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  • Home computer as ssh bridge

    - by pistacchio
    Hi at work, due to our network configuration, i cannot ssh external servers. We are on a Windows environment. I need to ssh a server of mine, but i can only exit from our LAN via port 88. How could I use my home MacOs box to accept an http connection from my home computer and route it via ssh to the server i need to' connect to? Thanks.

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  • How much did it cost our competitor to DDoS us at 50 Gbps for two weeks?

    - by MiniQuark
    I know that this question may sound like an invalid serverfault question, but I believe that it's quite valid: the amount of time and effort that a sysadmin should spend on DDoS protection is a direct function of typical DDoS prices. Let me rephrase this: protecting a web site against small attacks is one thing, but resisting 50 Gbps of UDP flood is another and requires time & money. Deciding whether or not to spend that time & money depends on whether such an attack is likely or not, and this in turn depends on how cheap and simple such an attack is for the attacker. So here's the full story: our company has been victim to a massive DDoS attack (over 50 Gbps of UDP traffic, full-time during 2 weeks). We are pretty sure that it's one of our competitors, and we actually know which one, because we were the only two remaining competitors on a very big request for proposal, and the DDoS attack magically stopped the day we won (double hurray, by the way)! These people have proved in the past that they are very dishonest, but we know that they are not technical at all, so we believe that they simply paid for some botnet DDoS service. I would like to know how much these services typically cost, for such a large scale attack. Please do not give any link to such services, I would really hate to give these people any publicity. I understand that a hacker could very well do this for free, but what's a typical price for such an attack if our competitors paid for it through some kind of botnet service? It is really starting to scare me (if we're talking thousands of dollars here, then I am really going to freak off: who knows, they might just hire a hit-man one day?). Of course we filed a complaint, but the police says that they cannot do much about it (DDoS attacks are virtually untraceable, so they say), and our suspicions are not enough to justify them raiding our competitor's offices to search for proofs. For your information, we now changed our infrastructure to be able to sustain such attacks: we now use a major CDN service so that our servers are not directly affected by DDoS attacks. Requests for dynamic pages do get proxied to our servers, but for low level attacks (UDP flood, or Syn floods, for example) we only receive legitimate trafic, so we're fine. If they decide to launch higher level attacks (HTTP flood or slowloris attacks for example), most of the load should be handled by the CDN... at least I hope so! Thank you very much for your help.

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  • Any 3rd party tools that integrate IIS management with some sort of application inventory/change man

    - by NoCarrier
    I've got an environment with several IIS 6 web servers hosting hundreds of apps (dozens of sites, hundreds of virtual directories) all with a myriad of different configurations belonging to dozens of different developers (all deploying apps willy nilly). Is there some sort of managed software solution that will centralize management of all my IIS6 environments provide some inventory functionality allow for reporting or querying of said application inventory enforce and automate some sort of deployment process?

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  • Xen guest miration to host with missing features

    - by deploymonkey
    If I want to move a xen guet (domU) from one host (dom0) to another host on another hardware platform which misses some capabilities, say virtualisation features, especially directio or likewise, will my image be able to run despite missing capabilities of the new host? This is important because I need to know if I can prepare XEN images on my workstation with full virtualisation features and deploy same images on less capable Servers later on. Thanks for the help and input

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  • Alternate way to create a clone of a UNIX System

    - by Spirit
    THE STORY: (If you don't like to read much, down below is the question :) ) Where I work we have two HP RP2470 servers same hardware same number of hard drives same everything :). One of them is a production server and runs HP-UX 11.00. The poor ba***rd hasn't been turned off for years and now I have to make a clone of it on the other server - just in case, for redundancy. The problem is simple (or not simple) as I have to make the the other server exactly the same. However the old version of OS (UX 11.00 is a history now) and the old software running on it, have made my task almost impossible. On the production server there is also a cloning/recover utility Ignite-UX. I tried many times to create a recovery tape with it. Then when I load the tape on the backup server, it succeeds with the loading of the tape (no errors no warnings) but on the next restart it fails to load the OS :S and drops into HP`s ISL prompt. --- THE QUESTION: Is there an alternate way to create a clone of the Unix System? The environment is: 1. 2x HP RP2470 Servers (non-Intel), same hardware, same number od HDDs (two each of them) same everything. 2. OS running: HP-UX 11.00 The production server has to be cloned without downtime - sadly :( as I hope that they will reconsider on this one For example (like on Windows platforms), if you try to copy an entire HDD with Windows inside on another HDD, and then put that HDD on another PC it will still work, as long as the hardware is the same. Can I do something like that with a Unix system? Can I somehow COPY the contents of the entire HDD, put those on another HDD, and then just load the HDD into the other server? (If you haven't read the story the servers are exactly the same) Will it work? Can it be done with ordinary commands like cp or dump or something like that? Does any one have a similar experience? --- UPDATE: 26.01.2012 NOTE: The update is related to "The Story". If you haven't read that part then you can skip this update. This is just a short update on the recover logs from the Ignite Tape.. someone with more exp. might notice something.. ... --- READING CONTENTS OF THE IGNITE TAPE --- --- OUTPUT OMITED --- ... ... x ./configure3, 413696 bytes, 808 tape blocks x ./monitor_bpr, 20480 bytes, 40 tape blocks * Download_mini-system: Complete * Loading_software: Begin * Installing boot area on disk. * Enabling swap areas. * Backing up LVM configuration for "vg00". * Processing the archive source (Recovery Archive). * Wed Jan 25 15:27:32 EST 2012: Starting archive load of the source (Recovery Archive). * Positioning the tape (/dev/rmt/0mn). * Archive extraction from tape is beginning. Please wait. * Wed Jan 25 15:39:52 EST 2012: Completed archive load of the source (Recovery Archive). * Executing user specified script: "/opt/ignite/data/scripts/os_arch_post_l". * Running in recovery mode (os_arch_post_l). * Running the ioinit command ("/sbin/ioinit -c") * Creating device files via the insf command. insf: Installing special files for sdisk instance 0 address 0/0/1/1.15.0 insf: Installing special files for sdisk instance 1 address 0/0/2/0.1.0 insf: Installing special files for sdisk instance 2 address 0/0/2/1.15.0 insf: Installing special files for stape instance 0 address 0/0/1/0.3.0 insf: Installing special files for btlan instance 0 address 0/0/0/0 insf: Installing special files for btlan instance 1 address 0/2/0/0 insf: Installing special files for pseudo driver dlpi insf: Installing special files for pseudo driver kepd insf: Installing special files for pseudo driver framebuf insf: Installing special files for pseudo driver sad * Running "/opt/upgrade/bin/tlinstall -v" and correcting transition link permissions. * Constructing the bootconf file. * Setting primary boot path to "0/0/1/1.15.0". * Executing: "/var/adm/sw/products/PHSS_20146/pfiles/iux_postload". * Executing: "/var/adm/sw/products/PHSS_25982/pfiles/iux_postload". NOTE: tlinstall is searching filesystem - please be patient NOTE: Successfully completed * Loading_software: Complete * Build_Kernel: Begin NOTE: Since the /stand/vmunix kernel is already in place, the kernel will not be re-built. Note that no mod_kernel directives will be processed. * Build_Kernel: Complete * Boot_From_Client_Disk: Begin * Rebooting machine as expected. NOTE: Rebooting system. sync'ing disks (0 buffers to flush): 0 buffers not flushed 0 buffers still dirty Closing open logical volumes... Done Console reset done. Boot device reset done. ********** VIRTUAL FRONT PANEL ********** System Boot detected ***************************************** LEDs: RUN ATTENTION FAULT REMOTE POWER FLASH OFF OFF ON ON LED State: Running non-OS code. (i.e. Boot or Diagnostics) ... ... ... --- SERVER IS PERFORMING POST SEQUENCE HERE --- --- OUTPUT OMITED --- ... ... ... ***************************************** ************ EARLY BOOT VFP ************* End of early boot detected ***************************************** Firmware Version 43.50 Duplex Console IO Dependent Code (IODC) revision 1 ------------------------------------------------------------------------------ (c) Copyright 1995-2002, Hewlett-Packard Company, All rights reserved ------------------------------------------------------------------------------ Processor Speed State CoProcessor State Cache Size Number State Inst Data --------- -------- --------------------- ----------------- ------------ 0 650 MHz Active Functional 750 KB 1.5 MB 1 650 MHz Idle Functional 750 KB 1.5 MB Central Bus Speed (in MHz) : 120 Available Memory : 2097152 KB Good Memory Required : 16140 KB Primary boot path: 0/0/1/1.15 Alternate boot path: 0/0/2/1.15 Console path: 0/0/4/1.643 Keyboard path: 0/0/4/0.0 Processor is starting autoboot process. To discontinue, press any key within 10 seconds. 10 seconds expired. Proceeding... Trying Primary Boot Path ------------------------ Booting... Boot IO Dependent Code (IODC) revision 1 HARD Booted. ISL Revision A.00.38 OCT 26, 1994 ISL booting hpux ISL>

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  • PHP Websites: Very high IOPS

    - by Khuram
    We are hosting a set of websites on VM Cloud. These sites were previously on a couple of dedicated servers but to enhance performance, we transferred them onto a Cloud environment. The Cloud has SSD storage but they are now saying that we have very high IOPS and are goign to degrade us if we do not do anything soon. We have good PHP Websites but they are run without any Caching. how do I start to debug this? Sincerely, Khuram

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  • How to know disk quota on network share in windows?

    - by myforwik
    I connect to a share on a windows server and I have a quota of unknown size. All the tools I have seen are reporting the disk size/disk free space, not the quota size for myself. The only way I can figure out my quotas is to keep writing junk until I reach the quota. There must be a better way than this? My PC is windows XP and the servers are mainly 2003server.

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  • raid 6 vs raid 10? which would you choose.

    - by dasko
    my choice would be raid 6 for a file server since you can lose two drives and it does not matter which set of two can die. from what i understand with raid 10 you can lose two drives but if they happen to be off the same raid 1 then you are a out of luck? any suggestions? basic file server with about 200gb of data and it would act as a single point of backup for other workstations and servers. thanks in advance.

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  • Default Critique branch office setup: VPNTunnel->HQ, subnets for VOIP/PC, + several Q's

    - by CHickenTaragon
    We're setting up a new branch office. * ~10 users. * Each user has a VOIP phone provided by a hosted solution. * Users need access to resources on HQ (located in another state), so setting up VPN tunnel * HQ only supports certain Cisco/Juniper devices. VOIP provider only supports SonicWall, so current plan is to have two routers w/ separate subnets for VOIP vs. PC traffic. * PC's will plug into pass-thru Ethernet jacks on the VOIP phones, but the phones vs. PC's will point to different subnets. * Cable Modem is 50Mbps / 5Mbps DOCSIS 3.0 business line w/ 5 static IP's. * Each of the 2 subnets will map to one of the 5 public IP's. * May or may not also need to support a VPN tunnel with a second branch office because of a file server they have there that some in the new office use. I'm pushing to have them move the files to a server on the HQ's network so we don't have to worry about setting up an additional tunnel. Questions: Do you foresee any issues with the below set-up? Router recommendations by HQ IT staff: Cisco Router 2811, or Juniper SSG5 or SSG20. Any recommendations about these routers? We need Wi-Fi too – looks like the above routers have models that support this, any reason not to use this? Users need to be able to work from home. If so, how is authentication handled? Right now we use AD credentials for the HQ's domain, but we currently don't plan to have an AD system in the new location since it's only 10 users. We can't tie the authentication system from the new location's router to the AD system of the HQ. All the PC's that will be in the new location are currently in the existing office that is closing down, and are already joined to the domain of the HQ. Please confirm: this + the VPN tunnel will be sufficient for them to connect to authenticated resources on the HQ's network from the new location, correct? Mainly SQL servers and file servers, and a few remote desktop sessions. I'm sure I'll have some more questions, but can't think of them right now.

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  • Problem with SQL connection on virtualised machines

    - by Mike Selby
    We have just virtualised our web servers but are experiencing problems when trying to connect with the existing DB server. The error message that is being returned from the virtual machines is as follows: A connection was successfully established with the server, but then an error occurred during the login process. (provider: TCP Provider, error: 0 - The specified network name is no longer available.) Any help would be much appreciated - Many thanks in advance.

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  • Do I really need mod_security?

    - by Rob
    I'm doing a clean install of my server and I'm looking for some advice on whether or not I actually need the Apache mod_security module. I consider myself to be a bit security paranoid when it comes to my servers, but is it worth going through all the hassle to install and debug a new config of mod_security?

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  • Taskbar on secondary monitor in XP?

    - by Hemal Pandya
    I am looking for a free virtual-desktop program that will allow me to put a different virtual desktop on each of my two monitors (one on laptop and the other external) How I would like to use it: I do a lot of work connecting to other servers using remote desktop. I would like to use the external monitor to open remote desktop in full screen and use the laptop monitor for the local machine to view my mails, chat, browser, etc. I am using XP SP3.

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  • best way to import mailing list archives

    - by Naveen Garg
    I tried reading mailing lists in gnus in emacs, but emacs stops responding with the slow nntp servers downloads. nabble, gmane etc are also kind of slow. So I thought about download the gzipped archives available from most mailing lists. here are some nice instructions to import these archives into thunderbird. Is there a similar streamlined way to read the unziped archives in emacs, or other software ?

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  • Is sending email from EC2 / Rackspace Cloud a bad idea?

    - by Michael Buckbee
    In this article it mentions that TrendMicro is now treating all emails from Amazon's EC2 as coming from "Dial Up Users": likely to be spam and this is creating severe deliverability issues with their emails. We're having all kinds of issues sending email from our app servers on Rackspace cloud (which may or may not be DUL'd) and I wonder if this isn't just a losing battle and we should try to get a different host for our SMTP server.

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  • Zend Server + Daemontools

    - by Ben
    Hey, Is anyone running Zend Server under Daemontools? I know I can use -D NO_DETACH to run apache under daemontools. But, I'm not sure if the other Zend Server components (monitor, lighthttpd, scd, jobqueue) have similar options. (The end goal is "run Zend Server with service supervision", so upstart would be fine too. For reference, my servers are running Ubuntu 10.04 LTS.) Ben

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  • Making Active Directory changes atomic

    - by Matt Simmons
    I've got a Windows 2003 Active Directory infrastructure, and there are times (such as when terminating an employee) that I want instantaneous propagation across both of my AD servers. Currently, I make the change in both places, which I suspect is unhealthy, but it's the only way I know to make sure that the account is disabled to every machine. Is there a better way? Do I have to wait for the normal propagation time for convergence, or is there a way to "force" it?

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  • CNAME to another domain fails on some office networks, why?

    - by crashalpha
    Our domain "aspenfasteners.com" is hosted by Volusion. We have CNAME records "find" and "search" which point to site indexing accounts on www.picosearch.com. These addresses fail on SOME private office networks which have their own DNS. We suspect the problem comes from Volusion's own name servers, n2.volusion.com and n3.volusion.com. Volusion support on problems this technical is non-existant. We have tried an NSLOOKUP on find.aspenfasteners.com with level 2 debugging info, and we got the results below. Is it possible that the local DNS is recursing to Volusion's name servers, and that while Volusion DOES return the canonical name, they do NOT resolve the address? Can anybody with expertise in this sort of stuff PLEASE look at the NSLOOKUP below and tell me if we are right, because Volusion is giving me absolutely NO support on this topic. I need proof of where the problem lies. Thanks VERY much! Carlo find.aspenfasteners.com Server: mtl-srm-dbsv-01.fastenerwholesale.com Address: 192.168.0.44 SendRequest(), len 61 HEADER: opcode = QUERY, id = 8, rcode = NOERROR header flags: query, want recursion questions = 1, answers = 0, authority records = 0, additional = 0 QUESTIONS: find.aspenfasteners.com.fastenerwholesale.com, type = A, class = IN ------------ Got answer (138 bytes): HEADER: opcode = QUERY, id = 8, rcode = NXDOMAIN header flags: response, auth. answer, want recursion, recursion avail. questions = 1, answers = 0, authority records = 1, additional = 0 QUESTIONS: find.aspenfasteners.com.fastenerwholesale.com, type = A, class = IN AUTHORITY RECORDS: -> fastenerwholesale.com type = SOA, class = IN, dlen = 46 ttl = 3600 (1 hour) primary name server = mtl-srm-dbsv-01.fastenerwholesale.com responsible mail addr = admin.fastenerwholesale.com serial = 10219 refresh = 900 (15 mins) retry = 600 (10 mins) expire = 86400 (1 day) default TTL = 3600 (1 hour) ------------ SendRequest(), len 41 HEADER: opcode = QUERY, id = 9, rcode = NOERROR header flags: query, want recursion questions = 1, answers = 0, authority records = 0, additional = 0 QUESTIONS: find.aspenfasteners.com, type = A, class = IN ------------ Got answer (141 bytes): HEADER: opcode = QUERY, id = 9, rcode = NXDOMAIN header flags: response, auth. answer questions = 1, answers = 1, authority records = 1, additional = 1 QUESTIONS: find.aspenfasteners.com, type = A, class = IN ANSWERS: -> find.aspenfasteners.com type = CNAME, class = IN, dlen = 17 canonical name = www.picosearch.com ttl = 3600 (1 hour) AUTHORITY RECORDS: -> com type = SOA, class = IN, dlen = 43 ttl = 900 (15 mins) primary name server = ns3.volusion.com responsible mail addr = admin.volusion.com serial = 1 refresh = 900 (15 mins) retry = 600 (10 mins) expire = 86400 (1 day) default TTL = 3600 (1 hour) ADDITIONAL RECORDS: -> ns3.volusion.com type = A, class = IN, dlen = 4 internet address = 65.61.137.154 ttl = 900 (15 mins) * mtl-srm-dbsv-01.fastenerwholesale.com can't find find.aspenfasteners.com: Non-existent domain

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  • What happens when the server that the Remote Desktop Connection Broker goes down?

    - by Frank Owen
    I would like to setup the Remote Desktop Connection Broker to allow better load balancing of the two terminal servers we have as well as allowing the user to re-establish to the correct server if they get disconnected. My worry is, if I set this up and the server this service is running goes down, does the terminal server stop accepting connections or will they just lose the benefit of having RDCB turned on? I don't want to add another point of failure in this equation unless I have to.

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