } } the /home/user/rails directory and it's parent have all read to all rights. and they belong to the user nginx. the certificate and key file have the following rights: -rw-r--r-- 1 nginx root 830 Nov 8 09:09 server.crt -rw--w---- 1 nginx root 887 Nov 8 09:09 server.key any clue?

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  • How to log kernel panics without KVM

    - by Spacedust
    My server is crashing and I can't find an answer why. It all started after my datacenter upgrade RAM from 16 GB to 32 GB. I also found such logs in dmesg - they've started to show itself just before the first kernel panic: EXT4-fs error (device md2): ext4_ext_find_extent: bad header/extent in inode #97911179: invalid magic - magic 5f69, entries 28769, max 26988(0), depth 24939(0) EXT4-fs error (device md2): ext4_ext_remove_space: bad header/extent in inode #97911179: invalid magic - magic 5f69, entries 28769, max 26988(0), depth 24939(0) EXT4-fs error (device md2): ext4_mb_generate_buddy: EXT4-fs: group 20974: 8589 blocks in bitmap, 54896 in gd JBD: Spotted dirty metadata buffer (dev = md2, blocknr = 0). There's a risk of filesystem corruption in case of system crash. EXT4-fs error (device md2): ext4_ext_split: inode #97911179: (comm pdflush) eh_entries 28769 != eh_max 26988! EXT4-fs (md2): delayed block allocation failed for inode 97911179 at logical offset 1039 with max blocks 1 with error -5 This should not happen!! Data will be lost EXT4-fs error (device md2): ext4_mb_generate_buddy: EXT4-fs: group 21731: 5 blocks in bitmap, 60762 in gd JBD: Spotted dirty metadata buffer (dev = md2, blocknr = 0). There's a risk of filesystem corruption in case of system crash. My system is CentOS 5.8 64-bit with latest kernel 2.6.18-308.20.1.el5. How can I check what is the reason of kernel panic without having an access to the KVM ? I have told my datacenter admins to check the memory in the server.

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  • Should I use "Raid 5 + spare" or "Raid 6"?

    - by Trevor Boyd Smith
    What is "Raid 5 + Spare" (excerpt from User Manual, Sect 4.17.2, P.54): RAID5+Spare: RAID 5+Spare is a RAID 5 array in which one disk is used as spare to rebuild the system as soon as a disk fails (Fig. 79). At least four disks are required. If one physical disk fails, the data remains available because it is read from the parity blocks. Data from a failed disk is rebuilt onto the hot spare disk. When a failed disk is replaced, the replacement becomes the new hot spare. No data is lost in the case of a single disk failure, but if a second disk fails before the system can rebuild data to the hot spare, all data in the array will be lost. What is "Raid 6" (excerpt from User Manual, Sect 4.17.2, P.54): RAID6: In RAID 6, data is striped across all disks (minimum of four) and a two parity blocks for each data block (p and q in Fig. 80) is written on the same stripe. If one physical disk fails, the data from the failed disk can be rebuilt onto a replacement disk. This Raid mode can support up to two disk failures with no data loss. RAID 6 provides for faster rebuilding of data from a failed disk. Both "Raid 5 + spare" and "Raid 6" are SO similar ... I can't tell the difference. When would "Raid 5 + Spare" be optimal? And when would "Raid 6" be optimal"? The manual dumbs down the different raid with 5 star ratings. "Raid 5 + Spare" only gets 4 stars but "Raid 6" gets 5 stars. If I were to blindly trust the manual I would conclude that "Raid 6" is always better. Is "Raid 6" always better?

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  • PHP 5.4.9 Mysqli issue

    - by Vitaly
    On Ubuntu 12.04 server I had PHP 5.4.9 installed from the source: ./configure --prefix=/etc/php --with-apxs2=/etc/apache2/bin/apxs --with-config-file-path=/etc/php --with-config-file-scan-dir=/etc/php/conf.d --with-libxml-dir=/usr/local/libxml2 --with-xsl=/usr/local/libxslt --with-mysql --with-zlib --with-pdo-mysql --enable-calendar --with-gd --with-iconv-dir --enable-mbstring --enable-soap --enable-sockets --enable-zip --with-curl --with-openssl --with-kerberos --with-tidy' Then, using apt-get, I had mysql server and phpMyAdmin installed. Unfortunatelly phpMyAdmin keep saying that 'mysqli' and 'mcrypt' not installed. php -m | grep mysqli just confirms it. So I tried to install mysqli with "apt-get install php5-mysqli", but just got message to do it by means of "php5-mysqlnd" or "php5-mysql". Even though they are already installed (according to phpinfo()) I tried - doesn't work. However, in php.ini, there's mysqli staff like "extension=php_mysqli.dll", but no "extension=mysqli.so". And block [MySQLi] with some uncommented settings also present. Since this is my first attempt to build php from source I reckon I did some silly mistake. Any help is greatly appreciated.

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  • How to send email from home ip when the email server isn't a designated outbound mail server allocated to BT Retail customers [on hold]

    - by Mr Shoubs
    (I am sys admin!) I can receive email, but when I try to send an email from my home office via our work email server I get the following reply: Your message did not reach some or all of the intended recipients. Subject: Test Sent: 19/08/2014 17:02 The following recipient(s) cannot be reached: 'Joe Blogs' on 19/08/2014 17:02 Server error: '554 5.7.1 Service unavailable; Client host [my-ip-here] blocked using zen.spamhaus.org; http://www.spamhaus.org/query/bl?ip=my-ip-here' I went to that URL and it says the following: Ref: PBL231588 81.152.0.0/13 is listed on the Policy Block List (PBL) Outbound Email Policy of BT Retail for this IP range: It is the policy of BT Retail that unauthenticated email sent from this IP address should be sent out only via the designated outbound mail server allocated to BT Retail customers. Please consult the following URL for details on how to configure your email client appropriately. http://btybb.custhelp.com/cgi-bin/btybb.cfg/php/enduser/cci/bty_adp.php?p_sid=fPnV4zhj&p_faqid=6876 Removal Procedure Removal of IP addresses within this range from the PBL is not allowed by the netblock owner's policy. Going to this URL just says: This site has been disabled for the time being. Does anyone know what I should do to allow me to send emails from my home ip - the site suggests I can configure my email client? (note that I have configured the client to use smtp authentication)

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  • Backup solution to backup terabytes and lots of static files on linux server?

    - by user28679
    Which backup tool or solution would you use to backup terabytes and lots of files on a production linux server ? Note that the files are all different and almost never modified, and usage is mostly adding files, so data volume is today 3TB growing all the time at around +15GB/day. Please do not reply rsync. Basic unix tools are not enough, rsync does not keep history, rdiff-backup miserably fails from time to time and screw the history. Moreover these are all file based backup, which put a lot of IOwait just to browse directories and query stat(). But i guess, except R1Soft CDP, there is no way around that. We tried R1Soft CDP backup, which is block level backup, and it proved good and efficient for all our other servers, but systematically fails on the server with 3 terabytes and gazillions of files. That is already more than 2 months that the engineers of R1Soft and datacenter are playing a hot ball game... and still no backup except regular rsync We never tried big commercial solutions, except R1Soft CDP since it was provided as an optional service by the datacented hosting our servers.

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  • Port 22 is not responding

    - by Emanuele Feliziani
    I'm trying to make the jump to VPS from shared hosting for better performances and greater flexibility, but am stuck with the fact that I can't access the machine via ssh. First of all, the machine is a CentOS 6.3 cPanel x64 with WHM 11.38.0. Sshd is running (it appears in the current running processes). Making a port scan I see that port 22 is not responding. Port 21 is, but I am not able to access the machine via ftp (I think it's a security measure, but I don't know where to disable/enable it). So, I'm stuck in WHM and have no way to access the configuration of the machine, neither via ssh nor with ftp/sftp. When trying to connect with ssh via Terminal I only get this: ssh: connect to host xx.xx.xxx.xxx port 22: Operation timed out I also tried to access with the hostname instead of the IP address and it's the same. There seem to be no firewall in WHM and I have whitelisted my home IP address to access ssh, though there were no restrictions in the first place. I have been wandering through all the settings and options in WHM for several hours now, but can't seem to find anything. Does anybody have a clue as to where I should start investigating? Update: Thanks everyone. It was in fact a matter of firewall. There was a firewall not controlled by the WHM software. I managed to crack into the console from the vps control panel (a terrible, terrible java app that barely took my keyboard input) and disabled the firewall altogether running service iptables stop so that I was able to access the console via ssh with the terminal. Now I will have to set up the firewall again because the command I ran looks like having completely wiped the iptables. Can you recommend any newby-friendly resource where I can learn how to go about this and what should I block? Or should I just go with something like this: http://configserver.com/cp/csf.html ? Thanks again to everyone who helped me out.

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  • PHP Causing Segmentation Fault & Apache Blank Response

    - by Joe
    I recently updated a Debian Lenny server to php 5.3,5 using the dotdeb source. Soon after doing so certain (but not all) sites on the server stopped responding to requests. A blank response would be returned - no headers, no content, nothing. I found this related question on stackoverflow which seems to describe something similar and used the same code the user had in their answer to see if I could replicate the issue: <?php class A { public function __construct() { new B; } } class B { public function __construct() { new A; } } new A; print 'Loaded Class A'; ?> This triggered the problem - the page returned absolutely nothing despite the original question stating this was fixed in PHP 5.5.0. No CPU block as you'd expect, no wait, just an almost instant zero response. I then ran this same code from the cli (php -f test.php) and the only output I got was 'Segmentation fault'. Tailing the kernel log I've spotted: Feb 16 07:04:06 creature kernel: [192203.269037] php[17710] general protection ip:76ef37 sp:7fff155e9bb0 error:0 in php5[400000+870000] Feb 16 08:57:31 creature kernel: [199639.699854] apache2[31136]: segfault at 7fff13a84fe0 ip 7f730514ea40 sp 7fff13a85008 error 6 in libphp5.so[7f7304ce8000+915000] All extremely odd and I'm not sure what it's pointing to/what I should do to debug this further. As I said some sites work but code such as the above definitely trigger it. Not that the sites I want to server have code like that - it's just an example. Any help is much appreciated!

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  • Tunneling a public IP to a remote machine

    - by Jim Paris
    I have a Linux server A with a block of 5 public IP addresses, 8.8.8.122/29. Currently, 8.8.8.122 is assigned to eth0, and 8.8.8.123 is assigned to eth0:1. I have another Linux machine B in a remote location, behind NAT. I would like to set up an tunnel between the two so that B can use the IP address 8.8.8.123 as its primary IP address. OpenVPN is probably the answer, but I can't quite figure out how to set things up (topology subnet or topology p2p might be appropriate. Or should I be using Ethernet bridging?). Security and encryption is not a big concern at this point, so GRE would be fine too -- machine B will be coming from a known IP address and can be authenticated based on that. How can I do this? Can anyone suggest an OpenVPN config, or some other approach, that could work in this situation? Ideally, it would also be able to handle multiple clients (e.g. share all four of spare IPs with other machines), without letting those clients use IPs to which they are not entitled.

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  • Which AMI to to use for Java/Tomcat/MySQL in Amazon EC2?

    - by Justin
    I originally posted this on stackoverflow.com and it was suggested serverfault.com might be a better place to ask this question. So here goes: I'm trying to determine which Amazon Machine Image (AMI) to use as my Virtual Server in Amazon's EC2. For now, I'll need to choose an AMI that complies with the AWS Free Usage Tier. I want to deploy a Java app that I've been developing using Eclipse on Windows XP, Tomcat 7 and MySQL 5.5. I'm aware that I can choose the Basic 32-bit Amazon Linux AMI. Then I'd manually install Tomcat and MySQL (does MySQL get installed on the image or separately on an Elastic Block Store (EBS)?). Here's the rub, I'm a bit of a Linux noob. I can start Tomcat and tail the logs and such on Linux but I'm not familiar with the install process for Tomcat and MySQL on Linux and commands like sudo and chmod. I'm happy to get more hands on with Linux but I'm short on time right now. Are there AMI's that already have Tomcat and MySQL bundled? The Request Instance Wizard shows 805 Community AMI's that are Free Tier Eligible. 51 of the Free Tier Eligible AMI's have "Tomcat" in their name. I'm willing to consider using Elastic Beanstalk but my research thus far hasn't found any discussion of using MySQL with Beanstalk. The discussions all seem to use Amazon's SimpleDB. Any advice is greatly appreciated.

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  • Home Server: storage virtualisation, what to choose?

    - by Huygens
    I'm looking for virtualisation solutions for storage and OS for a home server. A sort of private cloud where I manage the storage space independently of the VM one. This question focus on storage management. (I have another question related to the VM/compute instance management). Here my environement and wishes. Server: HP Proliant MicroServer with 8 GB RAM (AMD Turion dual core with AMD-V technology) with 1 250GB system disk and up to 4 HDD (2 TB) for "data" OS types: only Linux (perhaps a *BSD VM in the future) Linux distributions do not matter, I'm familiar with RHEL, Fedora, Suse, Ubuntu, but any other recommandation will be fine The 4 HDD is going to be a software RAID array, probably RAID 5. storage should be "virtualised/cloudified": easy to extend: if I add a NAS on the network, I can include the NAS space capacity within this storage space as one virtual disk. This can be a NAS, an external HDD or another server. cluster FS or S3 style space or OpenStack block storage? Whatever is easier to manage/maintain and easy to integrate/plug to VM/compute instance. I would prefer free (libre, as in a free speach) and open source tools. But it does not have to be free as in a free beer. Note: the VMs I intend to run on top of this server are one dedicated to backup, one for a "owncloud/dropbox"-like service and perhaps one for media server (hosting video and photos). I'm not sure if traditional VMs or compute instance are the most suitable for this.

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  • Firefox cannot render icons from Font Awesome webfont set

    - by ADTC
    In Firefox (Windows 7), icons and glyphs that are called from the Font Awesome package do not render properly. An example of this can be seen on the Khan Academy website. Below the video the icons are shown as boxes with hex codes in them. This means that it isn't getting downloaded by Firefox. How it appears on Chrome (Windows 7), Safari (Mac OS X) and Stainless (Mac OS X): I found this question on Stack Overflow that may explain why this happens -- the CSS does use single quotes to enclose the font's src location. However, I don't have any write access to Khan Academy servers so I can't modify the actual website. I want to know if this can be fixed in Firefox, and how. I can run Greasemonkey scripts if that would help. I've already tried manually downloading the font and adding it to Windows' Fonts folder but this does not help. For reference, the CSS that sets this font up (not processed properly by Firefox) is: @font-face { font-family:'FontAwesome'; src:url('./fontawesome-webfont.eot'); src:url('./fontawesome-webfont.eot?#iefix') format('embedded-opentype'), url('./fontawesome-webfont.woff') format('woff'), url('./fontawesome-webfont.ttf') format('truetype'), url('./fontawesome-webfont.svg#FontAwesome') format('svg'); font-weight:normal; font-style:normal } [class^="icon-"]:before, [class*=" icon-"]:before { font-family:FontAwesome; font-weight:normal; font-style:normal; display:inline-block; text-decoration:inherit }

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  • How can I implement ansible with per-host passwords, securely?

    - by supervacuo
    I would like to use ansible to manage a group of existing servers. I have created an ansible_hosts file, and tested successfully (with the -K option) with commands that only target a single host ansible -i ansible_hosts host1 --sudo -K # + commands ... My problem now is that the user passwords on each host are different, but I can't find a way of handling this in Ansible. Using -K, I am only prompted for a single sudo password up-front, which then seems to be tried for all subsequent hosts without prompting: host1 | ... host2 | FAILED => Incorrect sudo password host3 | FAILED => Incorrect sudo password host4 | FAILED => Incorrect sudo password host5 | FAILED => Incorrect sudo password Research so far: a StackOverflow question with one incorrect answer ("use -K") and one response by the author saying "Found out I needed passwordless sudo" the Ansible docs, which say "Use of passwordless sudo makes things easier to automate, but it’s not required." (emphasis mine) this security StackExchange question which takes it as read that NOPASSWD is required article "Scalable and Understandable Provisioning..." which says: "running sudo may require typing a password, which is a sure way of blocking Ansible forever. A simple fix is to run visudo on the target host, and make sure that the user Ansible will use to login does not have to type a password" article "Basic Ansible Playbooks", which says "Ansible could log into the target server as root and avoid the need for sudo, or let the ansible user have sudo without a password, but the thought of doing either makes my spleen threaten to leap up my gullet and block my windpipe, so I don’t" My thoughts exactly, but then how to extend beyond a single server? ansible issue #1227, "Ansible should ask for sudo password for all users in a playbook", which was closed a year ago by mpdehaan with the comment "Haven't seen much demand for this, I think most people are sudoing from only one user account or using keys most of the time." So... how are people using Ansible in situations like these? Setting NOPASSWD in /etc/sudoers, reusing password across hosts or enabling root SSH login all seem rather drastic reductions in security.

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  • Is my OCZ SSD aligned correctly? (Linux)

    - by Barney Gumble
    I have an OCZ Agility 2 SSD with 40 GB of space. I use it as a system drive in Debian Linux (Squeeze) and in my opinion it's really fast. But I've read a lot on aligning partitions and file systems... And I'm not sure if I succeeded in aligning the partitions correctly. Maybe the SSD could be even faster?? ;-) I use ext4 and here is the output of fdisk -cul: Disk /dev/sda: 40.0 GB, 40018599936 bytes 255 heads, 63 sectors/track, 4865 cylinders, total 78161328 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: [...] Device Boot Start End Blocks Id System /dev/sda1 * 2048 73242623 36620288 83 Linux /dev/sda2 73244670 78159871 2457601 5 Extended /dev/sda5 73244672 78159871 2457600 82 Linux swap / Solaris My partitions were created just by the Debian Squeeze setup assistant. So I didn't care about the details of partitioning. But now I think maybe the installer didn't align it correctly? Actually, 2048 looks good to me (better than odd values like 63 or something like that) but I've no idea... ;-) Help plz! According to some "SSD Alignment Calculator" I found on the web, the OCZ SSDs have a NAND Erase Block Size of 512kB and their NAND Page Size is 4kB. 2048 is divisible by 4 and 512. So are the partitions aligned correctly?

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  • Denying access to website via htaccess based on http header

    - by neekster
    I've been trying for ages to get this to work and I can't put my finger on it. What I'm trying to do is block access to a site from a number of countries, based on the CF-IPCountry header added by CloudFlare. I figured htaccess was a suitable way to do this. We are running LiteSpeed 4.2.4 on top of DirectAdmin for a control panel. The problem we having is the htaccess rule doesn't seem to do anything. Here's the rule we tried: SetEnvIf CF-IPCountry AU UnwantedCountry=1 Order allow,deny Deny from env=UnwantedCountry Allow from all That makes no difference at all, connections are still accepted. Just to check that the rule was at least being processed, I changed Allow from all to Deny from all, and connections were refused. So it appears to be a problem wit the variable. Here's the relevant headers that come in with the request. Connection: Keep-Alive Accept-Encoding: gzip CF-Connecting-IP: xx.xx.xx.xx CF-IPCountry: AU X-Forwarded-For: xx.xx.xx.xx.xx CF-RAY: c9062956e2d04b6 X-Forwarded-Proto: http CF-Visitor: {"scheme":"http"} Zone-Name: xx.com.au Hopefully someone can help me out, this has been driving me nuts for too long. Thanks

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  • Blocking an IP from connecting

    - by Sam W.
    I have a problem with my Apache webserver where there's and IP than connecting to my server, using alot of connection and wont die which eventually making my webserver timeout. The connection will stay as SYN_SENT state if I check using netstat -netapu I even flush my iptables and use the basic rules and it still doesn't work. The IP will get connected when I start my Apache Basic rules that I use: iptables -A INPUT -i lo -j ACCEPT iptables -A INPUT ! -i lo -d 127.0.0.0/8 -j REJECT iptables -A INPUT -s 89.149.244.117 -j REJECT iptables -A OUTPUT -s 89.149.244.117 -j REJECT iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT iptables -A OUTPUT -j ACCEPT iptables -A INPUT -p tcp --dport 80 -j ACCEPT iptables -A INPUT -p tcp --dport 443 -j ACCEPT iptables -A INPUT -p tcp --dport 21 -j ACCEPT iptables -A INPUT -p icmp -m icmp --icmp-type 8 -j ACCEPT iptables -A INPUT -j REJECT iptables -A FORWARD -j REJECT The bold part is rule in question. Not sure this is related but tcp_syncookies value is 1. Can someone point out my mistake? Is there a way to block it for good. Thank you

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  • Using wildcard domains to serve images without http blocking

    - by iopener
    I read that browsers sometimes block waiting for multiple images from the same host, and I'm trying to do everything I can to speed up page load times. One caveat: I need to serve files over HTTPS. Any opinions about whether this is feasible: Setup a wildcard cert for *.domain.com. Whenever I need an image, generate an number based on a hash mod 5 of the filename, and append it to an 'img' subdomain (eg img1.domain.com, img4.domain.com, img3.domain.com, etc.); the hash will make any filename always use the same subdomain, and therefore the browser should be able to cache the images Configure a dynamic virtualhost record to point all img#. subdomains to /var/www/img I am looking for feedback about this plan. My concerns are: Will I get warnings when my page has https:// links to multiple subdomains? Is the dynamic virtualhost record I'm talking about even possible? Considering the amount of processing this would require, is it likely to even produce any kind of overall benefit? I'm probably averaging a half-dozen images per page, with only half being changed on each page refresh. Thanks in advance for you feedback.

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  • Bad performance with Linux software RAID5 and LUKS encryption

    - by Philipp Wendler
    I have set up a Linux software RAID5 on three hard drives and want to encrypt it with cryptsetup/LUKS. My tests showed that the encryption leads to a massive performance decrease that I cannot explain. The RAID5 is able to write 187 MB/s [1] without encryption. With encryption on top of it, write speed is down to about 40 MB/s. The RAID has a chunk size of 512K and a write intent bitmap. I used -c aes-xts-plain -s 512 --align-payload=2048 as the parameters for cryptsetup luksFormat, so the payload should be aligned to 2048 blocks of 512 bytes (i.e., 1MB). cryptsetup luksDump shows a payload offset of 4096. So I think the alignment is correct and fits to the RAID chunk size. The CPU is not the bottleneck, as it has hardware support for AES (aesni_intel). If I write on another drive (an SSD with LVM) that is also encrypted, I do have a write speed of 150 MB/s. top shows that the CPU usage is indeed very low, only the RAID5 xor takes 14%. I also tried putting a filesystem (ext4) directly on the unencrypted RAID so see if the layering is problem. The filesystem decreases the performance a little bit as expected, but by far not that much (write speed varying, but 100 MB/s). Summary: Disks + RAID5: good Disks + RAID5 + ext4: good Disks + RAID5 + encryption: bad SSD + encryption + LVM + ext4: good The read performance is not affected by the encryption, it is 207 MB/s without and 205 MB/s with encryption (also showing that CPU power is not the problem). What can I do to improve the write performance of the encrypted RAID? [1] All speed measurements were done with several runs of dd if=/dev/zero of=DEV bs=100M count=100 (i.e., writing 10G in blocks of 100M). Edit: If this helps: I'm using Ubuntu 11.04 64bit with Linux 2.6.38. Edit2: The performance stays approximately the same if I pass a block size of 4KB, 1MB or 10MB to dd.

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  • Unable to mount root fs over NFS [on hold]

    - by johnmadrak
    I am attempting to set up a Raspberry Pi running Pidora to boot from an NFS share. My configuration in cmdline.txt is: dwc_otg.lpm_enable=0 console=ttyAMA0,115200 console=tty1 root=/dev/nfs nfsroot=<serverip>:/fake/path,nfsvers=3,rw,nolock nfsrootdebug ip=dhcp elevator=deadline rootwait On the Pi, the output I see is: IP-Config: Got DHCP answer from <router>, my address is <clientip> IP-Config: Complete: device=eth0, hwaddr=<macaddress>, ipaddr=<clientip>, mask=255.255.255.0, gw=<routerip> host=<clientip>, domain=, nis-domain=(none) bootserver=<routerip>, rootserver=<serverip>, rootpath= nameserver0=<routerip> (It pauses for a bit here) VFS: Unable to mount root fs via NFS, trying floppy VFS: Cannot open root device "nfs" or unknown-block(2,0); error -6 Please append a correct "root=" boot option; here are the available partitions: ..... On the NFS Server (an OpenVZ Container), the output I see in the /var/log/messages is: Aug 22 23:24:01 vps-4178 rpc.mountd[928]: authenticated mount request from <clientip>:783 for /fake/path (/fake/path) Aug 22 23:24:38 vps-4178 rpc.mountd[928]: authenticated mount request from <clientip>:741 for /fake/path (/fake/path) Aug 22 23:25:25 vps-4178 rpc.mountd[928]: authenticated mount request from <clientip>:752 for /fake/path (/fake/path) Aug 22 23:26:12 vps-4178 rpc.mountd[928]: authenticated mount request from <clientip>:876 for /fake/path (/fake/path) To test, I've made sure I can mount (non-root) from both the Pi and another machine and it worked. Does anyone have an idea on what could be wrong or how to narrow it down? Thank you in advanced for your help.

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  • SVN checkout returns 400 error

    - by eboix
    I'm trying to download the http://code.opencv.org/svn/opencv/trunk/ repository of all of the OpenCV source code - as specified in an OpenCV installation tutorial. In the tutorial, the repository https://code.ros.org/svn/opencv/trunk/ is used, but they moved it to http://code.opencv.org/svn/opencv/trunk/, and now you need a password to access the code.ros.org repository. Anyway, I'm using TortoiseSVN to download the SVN repository. (I get the same error with http://sourceforge.net/projects/win32svn/) I get this: Checkout from http://code.opencv.org/svn/opencv/trunk, revision HEAD, Fully recursive, Externals included Server sent unexpected return value (400 Bad request. Method Unknown) in response to REPORT request for '/svn/opencv/!svn/vcc/default' On the TortoiseSVN site I found something about this 400 error: You're behind a firewall which blocks DAV requests. Most firewalls do that. Either ask your Administrator to change the firewall, or access the repository with https:// instead of http:// like in https://svn.collab.net/repos/svn/ That way you connect to the repository with SSL encryption, which firewalls can't interfere with (if they don't block the SSL port completely). Also some virus scanners (i.e. Kapersky) are known to interfere and cause this error. The code.ros.org repository is https://, so I would be able to access it, but I need a password, so I can't. I made an account on ros.org, but it seems that I still need a password (which I don't know) to access the code repository. My username-password combination does not work. I unblocked all of the TortoiseSVN programs in my firewall settings. Nothing changed. I temporarily stopped my firewall to see if it was interfering with my request. I got the same error. How can I do an svn checkout http://code.opencv.org/svn/opencv/trunk/opencv/ so that I don't get this error? Is there any way to make it https://? Any help would be appreciated!

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  • Apache directory authorization bug (clicking cancel gives acces to partial content)

    - by s4uadmin
    I got a minor problem (as the site is not high priority) but still a very interesting one. I have an apache root domain wherein other sites live "/var/www/" And I have foo.example.com forwarding to "/var/www/foo-example" (wordpress site) The problem here is that when you go to foo.example.com you are prompted to enter credentials. If you hit cancel it gives you the access denied page. But when you go to the servers' direct IP (this gives you the default index page) and hit cancel when prompted for credentials it just keeps giving you the login screen, and after pressing cancel a few times more it gives (a perhaps cached) bare html part of the page. How do I prevent this from happening? Perhaps this is a bug... Even if I would block access to the root directory when going to the ip/foo-example it would still do this. And I want to keep all the directories within the www directory or at least all in the same. Thanks PS: here is my configuration: <VirtualHost *:80> DocumentRoot /var/www/wp-xxxxxxx/ ServerName beta.xxxxxxxxx.nl <Directory "/var/www/wp-xxxxxxxxx/"> Options +Indexes AuthName "xxxxxxxx Beta Site" AuthType Basic require valid-user Satisfy all AuthBasicProvider file AuthUserFile /var/www/wp-xxxxxxx/.htxxxxxxxxx order deny,allow allow from all </Directory> ServerAdmin [email protected] ServerAlias beta.xxxxxxx.nl </VirtualHost>

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  • Using udev to create a character device based on a driver being loaded

    - by SteveCB
    I'm in the process of setting up RAID monitoring for a number of Dell servers that use the PERC 6i integrated card. We're using Nagios at present and the check_megasasctl plugin seems to fit the bill. However, the plugin relies upon the existence of: /dev/megaraid_sas_ioctl_node This device node doesn't exist by default, you have to create it by hand using something like: mknod /dev/megaraid_sas_ioctl_node c 253 0 Now, to make the existence of this device node persistent across reboots, I thought I could write a udev rule, but as usual, I'm missing something. I thought I could create a file such as /etc/udev/rules.d/10-local/rules that contained: DRIVER=="megasas" NAME="megaraid_sas_ioctl_node" MODE="0600" But this doesn't work - no device node after a reboot. Dmesg output indicates the megasas driver is loaded and functional: megasas: 00.00.04.01-RH1 Thu July 10 09:41:51 PST 2008 megasas: 0x1000:0x0060:0x1028:0x1f0c: bus 1:slot 0:func 0 megasas: FW now in Ready state Further, I don't see any means to instruct udev on which type of device node to create: character or block. I suspect I'm failing to understand exactly how udev is meant to work. I realise I could just cheat and run MegaCLI in /etc/rc.local, redirecting output to /dev/null; it creates the megaraid_sas_ioctl_node device node as part of its execution. I just thought using udev rules would be a) cleaner and b) a useful learning exercise. Perhaps I should just dump the above mknod command in /etc/rc.local... So how do I get udev to create the /dev/megaraid_sas_ioctl_node device node based on the presence of the megasas driver? Cheers Steve

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  • What's going on with traceroute?

    - by Kevin
    The following is what happens when I run traceroute from a certain location: # traceroute google.com traceroute to google.com (74.125.227.39), 30 hops max, 60 byte packets 1 gateway.local.enactpc.com (10.0.0.1) 0.138 ms 0.101 ms 0.084 ms 2 * * * 3 * * * 4 * * * 5 * * * 6 * * * 7 * * * 8 * * * 9 * * * 10 * * * 11 * * * 12 * * * 13 * * * 14 * * * 15 * * * 16 * * * 17 * * * 18 * * * 19 * * * 20 * * * 21 * * * 22 * * * 23 * * * 24 * * * 25 * * * 26 * * * 27 * * * 28 * * * 29 * * * 30 * * * Absolutely nothing of interest... Now, originally I thought this was just a fact of the location's network set up. (I assume they block pings or something...) However, watch what happens when I use nmap to run a traceroute... # nmap -sP --traceroute google.com Starting Nmap 5.21 ( http://nmap.org ) at 2012-09-25 22:18 CDT Nmap scan report for google.com (74.125.227.40) Host is up (0.034s latency). Hostname google.com resolves to 11 IPs. Only scanned 74.125.227.40 rDNS record for 74.125.227.40: dfw06s06-in-f8.1e100.net TRACEROUTE (using proto 1/icmp) HOP RTT ADDRESS 1 0.19 ms gateway.local.enactpc.com (10.0.0.1) 2 1.93 ms 99-20-92-1.lightspeed.austtx.sbcglobal.net (99.20.92.1) 3 25.61 ms 99-20-92-2.lightspeed.austtx.sbcglobal.net (99.20.92.2) 4 ... 6 7 23.68 ms 12.83.68.137 8 31.30 ms gar23.dlstx.ip.att.net (12.122.85.73) 9 ... 10 31.82 ms 72.14.233.65 11 32.27 ms 209.85.250.77 12 32.98 ms dfw06s06-in-f8.1e100.net (74.125.227.40) Nmap done: 1 IP address (1 host up) scanned in 3.29 seconds When using nmap I get A LOT more results than with traceroute, why? Note, I checked, and the difference in target IP addresses is not related...

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  • Vlan on DD-WRT v24 filesharing without internet

    - by user148888
    I'm planning to do a vlan with shared files without internet. my vlan is working correctly until I could lock the internet but I can not share files only I can ping from 172.168.1.x to 172.168.2.x but not backward. can u help me please?? This is my config. WRT54g DD-wrt v24 vlan0 eth 1,2,3 172.168.1.1/24 vlan1 Wan vlan2 eth 4 172.168.2.1/24(don't want internet here just Lan Conection) Pc (my pc) 172.168.1.10/24 gtway 172.168.1.1 (with internet) Ubiquity Nanostation loco M2 172.168.2.20/24(AP)(connect to eth 4 vlan2)(don't want internet here) Ubiquity Nanostation loco M2 172.168.2.21/24(Client)(don't want internet here) Friend pc 172.168.2.115/24(connected from the client)(don't want internet here) Any Help Please.. ![Lan Map][1] ![Vlan Config1][2] ![Vlan Config2][3] ![Vlan Config3][4] ![Command to block internet][5] [url=http://imageshack.us/photo/my-images/194/lanxl.jpg/][img=http://imageshack.us/a/img194/4197/lanxl.th.jpg][/url] [url=http://imageshack.us/photo/my-images/600/commandmf.jpg/][img=http://imageshack.us/a/img600/9530/commandmf.th.jpg][/url] [url=http://imageshack.us/photo/my-images/811/57398524.jpg/][img=http://imageshack.us/a/img811/1917/57398524.th.jpg][/url] [url=http://imageshack.us/photo/my-images/717/48064277.jpg/][img=http://imageshack.us/a/img717/829/48064277.th.jpg][/url] [url=http://imageshack.us/photo/my-images/685/21456517.jpg/][img=http://imageshack.us/a/img685/256/21456517.th.jpg][/url]

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  • I get "An error occurred while Windows was synchronizing with [name of time server]." when trying t

    - by ChrisF
    Prompted by the answers to this question I decided to give the Windows built in time synchronisation another go. However, no matter what time server I use I get this error: "An error occurred while Windows was synchronizing with [name of time server]." The help suggests the following as reasons for failure: You are not connected to the Internet. Establish an Internet connection before you attempt to synchronize your clock. Your personal or network firewall prevents clock synchronization. Most corporate and organizational firewalls will block time synchronization, as do some personal firewalls. Home users should read the firewall documentation for information about unblocking network time protocol (NTP). You should be able to synchronize your clock if you switch to Windows Firewall. The Internet time server is too busy or is temporarily unavailable. If this is the case, try synchronizing your clock later, or update it manually by double-clicking the clock on the taskbar. You can also try using a different time server. The time shown on your computer is too different from the current time on the Internet time server. Internet time servers might not synchronize your clock if your computer's time is off by more than 15 hours. To synchronize the time properly, ensure that the date and time settings are set close to your current time in the Date and Time Properties in Control Panel. Now the first reason is clearly wrong - I am connected to the internet. I can see the 2nd being the most likely cause. I have Sygate Personal Firewall running, but it normally asks if something it trying to connect for the first time. Does anyone know I can unblock the NTP protocol - or at least check if it is blocked?. I don't think it's #3 or #4 as I've tried a number of different servers including the one currently used by Atomic Clock Sync. Though if someone knows the address of a UK time server I can double check this.

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