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  • IP Blacklists and suspicious inbound and outbound traffic

    - by Pantelis Sopasakis
    I administer a web server and recently we had our IP banned (!) from our host after they received a notification e-mail for abuse. In particular our server is allegedly involved in spam attacks over HTTP. The content of the abuse report email we received was not much informative - for example the IP addresses our server is supposed to have attacked against are not included - so I started a wireshark session checking for suspicious traffic over TCP/HTTP while trying to locate possible security holes on the system. (Let me note that the machine runs a Debian OS). Here is an example of such a request... Source: 89.74.188.233 Destination: 12.34.56.78 // my ip Protocol: HTTP Info: GET 'http://www.media.apniworld.com/image.php?type=hv' HTTP/1.0 I manually blacklisted this host (as well as some other ones) blocking them with iptables, but I can't keep on doing manually all day long... I'm looking for an automated way to block such IPs based on: Statistical analysis, pattern recognition or other AI-based analysis (Though, I'm reluctant to trust such a solution, if exists) Public blacklists Using DNSBL I actually found out that 89.74.188.233 is blacklisted. However other IPs which are strongly suspicious like 93.199.112.126 (i.e. http://www.pornstarnetwork.com/account/signin), unfortunately were not blacklisted! What I would like to do is to automatically connect my firewall with DNSBL (or some other blacklist database) and block all traffic towards blacklisted IPs or somehow have my local blacklist automatically updated.

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  • Upgrade to ubuntu 13.04 from 12.04 with iso image

    - by Digvijay Yadav
    I have ubuntu 12.04 installed on my system. I want to upgrade it to ubuntu 13.04. I want to do this upgrade using an iso image of ubuntu 13.04. I tried this Solution But it didn't work for me. After running these command I didn't get any alerts about updating. Also I don't understand the gksu part of the solution. Here are the steps I tried: sudo mount -t iso9660 -o loop PATH/TO/ISO /cdrom then sudo /cdrom/cdromupgrade Read more: http://linuxpoison.blogspot.tw/2011/06/how-to-upgrade-ubuntu-using-alternate.html#ixzz2SFMqlOPx I also wanted to know, If I can do this using a networked computer. By this I mean the iso file is on some other computer. Thank you.

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  • Run a script after killing lxsession (xorg)

    - by user284194
    I am trying to run a program automatically within a bash script after killing the LXDE session. My script consists of: #!/bin/sh pkill lxsession; sh /home/pi/RetroPie/EmulationStation/emulationstation My aim is to log out of the LXDE session and run EmulationStation on my Raspberry Pi with a bash script. I'm using pkill lxsession; to bypass lxsession's logout confirmation dialog. As it stands, this script just gets me to the command line from a working LXDE desktop. Thanks for reading.

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  • Recommendations on managing dot files for users using Puppet

    - by Beaming Mel-Bin
    Goal is to have a collection of dot files (.bashrc, .vimrc, etc.) in a central location. Once it's there, Puppet should push out the files to all managed servers. I initially was thinking of giving users FTP access where they could upload their dot files and then having an rsync cron job. However, it might not be the most elegant or robust solution. Wanted to see if anyone else had some recommendations.

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  • How to prioritize openvpn traffic?

    - by aditsu
    I have an openvpn server, with one network interface. VPN traffic is extremely slow. I tried to do traffic control with this configuration (currently): qdisc del dev eth0 root qdisc add dev eth0 root handle 1: htb default 12 class add dev eth0 parent 1: classid 1:1 htb rate 900mbit #vpn class add dev eth0 parent 1:1 classid 1:10 htb rate 1500kbit ceil 3000kbit prio 1 #local net class add dev eth0 parent 1:1 classid 1:11 htb rate 10mbit ceil 900mbit prio 2 #other class add dev eth0 parent 1:1 classid 1:12 htb rate 500kbit ceil 1000kbit prio 2 filter add dev eth0 protocol ip parent 1:0 prio 1 u32 match ip sport 1194 0xffff flowid 1:10 filter add dev eth0 protocol ip parent 1:0 prio 2 u32 match ip dst 192.168.10.0/24 flowid 1:11 qdisc add dev eth0 parent 1:10 handle 10: sfq perturb 10 qdisc add dev eth0 parent 1:11 handle 11: sfq perturb 10 qdisc add dev eth0 parent 1:12 handle 12: sfq perturb 10 But it's still extremely slow. I have an imaps connection that keeps transferring data continuously (I successfully limited the rate) but with openvpn I can't seem to get more than about 100kbit/s The internet connection speed is about 3mbit/s (symmetric) What could be the problem? Does the sport filter work for udp?

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  • Is it possible to either abort or interrupt and later continue a lvconvert -m1 operation?

    - by SLi
    I have run the command lvconvert -m1 rootvg/newroot /dev/sdb to convert a linear logical volume to a mirrored one. The operation has not yet finished; I interrupted the command with ctrl-c at around 10% mark, but the operation seems to be running in the background anyway. Is it possible to either 1) Abort the lvconvert operation and revert to the state before it? (This would be my preferred option) 2) To safely interrupt the operation and resume it later?

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  • Amarok 2.1.1 Does not go to the next song

    - by nigative
    Hi, I just updated Amarok from KDE3 version and it looks a bit weird and different. But my problem is after I updated my music collection and started to play it (it is all loaded into my playlist), amarok doesn't start next song after the current song is finished. I have repeat(repeat playlist) and random(random tracks) options enabled. Thanks.

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  • Constantly diminishing free space on fedora 17

    - by Varun Madiath
    I don't know how to explain this other than to say that my computer seems to magically run out of free when it runs for a while. The output of df -h . oh my home direction is below /dev/mapper/vg_vmadiath--dev-lv_home 50G 47G 0 100% /home When I run sudo du -cks * | sort -rn | head -11 on /home I get the following output. I got this from decreasing free space on fedora 12 32744344 total 32744328 vmadiath 16 lost+found If I restart my system things seem to fix themselves and I'm left with about 20 or 25GB of free space. I'm running XFCE with XMonad as my window manager under fedora 17. Programs I'm running include the XFCE terminal, grep, find, firefox, eclipse, libre-office writer, zsh, emacs. Any help will be greatly appreciated. I'll gladly give you any other output you might need.

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  • Is there a way to HIDE a file/dir from a specific user/group?

    - by Iraklis
    I'm setting up ACL permissions in CENTOS. I'm getting close to the structure that I have in mind however one piece is missing for completing the puzzle. Is there any way to HIDE a file/directory from a specific user/group? I'm not talking about not being able to read, change dir to it. I want to completely hide it from the specific user/group (not to show up on ls -la).

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  • installing and running google-chrome on an old Ubuntu 7.10 legacy system

    - by 12632
    I am trying to get google-chrome to work on Ubuntu 7.10. I installed it with --force-depends and got it to install, but now when I try to run it, I get this error: /usr/bin/google-chrome: error while loading shared libraries: libnss3.so: cannot open shared object file: No such file or directory Is there a way to still get google-chrome to load even without this dependency satisfied? This is an old system that needs to keep this old 7.10 Ubuntu version and I would like to have google-chrome if possible installed, even if it means no sound or other features that are not compatible.

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  • strange behaviour - dhclient needs to be run twice in order to connect to wireless

    - by splicer
    I am trying to connect my to my wlan without the use of NetworkManager. I run the following commands after boot: iwconfig wlan0 enc <WEP passwd> mode managed essid <name> channel 6 ifconfig wlan0 up dhclient wlan0 At this point, dhclient stalls for ages (perhaps 2 minutes), then it returns with PING 192.168.1.254 (192.168.1.254) from 192.168.1.65 wlan0: 56(84) bytes of data. --- 192.168.1.254 ping statistics --- 3 packets transmitted, 0 received, +3 errors, 100% packet loss, time 3000ms pipe 3 .. The strange thing is that when I run pkill dhclient; dhclient wlan0 right after this, it connects in about <3 seconds. Any idea what could be the cause of this problem? Edit: oh, and I did try using the -timeout flag on dhclient but that didn't seem to make any difference (it still stalled for ages).

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  • Remotely accessing the openfire installed on fedora machine

    - by KItis
    HI , I have installed Openfire on fedora machine. i can start the openfire on this machine and it runs on the localhost. But i can not access openfire remotly as follows http://xxx.xxx.xxx.xxx:9090 i have desabled ip tables on this computer also when i do telnet for port 9090 on the localhost , it works could some one help me to get this working Thanks in advance for any help

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  • Why is scp not overwriting my destination file?

    - by Noli
    I'm trying to back up a file via the command scp /tmp/backup.tar.gz hostname:/home/user/backup.tar.gz When I run it, the scp progress bar shows up and it looks like its transferring the file, however when I log into the destination server to check the file, the timestamp and filesize haven't changed from the older version, so it looks like scp didn't overwrite the old file at all. It only sees to work when I manually delete the file from the destination server. I'm running ubuntu, and this is happening on two servers: one cygwin ssh, and one fedora core 3. Anyone have any idea why this is happening? I thought scp would ONLY overwrite existing files.. Thanks

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  • Can I mark a folder as mountpoint-only?

    - by Collin
    I have a folder ~/nas which I usually use sshfs to mount a network drive on. Today, I didn't realize the share hadn't been mounted yet, and copied some data into it. It took me a bit to realize that I'd just copied data into my own local drive rather than the network share. Is there some way to mark in the system that this folder is supposed to be a mount point, and to not let anyone copy data into it? I tried the permissions solution here: How to only allow a program to write to a directory if it is mounted?, but if I don't have write access I also can't mount anything to it.

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  • Disk Partitioning problem with fdisk.

    - by MA1
    Currently i am using fdisk to create/resize windows partitions. Following is a sample input script to fdisk to create/resize windows partitions: fdisk /dev/sda < partInput the contents of partInput are as follows: d #delete the partition 3 #partition number to be deleted n #add a new partition p #primary: type of new partition 3 #new partition number 18804 #start cylinder of new partition 77433 #end cylinder of new partition t #change the type of partition 3 #partition number whose type(filesystem) is to be changed 7 #HPFS/NTFS: partition type(filesystem) n #add a new partition p #primary: type of partition 77434 #first cylinder of new partition 77825 #end cylinder new partition w #write all the above changes As you see in the above input we are using cylinders for start and end. Earlier i am using sectors as unit and everything is working fine but getting problems when partitioning a 1.5TB hard drive. Then i changed the unit to cylinders but it is working on some machines not all. On some machines fdisk failed to create the partition table correctly. So, i am thinking to move to parted if there is no way to do the above using fdisk. Please also tell me how to correctly convert sectors to cylinders? How to perform all the above steps using parted without losing the data OR how to use fdisk correctly?

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  • Failed to configure CA certificate chain

    - by kron
    Hi All, I'm trying to setup SSL on fedora with apache. In my vhost... SSLCertificateFile /your/path/to/crt.crt SSLCertificateKeyFile /your/path/to/key.key SSLCertificateChainFile /your/path/to/DigiCertCA.crt I had it working fine with a self signed key, but can't get it to work with the DigiCertCA crt. When I run service httpd restart It fails to start. This is what I get in the logs... [Sat Jan 29 07:57:13 2011] [notice] suEXEC mechanism enabled (wrapper: /usr/sbin/suex$ [Sat Jan 29 07:57:13 2011] [error] Failed to configure CA certificate chain! Any assistance would be really appreciated! Thanks

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  • How to debug a kernel created using ubuntu-vm-builder?

    - by user265592
    Aim: Trying to perform a code walkthrough of what functions are getting called for sending and receiving packets over the network. I am building a kernel and using gdb for debugging/ tracing purposes. I have build a vm using the following command : time sudo ubuntu-vm-builder qemu precise --arch 'amd64' --mem '1024' --rootsize '4096' --swapsize '1024' --kernel-flavour 'generic' --hostname 'ubuntu' --components 'main' --name 'Bob' --user 'ubuntu' --pass 'ubuntu' --bridge 'br0' --libvirt 'qemu:///system' And I can run the VM successfully in qemu using the following command: qemu-system-x86_64 -smp 1 -drive file=tmpGgEOzK.qcow2 "$@" -net nic -net user -serial stdio -redir tcp:2222::22 Now, I want to debug the kernel using gdb. For this I need an executable with debug symbols(vmlinux), which apparently I don't have, as the vm-builder never asked for any such options and simply created a .qcow2 file. Question 1: Am I taking the correct approach to solve the problem and is there an easier way to do it? Question 2: Is there a way to debug this kernel using GDB? P.S: I don't have hardware support for KVM. Please correct me if I am wrong. Thanks.

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  • Subdomains not working with virtual hosts on apache2 ubuntu

    - by cy834sh4rk
    I'm trying to set up a subdomain on my ec2 account but can't figure out what's going on. I've looked for a few hours and haven't been able to find an answer :-/ I'm trying to set up a subdomain using virtual hosts but no matter what I try the browser can't find the subdomain :-( I have the following vhosts files set up: apache2/sites-available/mysite (this site currently works) <VirtualHost *:80 ServerName mysite.com ServerAdmin webmaster@localhost DocumentRoot /home/sites/mysite <Directory /home/sites/mysite Options Indexes FollowSymLinks MultiViews AllowOverride All Order allow,deny allow from all </Directory ErrorLog ${APACHE_LOG_DIR}/mysite-error.log LogLevel warn CustomLog ${APACHE_LOG_DIR}/mysite-access.log combined </VirtualHost apache2/sites-available/red (this is the subdomain I'm trying to set up) <VirtualHost *:80 ServerName red.mysite.com ServerAdmin webmaster@localhost DocumentRoot /var/www/red <Directory /var/www/red Options Indexes FollowSymLinks MultiViews AllowOverride All Order allow,deny allow from all </Directory ErrorLog ${APACHE_LOG_DIR}/red-error.log LogLevel warn CustomLog ${APACHE_LOG_DIR}/red-access.log combined </VirtualHost Apache mod_rewrite is enabled. I've enabled both sites using a2ensite and I make sure I restart apache every time I make a change. /etc/hosts 127.0.0.1 localhost 127.0.0.1 mysite.com 127.0.0.1 red.mysite.com Any help would be appreciated. Thanks!

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  • DNS issue on Fedora 12? wget wordpress.org fails where wget www.google.com works

    - by Tom Auger
    I'm administering a Fedora 12 box, but am quite new to networking specifics. Recently one of our WordPress apps hosted on our server has stopped being able to perform its auto-update or auto-download of plugins. Investigating further, I have tried the following: $ wget wordpress.org --2010-12-17 11:26:50-- http://wordpress.org/ Resolving wordpress.org... failed: Temporary failure in name resolution. wget: unable to resolve host address âwordpress.orgâ Whereas: $ wget www.google.com --2010-12-17 11:27:26-- http://www.google.com/ Resolving www.google.com... 74.125.226.82, 74.125.226.84, 74.125.226.80, ... Connecting to www.google.com|74.125.226.82|:80... connected. HTTP request sent, awaiting response... 302 Found Location: http://www.google.ca/ [following] --2010-12-17 11:27:26-- http://www.google.ca/ Resolving www.google.ca... 173.194.32.104 Connecting to www.google.ca|173.194.32.104|:80... connected. HTTP request sent, awaiting response... 200 OK Length: unspecified [text/html] Saving to: âindex.html.4â [ <=> ] 9,079 --.-K/s in 0.02s 2010-12-17 11:27:26 (462 KB/s) - âindex.html.4â Interestingly: $ ping wordpress.org PING wordpress.org (72.233.56.138) 56(84) bytes of data. 64 bytes from wordpress.org (72.233.56.138): icmp_seq=1 ttl=50 time=81.5 ms 64 bytes from wordpress.org (72.233.56.138): icmp_seq=2 ttl=50 time=67.3 ms ^C --- wordpress.org ping statistics --- 2 packets transmitted, 2 received, 0% packet loss, time 1783ms rtt min/avg/max/mdev = 67.361/74.448/81.536/7.092 ms and $ nslookup wordpress.org Server: 192.168.2.1 Address: 192.168.2.1#53 Non-authoritative answer: Name: wordpress.org Address: 72.233.56.138 Name: wordpress.org Address: 72.233.56.139 nscd has been stopped and flushed. iptables appear to be clean. At this point I have exhausted my limited abilities to diagnose the issue. Can anyone suggest a resolution path?

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  • A decent S3 bucket manager for Ubuntu

    - by Luke
    I'm looking for a decent S3 bucket manager for Ubuntu (Gnome). I prefer it to integrate with Nautilus so it will look like just any other drive (a la WebDAV) but so far I haven't been able to find anything that I'd like to use on a daily basis. What bucket managers do you use for Ubuntu or what bucket manager would you recommend? UPDATE: S3FS seems to be what I'd really want to use since it lets me integrate my buckets directly into my file-system. However, when trying S3FS I do not get the impression that it's ready for prime time. I'm stunned by the fact that there are no decent bucket managers out there for Ubuntu/Gnome, guess I have to build it myself...

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