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  • What info is really useful in my iptables log and how do I disable the useless bits?

    - by anthony01
    In my iptables rules files, I entered this at the end: -A INPUT -j LOG --log-level 4 --log-ip-options --log-prefix "iptables: " I DROP everything besides INPUT for SSH (port 22) I have a web server and when I try to connect to it through my browser, through a forbidden port number (on purpose), I get something like that in my iptables.log Sep 24 14:05:57 myserver kernel: [xx.xx] iptables: IN=eth0 OUT= MAC=aa:bb:cc SRC=yy.yy.yy.yy DST=xx.xx.xx.xx LEN=64 TOS=0x00 PREC=0x00 TTL=54 ID=59351 DF PROTO=TCP SPT=63776 DPT=1999 WINDOW=65535 RES=0x00 SYN URGP=0 Sep 24 14:06:01 myserver kernel: [xx.xx] iptables: IN=eth0 OUT= MAC=aa:bb:cc SRC= yy.yy.yy.yy DST=xx.xx.xx.xx LEN=48 TOS=0x00 PREC=0x00 TTL=54 ID=63377 DF PROTO=TCP SPT=63776 DPT=1999 WINDOW=65535 RES=0x00 SYN URGP=0 Sep 24 14:06:09 myserver kernel: [xx.xx] iptables: IN=eth0 OUT= MAC=aa:bb:cc SRC=yy.yy.yy.yy DST=xx.xx.xx.xx LEN=48 TOS=0x00 PREC=0x00 TTL=54 ID=55025 DF PROTO=TCP SPT=63776 DPT=1999 WINDOW=65535 RES=0x00 SYN URGP=0 Sep 24 14:06:25 myserver kernel: [xx.xx] iptables: IN=eth0 OUT= MAC=aa:bb:cc SRC=yy.yy.yy.yy DST=xx.xx.xx.xx LEN=48 TOS=0x00 PREC=0x00 TTL=54 ID=54521 DF PROTO=TCP SPT=63776 DPT=1999 WINDOW=65535 RES=0x00 SYN URGP=0 Sep 24 14:06:55 myserver kernel: [xx.xx] iptables: IN=eth0 OUT= MAC=aa:bb:cc SRC=yy.yy.yy.yy DST=xx.xx.xx.xx LEN=100 TOS=0x00 PREC=0x00 TTL=54 ID=35050 PROTO=TCP SPT=63088 DPT=22 WINDOW=33304 RES=0x00 ACK PSH URGP=0 Sep 24 14:06:55 myserver kernel: [xx.xx] iptables: IN=eth0 OUT= MAC=aa:bb:cc SRC=yy.yy.yy.yy DST=xx.xx.xx.xx LEN=52 TOS=0x00 PREC=0x00 TTL=54 ID=14076 PROTO=TCP SPT=63088 DPT=22 WINDOW=33264 RES=0x00 ACK URGP=0 Sep 24 14:06:55 myserver kernel: [xx.xx] iptables: IN=eth0 OUT= MAC=aa:bb:cc SRC=yy.yy.yy.yy DST=xx.xx.xx.xx LEN=52 TOS=0x00 PREC=0x00 TTL=54 ID=5277 PROTO=TCP SPT=63088 DPT=22 WINDOW=33248 RES=0x00 ACK URGP=0 Sep 24 14:06:56 myserver kernel: [xx.xx] iptables: IN=eth0 OUT= MAC=aa:bb:cc SRC=yy.yy.yy.yy DST=xx.xx.xx.xx LEN=100 TOS=0x00 PREC=0x00 TTL=54 ID=25501 PROTO=TCP SPT=63088 DPT=22 WINDOW=33304 RES=0x00 ACK PSH URGP=0 As you can see, I typed xx.xx.xx.xx:1999 in my browser, and it tried to connect until it timed out. 1) There are many similar lines for just one event. Do you think I need all of them? How would I avoid duplicates? 2) The last 4 lines are for my port 22. But since I allow port 22 INPUT for my web server, why are they here? 3) Do I need info like LEN,TOS,PREC and others? I'm trying to find a page that explains them one by one, by I can't find anything.

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  • Nagios Availability Report plotting in Graphite

    - by Roman Zenka
    I would like to plot my Nagios availability reports over time. Does anyone know a plugin that would do so? I found 'graphios' at https://github.com/shawn-sterling/graphios that would plot extra data provided by plugins. What I need instead is a plugin that would plot information such as: 'the service was in ERROR state 0.5% of the time last week, while the week before it was 1%'. This would be useful for knowing whether the overall stability is getting better.

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  • Reliability of S.M.A.R.T.?

    - by Mark
    I've been using ActiveSmart to monitor my hard-drives health for a few weeks now, and its telling me my brand new 1.5 TB hard-drive is half-dead already. About on-par with one of my hard-drives which I know is at least half dead because I've been having some read errors and heard ticking noises. Now I haven't actually noticed any problems with my 1.5 TB drive; should I be concerned that it's going to crap out on me too? Or could ActiveSmart be giving a mis-diagnosis because I use it a lot or something (I've used up 795 GB in the 2 and a half weeks I've had it). The events that ActiveSmart has been catching is "Hardware ECC recovered". Maybe these new fangled super big hard-drives somehow rely on ECCs to squeeze out the extra space, but this isn't actually a cause for concern?

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  • Client-based program to track response time for online webservice

    - by Søren Haagerup
    I am helping a customer with general IT support, and they have a problem with a hosted web-based system being slow. The provider of the system blames the client's computer, and the client calls me for help. I blame the provider, but it is hard to get them to do something about it without rock-solid evidence. And every time the provider comes around for a TeamViewer session, everything of course runs smoothly. Does there exist a client program or browser plugin that tracks statistics about response time for specific web services?

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  • How do I log which process is deleting a file on Windows XP?

    - by Jordan Milne
    I'm having an issue with a file getting deleted seemingly randomly throughout the day. The vendor of the software whose file is getting deleete says that another piece of software installed on the computer is deleting it, while the other software's vendor says the opposite. I've tried using Process Monitor so I can pinpoint exactly what's deleting it, but even when filtered specifically to that file, createfile operations are being triggered a few times a second, and I can't seem to filter it to deletions specifically. Is there a tool or script I can use to specifically monitor deletion attempts on a single file?

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  • Employee Tracking: Is there a similar software to Elance WorkView or oDesk "Team Room"?

    - by Kunal
    We are looking for a great commercial or free tool which can monitor all our remote employees and keep the reports centrally. We need it similar to Elance WorkView or oDesk "Team Room", what these tools do is: Take screenshots at random interval. Track the activity on computer based on key strokes. (not a necessity) It doesn't necessarily need to track time but will be good to have, our aim is to monitor employees and make sure they're working - that's all. I'll give oDesk Team Room 10/10 and I haven't been able to find such tool. Is there anyone who can suggest such tool? Thanks

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  • Very high memory usage, but not claimed by any process?

    - by SharkWipf
    While stress-testing LVM on one of our Debian servers, I came across this issue where memory would fill up a lot to the point where it would run the server out of memory, but no process would claim the memory. See http://i.imgur.com/cLn5ZHS.png, and see http://serverfault.com/a/449102/125894 for an explanation on the colors used in htop. Why is this happening? And is there any way to see what process is using the memory? Htop is configured not to hide any processes, so what is it that htop is missing? In this particular case, I can fairly certainly say that it is caused, directly or indirectly, by lvmcreate, lvmremove or dmsetup, as I was stress-testing that. Do note that this question is not about solving the LVM problem, but about why the memory isn't claimed by any process. Stopping all LVM commands does bring the memory back down to <600MB.

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  • HD read error while booting linux

    - by sidharth sharma
    I have been dual booting windows 7 and ubuntu on my laptop since the past 3 years and all was working fine until I started getting logs like ata1.00: status: { DRDY ERR } ata1.00: error: { UNC } ata1.00: configured for UDMA/133 sd 0:0:0:0: [sda] Unhandled sense code sd 0:0:0:0: [sda] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE sd 0:0:0:0: [sda] Sense key: Medium Error [Current][discreptor] I figured it was a hardware problem and ignored it as long as I could until the HD crashed on me. Then I got a brand new HD and put on windows and ubuntu afresh on it but the problem still persists. Any Help?

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  • Justifying a memory upgrade, take 2

    - by AngryHacker
    Previously I asked a question on what metrics I should measure (e.g. before and after) to justify a memory upgrade. Perfmon was suggested. I'd like to know which specific perfmon counters I should be measuring. So far I got: PhysicalDisk/Avg. Disk Queue Length (for each drive) PhysicalDisk/Avg. Disk Write Queue Length (for each drive) PhysicalDisk/Avg. Disk Read Queue Length (for each drive) Processor/Processor Time% SQLServer:BufferManager/Buffer cache hit ratio What other ones should I use?

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  • montoring service to detect when email is not received

    - by DGM
    I would like to monitor an email server - not whether the port is open and receiving, but rather that a "canary" message sent every so often actually arrives somewhere else. I have had a problem with a server getting firewalled off and no one noticing that cron jobs are not coming from the machine for a few weeks. Of course, the machine itself cannot send out a notification if it is having problems, so this requires an outside service. Any ideas?

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  • SCSI driver installation trouble

    - by Vicky
    I tried to install the driver of Adaptec 39320A-Ultra 320 SCSI card in Win2003 Server R2 SP2 in a DELL PowerEdge 2950 Server. I selected the driver from the list of drivers present in windows. But it says that the device could not be started(Code 10). I tried to put the card in a system that already had the driver installed. It worked fine. So there is no problem with the hardware. I even tried downloading the driver from the manufacturer website. When I try to select install from path and install that driver, it tell no matching driver found. When I install the default driver from windows, it shows the card in SCSI group of device manager, but with an ! symbol. Also the device ID in driver details was different from that of the one present in other system where it insalled fine. Any suggessions to solve it?

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  • Determine hostname of connected ethernet switch

    - by Beastcraft
    I've a bonding on two interfaces. I'd like to monitor wether they are connected to different switches (the switches have hostnames). ethX should be connected to switchX and ethY to switchY. Currently I'm checking this with following command: tcpdump -vv -s0 -i ethX ether host 01:00:0c:cc:cc:cc After a minute it prints out the hostname (and much more information) from the switch. Are there any other solutions to monitor this? Greeting

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  • Network Server Cabinets - How does the ventilation work?

    - by Nicholas
    Recently I've been looking at a range of network server cabinets with a mesh door at the rear. At the top of the cabinet are ceiling mounted fans with dust filters attached. These fans suck air out of the cabinet - presumably to remove the hot air that has risen to the top. My question is why do these fans have dust filters? What point do they serve? If the air flow is pulled in by these fans through the mesh door, then surely they are not there to protect the hardware inside from dust? Also, there are other minor grilled gaps around the enclosure, how does this kind of ventilation design work?

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  • Interface to collect successful remote backups status

    - by Aseques
    I would like to deploy into our infrastructure a web interface that could register when the copies are finished and if for some reason they haven't. The current issue is that we are doing on site backups for customers, for each backup a mail is sent ad the end of the backup, the problems is that sometimes the mail isn't sent for a variety of reasons: System doesn't have internet Backup system crashed before sending the mail etc.. What I'd like to do is to have a web interface that the backup software cant visit after doing the backup (either if it's a success or a fail), that acknowledges that the backup has finished, after some time, I'd like to receive a report of the machines that hadn't done the backup. Is there anything remotely similar to this that I could use/adapt to our environment? UPDATE: Just found out this (paessler.com) that seems to be a privative solution of what I intended.

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  • Automated Syslog Error Solution Finder

    - by Dru
    Any automated syslog solution finding frameworks? I want my central syslog server to email a list of problems, their severity and suggested solutions. There have been several questions about centralising system logs and alternative log analysis systems, but I don't get the impression that any of them help with issue resolution. A little background: At work I am now literally doing the work of two people, and both jobs have expanded beyond their initial frameworks. It is not so bad as I have helpers, but they are little more than smart monkeys. While one of my predecessors [I have two, that is how I know I have the jobs of two people] set-up logwatch to email its results out, my monkeys don't have the skills necessary to identify unimportant data. This has caused all of them, and myself sadly, to setup email filters and ignore the whole thing until something goes "bang". It would be handy to have someone else tell them what is important, what is connected, and to suggest a few ways to resolve the issue (I could train then to research the solution first, ha!). My reading of the Splunk and Octopussy sites indicates that I still need to bring my own highly trained monkey to the party. Which I am several years from having.

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  • Automated Syslog Error Solution Finder

    - by Dru
    Any automated syslog solution finding frameworks? I want my central syslog server to email a list of problems, their severity and suggested solutions. There have been several questions about centralising system logs and alternative log analysis systems, but I don't get the impression that any of them help with issue resolution. A little background: At work I am now literally doing the work of two people, and both jobs have expanded beyond their initial frameworks. It is not so bad as I have helpers, but they are little more than smart monkeys. While one of my predecessors [I have two, that is how I know I have the jobs of two people] set-up logwatch to email its results out, my monkeys don't have the skills necessary to identify unimportant data. This has caused all of them, and myself sadly, to setup email filters and ignore the whole thing until something goes "bang". It would be handy to have someone else tell them what is important, what is connected, and to suggest a few ways to resolve the issue (I could train then to research the solution first, ha!). My reading of the Splunk and Octopussy sites indicates that I still need to bring my own highly trained monkey to the party. Which I am several years from having.

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  • How do you monitor the health of a mirrored disk in Windows?

    - by NitroxDM
    I have a Mirrored Dynamic disk on my Windows 2003 Server. How do you monitor the health of the volume? Is there a way to have the server send an email when there is an issue with the volume? Is there a way to have the server run S.M.A.R.T. tests? EDIT: Nothing says WTF like logging into a client server, running DISKPART LIST VOLUME and seeing this. Volume ### Ltr Label Fs Type Size Status Info ---------- --- ----------- ----- ---------- ------- --------- -------- Volume 0 X xDrive NTFS Mirror 233 GB Failed Rd Volume 1 C NTFS Simple 57 GB Healthy System Volume 2 D DVD-ROM 0 B Healthy Volume 3 F RAW Partition 466 GB Healthy Volume 4 E New Volume NTFS Partition 932 GB Healthy

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  • Pages load in brower fine, but 404 not found reported for the page during the GET on all pages except index

    - by user885983
    I believe this question is more suited to serverfault (please correct me if not). This issue appears very similar to this question (except there are no 301 Moved Permanently for any pages). The domain is yorkshirebadges.co.uk. For example, loading yorkshirebadges.co.uk or yorkshirebadges.co.uk/index.php reports no 404s during network inspection. But every other page (/contact.php, /products.php) report a not found. Mod_rewrite is being used on the site, I checked this out but didn't see any obvious errors. It's included below for reference: RewriteEngine on RewriteRule ^store/material/([^/\.]+)/price/?([^/\.]+)?$ products.php?prodType=$1&price=$2 RewriteRule ^store/price/?([^/\.]+)?$ products.php?price=$1; RewriteRule ^store/material/?([^/\.]+)?$ products.php?prodType=$1 RewriteRule ^store/([^/\.]+)/?$ products.php?prodCat=$1 RewriteRule ^store/([^/\.]+)/price/([^/\.]+)$ products.php?prodCat=$1&price=$2 RewriteRule ^store/Type/?([^/\.]+) products.php?prodType=$1 RewriteRule ^store/([^/\.]+)/?([^/\.]+)?$ view-product-details.php?cat=$1&prodName=$2 RewriteRule ^store/([^/\.]+)/material/?([^/\.]+)?$ products.php?prodCat=$1&prodType=$2 RewriteRule analytics http://www.google.com/analytics <IfModule mod_suphp.c> suPHP_ConfigPath /home/yorkshir <Files php.ini> order allow,deny deny from all </Files> </IfModule> Chrome Network Inspection (and firebug on firefox) report 404s on all pages except the index, the server is apache2. Really scratching my head on this one!

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  • Configuring Nagios BGP plugin on Ubuntu

    - by user141610
    I am trying to configure nagios check_bgp_neighbors plug-in on Ubuntu and followed README file of check_bgp_neighbors plug-in. I have made following changes: define command{ command_name check_bgp_all command_line $USER1$/check_bgp_neighbors -H $HOSTADDRESS$ -C $USER3$ -n $ARG1$ -n $ARG2$ } to define command{ command_name check_bgp_all command_line /usr/local/nagios/libexec/check_bgp_neighbors.sh -H xx.xx.xx.49 -C xx.xx.xx.50 And define service{ use server-service hostgroup_name svc-bgp1 service_description BGP Check 1 check_command check_bgp_all!10.0.0.1!172.16.0.2 } to define service{ use generic-service hostgroup_name svc-bgp1 service_description BGP Check 1 check_command check_bgp_all!xx.xx.xx.50 } xx.xx.xx.49 is the IP of the host router and xx.xx.xx.50 is the IP of eBGP neighbour. After that it shows critical status. I know my command is not correct but cannot detect the problem. I learned that in this plug-in user-name and password of the host router are required but don't know how and where to provide it. Nagios log does not show any error message. Status information: Failed: status:0 prefixes:0 sent:0 received:0

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  • My WD passport detected but not shown on my computer

    - by Rakesh Patel
    1TB WD harddisk is detected in laptop but drives not visible on my computer. Under disk managment drives shown without letters. Right clicking on these drives give 2 options: Delete volume Help. The same harddisk was running well on the same laptop a day before. It is also showing full size of hard drives, Healthy (Primary Partition) etc. (this happened after harddisk usage by guest). Harddisk is new only (about 5 month usage) Please suggest: Is there hardware related problem inside harddisk, if so is it repairable? Is there any option to recover data?

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