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  • Referencing groups/classes from Puppet dashboard in my site manifest

    - by Banjer
    I'm using Puppet Dashboard as my ENC and I'm not sure how to reference or use class and group classifications from /etc/puppet/manifests/site.pp. I have two groups defined in the dashboard: CentOS6 and SLES11. What should my site.pp look like if I want to include a certain list of modules in the CentOS6 group and a certain list of modules in the SLES11 group? I'm trying to do something like this: # /etc/puppet/manifests/site.pp node basenode { include hosts include ssh::server include ssh::client include authentication include sudo include syslog include mail } node 'CentOS6' inherits basenode { include profile } node 'SLES11' inherits basenode { include usrmounts } I have OS-specific case statements within my modules, but there are some modules that will only be applied to a certain distro. So I suppose I have two questions: Is this the best way to apply modules/resources in an OS-specific manner? Or does the above make you want to vomit? Regardless of #1, I'm still curious as how to reference classes, groups, and nodes from Dashboard within my manifests. I've read the External Nodes doc, but I'm not seeing how they correspond to manifests. Thanks all.

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  • Pattern matching gnmap fields with SED

    - by Ovid
    I am testing the regex needed for creating field extraction with Splunk for nmap and think I might be close... Example full line: Host: 10.0.0.1 (host) Ports: 21/open|filtered/tcp//ftp///, 22/open/tcp//ssh//OpenSSH 5.9p1 Debian 5ubuntu1 (protocol 2.0)/, 23/closed/tcp//telnet///, 80/open/tcp//http//Apache httpd 2.2.22 ((Ubuntu))/, 10000/closed/tcp//snet-sensor-mgmt/// OS: Linux 2.6.32 - 3.2 Seq Index: 257 IP ID Seq: All zeros I've used underscore "_" as the delimiter because it makes it a little easier to read. root@host:/# sed -n -e 's_\([0-9]\{1,5\}\/[^/]*\/[^/]*\/\/[^/]*\/\/[^/]*\/.\)_\n\1_pg' filename The same regex with the escape characters removed: root@host:/# sed -n -e 's_\([0-9]\{1,5\}/[^/]*/[^/]*//[^/]*//[^/]*/.\)_\n\1_pg' filename Output: ... ... ... Host: 10.0.0.1 (host) Ports: 21/open|filtered/tcp//ftp///, 22/open/tcp//ssh//OpenSSH 2.0p1 Debian 2ubuntu1 (protocol 2.0)/, 23/closed/tcp//telnet///, 80/open/tcp//http//Apache httpd 5.4.32 ((Ubuntu))/, 10000/closed/tcp//snet-sensor-mgmt/// OS: Linux 9.8.76 - 7.3 Seq Index: 257 IPID Seq: All zeros ... ... ... As you can see, the pattern matching appears to be working - although I am unable to: 1 - match on both the end of line ( comma , and white/tabspace). The last line contains unwanted text (in this case, the OS and TCP timing info) and 2 - remove any of the un-necessary data - i.e. print only the matching pattern. It is actually printing the whole line. If i remove the sed -n flag, the remaining file contents are also printed. I can't seem to locate a way to only print the matched regex. Being fairly new to sed and regex, any help or pointers is greatly appreciated!

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  • I have added a port to the public zone in firewalld but still can't access the port

    - by mikemaccana
    I've been using iptables for a long time, but have never used firewalld until recently. I have enabled port 3000 TCP via firewalld with the following command: # firewall-cmd --zone=public --add-port=3000/tcp --permanent However I can't access the server on port 3000. From an external box: telnet 178.62.16.244 3000 Trying 178.62.16.244... telnet: connect to address 178.62.16.244: Connection refused There are no routing issues: I have a separate rule for a port forward from port 80 to port 8000 which works fine externally. My app is definitely listening on the port too: Proto Recv-Q Send-Q Local Address Foreign Address State User Inode PID/Program name tcp 0 0 0.0.0.0:3000 0.0.0.0:* LISTEN 99 36797 18662/node firewall-cmd doesn't seem to show the port either - see how ports is empty. You can see the forward rule I mentioned earlier. # firewall-cmd --list-all public (default, active) interfaces: eth0 sources: services: dhcpv6-client ssh ports: masquerade: no forward-ports: port=80:proto=tcp:toport=8000:toaddr= icmp-blocks: rich rules: However I can see the rule in the XML config file: # cat /etc/firewalld/zones/public.xml <?xml version="1.0" encoding="utf-8"?> <zone> <short>Public</short> <description>For use in public areas. You do not trust the other computers on networks to not harm your computer. Only selected incoming connections are accepted.</description> <service name="dhcpv6-client"/> <service name="ssh"/> <port protocol="tcp" port="3000"/> <forward-port to-port="8000" protocol="tcp" port="80"/> </zone> What else do I need to do to allow access to my app on port 3000? Also: is adding access via a port the correct thing to do? Or should I make a firewalld 'service' for my app instead?

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  • Why are my socks proxies slow

    - by vps_newcomer
    I have a linux vps, and i have tried a few socks proxy setups to test their performance: All tests were using speedtest.net The standard ssh tunnel proxy 0.8mbit/s download and 0.1-0.2mbit/s upload speeds dante-server proxy 1.3mbit/s download and 0.4-0.5mbit/s upload I am wondering why are these speeds so slow? Is anything shaping them? Is it just the nature of socks proxies? I know that the ssh tunnel has to do encryption and what not so that is why its slow, but i was surprised to see that the second setup was also quite slow. On the VPS i have received download speeds of 25MB/s per second (thats about 200mbit/s and upload speed of atleast 5MB/s (haven't got a good enough pipe to test anything faster). The other option i was going to try is to setup OpenVPN and see how that goes, however i need to find a good tutorial as it's fairly complicated to setup. So why is it so slow? How can i test to see where the bottleneck is? How can i make it faster :D

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  • sharing a folder between linux and windows over the internet

    - by valya
    Hello Currently my job is to make websites with Django. I use many things like virtualenv, PIL, etc. The problem is, I can't stand Linux on my desktop. I like it on servers, It's greate to use it over the SSH. But for desktop? No way. But for the development Linux is quite essential. Of course almost everything is ported to Windows, but it's not as simple to use as in Linux. For example, Windows shell is awful in comparison with Linux. So I've tried Cygwin, but it's too damn slow. Every time django dev server reloads, it tooks almost 20-30 seconds. In comparison, then using "native" python on Windows or Linux, it reloads instantly. Even worse, Cygwin makes all my system very slow. I've been thinking about it and have thought up a way to go. I can share a folder with my application with some Linux box. The devserver and everything will run on that box, while I'll be happy editing files and running the browser on my Windows 7. SSH shell is much quickier and handy than Cygwin. Currently there are no Linux boxes in my home network (except for my android phone :) but I have several VDS boxes with Debian. So, how do I share a Windows folder with VDS box? I can't rely on my desktop IP but I can rely on the VDS's one. I need sharing to be as quick as possible (well, 2-3 seconds ping is OK) and "native" for both systems, so I could use a folder like a normal folder in both Windows and Linux.

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  • Compressing and copying large files on Windows Server?

    - by Aaron
    I've been having a hard time copying large database backups from the database server to a test box at another site. I'm open to any ideas that would help me get this database moved without having to resort to a USB hard drive and the mail. The database server is running Windows Server 2003 R2 Enterprise, 16 GB of RAM and two quad-core 3.0 GHz Xeon X5450s. Files are SQL Server 2005 backup files between 100 GB and 250 GB. The pipe is not the fastest and SQL Server backup files typically compress down to 10-40% of the original, so it made sense to me to compress the files first. I've tried a number of methods, including: gzip 1.2.4 (UnxUtils) and 1.3.12 (GnuWin) bzip2 1.0.1 (UnxUtils) and 1.0.5 (Cygwin) WinRAR 3.90 7-Zip 4.65 (7za.exe) I've attempted to use WinRAR and 7-Zip options for splitting into multiple segments. 7za.exe has worked well for me for database backups on another server, which has ~50 GB backups. I've also tried splitting the .BAK file first with various utilities and compressing the resulting segments. No joy with that approach either- no matter the tool I've tried, it ends up butting against the size of the file. Especially frustrating is that I've transferred files of similar size on Unix boxes without problems using rsync+ssh. Installing an SSH server is not an option for the situation I'm in, unfortunately. For example, this is how 7-Zip dies: H:\dbatmp>7za.exe a -t7z -v250m -mx3 h:\dbatmp\zip\db-20100419_1228.7z h:\dbatmp\db-20100419_1228.bak 7-Zip (A) 4.65 Copyright (c) 1999-2009 Igor Pavlov 2009-02-03 Scanning Creating archive h:\dbatmp\zip\db-20100419_1228.7z Compressing db-20100419_1228.bak System error: Unspecified error

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  • Specify default group and permissions for new files in a certain directory

    - by mislav
    I have a certain directory in which there is a project shared by multiple users. These users use SSH to gain access to this directory and modify/create files. This project should only be writeable to a certain group of users: lets call it "mygroup". During an SSH session, all files/directories created by the current user should by default be owned by group "mygroup" and have group-writeable permissions. I can solve the permissions problem with umask: $ cd project $ umask 002 $ touch test.txt File "test.txt" is now group-writeable, but still belongs to my default group ("mislav", same as my username) and not to "mygroup". I can chgrp recursively to set the desired group, but I wanted to know is there a way to set some group implicitly like umask changes default permissions during a session. This specific directory is a shared git repo with a working copy and I want git checkout and git reset operations to set the correct mask and group for new files created in the working copy. The OS is Ubuntu Linux. Update: a colleague suggests I should look into getfacl/setfacl of POSIX ACL but the solution below combined with umask 002 in the current session is good enough for me and is much more simple.

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  • iptables-restore: line 1 failed

    - by Doug
    Hello, I am new to servers, and I was following this guide and it failed on the first command instructed. Could anyone give me a hand? http://wiki.debian.org/iptables ~ZORO~:/etc# iptables-restore < /etc/iptables.test.rules iptables-restore: line 1 failed Edit: iptables.test.rules ~ZORO~:/etc# cat /etc/iptables.test.rules *filter # Allows all loopback (lo0) traffic and drop all traffic to 127/8 that doesn't use lo0 -A INPUT -i lo -j ACCEPT -A INPUT -i ! lo -d 127.0.0.0/8 -j REJECT # Accepts all established inbound connections -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT # Allows all outbound traffic # You could modify this to only allow certain traffic -A OUTPUT -j ACCEPT # Allows HTTP and HTTPS connections from anywhere (the normal ports for websites) -A INPUT -p tcp --dport 80 -j ACCEPT -A INPUT -p tcp --dport 443 -j ACCEPT # Allows SSH connections for script kiddies # THE -dport NUMBER IS THE SAME ONE YOU SET UP IN THE SSHD_CONFIG FILE -A INPUT -p tcp -m state --state NEW --dport 30000 -j ACCEPT # Now you should read up on iptables rules and consider whether ssh access # for everyone is really desired. Most likely you will only allow access from certain IPs. # Allow ping -A INPUT -p icmp -m icmp --icmp-type 8 -j ACCEPT # log iptables denied calls (access via 'dmesg' command) -A INPUT -m limit --limit 5/min -j LOG --log-prefix "iptables denied: " --log-level 7 # Reject all other inbound - default deny unless explicitly allowed policy: -A INPUT -j REJECT -A FORWARD -j REJECT COMMIT

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  • rsync general question

    - by CaptnLenz
    I'm trying to use rsync. At first, everything looks very good: rsync -Pniahv -e ssh /home/xxx/Videos/ [email protected]:"/shares/Public/Shared\ Videos/" --stats ... <f+++++++++ Serien/blah.avi <f+++++++++ Serien/blah S01E01 <f+++++++++ Serien/blah - S01E02 <f+++++++++ Serien/blah - S01E03 <f+++++++++ Serien/blah - S01E04 <f+++++++++ Serien/blah - S01E05 <f+++++++++ Serien/blah - S01E06 <f+++++++++ Serien/blah - S01E07 ... Number of files: 232 Number of files transferred: 223 Total file size: 118.24G bytes Total transferred file size: 117.51G bytes Literal data: 0 bytes Matched data: 0 bytes File list size: 9.46K File list generation time: 0.001 seconds File list transfer time: 0.000 seconds Total bytes sent: 10.18K Total bytes received: 712 After that, i copied some of the files manually and runned rsync again in dry mode: rsync -Pniahv -e ssh /home/xxx/Videos/ [email protected]:"/shares/Public/Shared\ Videos/" --stats ... <f..tpo.... Serien/blah.avi <f..tpo.... Serien/blah S01E01 <f..tpo.... Serien/blah - S01E02 <f..tpo.... Serien/blah - S01E03 <f..tpo.... Serien/blah - S01E04 <f..tpo.... Serien/blah - S01E05 <f..tpo.... Serien/blah - S01E06 <f..tpo.... Serien/blah - S01E07 ... Number of files: 232 Number of files transferred: 223 Total file size: 118.24G bytes Total transferred file size: 117.51G bytes Literal data: 0 bytes Matched data: 0 bytes File list size: 9.46K File list generation time: 0.001 seconds File list transfer time: 0.000 seconds Total bytes sent: 10.18K Total bytes received: 712 Why hasn't changed something in the --stats, although only the permissions and the timestamp have to be updated and not the full files need to be copied?

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  • x86_64 and memory issues

    - by Valery
    Recently I've switched from ubuntu 32bit to 64bit version. And now I experiencing some problems. All application take twice more memory. And some application takes even more. For example sshd on new server: root 6608 0.0 0.0 67972 2912 ? Ss 14:43 0:00 sshd: deploy [priv] deploy 6616 0.0 0.0 67972 1724 ? S 14:43 0:00 sshd: deploy@pts/4 root 20892 0.0 0.0 50916 1160 ? Ss 15:53 0:00 /usr/sbin/sshd root 21170 0.0 0.0 67972 2912 ? Ss 15:56 0:00 sshd: deploy [priv] deploy 21173 0.0 0.0 67972 1728 ? S 15:56 0:00 sshd: deploy@pts/0 root 23802 0.0 0.0 67972 2912 ? Ss 16:08 0:00 sshd: deploy [priv] deploy 23804 0.0 0.0 67972 1724 ? S 16:08 0:00 sshd: deploy@pts/1 root 24570 0.0 0.0 67972 2908 ? Ss 12:45 0:00 sshd: deploy [priv] deploy 24573 0.0 0.0 68112 1804 ? S 12:45 0:00 sshd: deploy@pts/3 deploy 25014 0.0 0.0 5168 852 pts/0 S+ 16:13 0:00 grep ssh the same on the old server: root 4867 0.0 0.0 5312 1028 ? Ss Mar23 0:00 /usr/sbin/sshd root 23753 0.0 0.0 8052 2556 ? Ss 16:15 0:00 sshd: deploy [priv] deploy 23755 0.0 0.0 8052 1524 ? S 16:15 0:00 sshd: deploy@pts/0 deploy 23770 0.0 0.0 3004 748 pts/0 D+ 16:15 0:00 grep ssh The same problems with postfix, nginx and some other application.

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  • Looking for suitable backup solution Mac OS X to offsite Centos 6 server 1TB of working data

    - by Brady
    I'll start by saying what we have in place currently: On site file server (Mac OS X Server) that is used by GFX designers and they have a working 1TB of data. Offsite server with 2TB available storage (Centos 6) Mac OS X server rsync data to offsite server every 6 hours (rsync -avz --delete --progress -e ssh ...) Mac OS X server does full data backup to LTO 4 tape on a 10 day recycle (Mon-Fri for 2 weeks) rsync pushes about 60GB of file changes a day. The problem: The onsite tape backup is failing as 1TB of graphics files don't compress well to fit onto a 800GB LTO4 tape. Backup is incredibly slow doing a full backup. Pain in the backside getting people to remember to change the tape. Often gets forgotten etc The quick solution: Buy LTO5 Drive and tapes. However this has been turned down because of the cost... What I would like: Something that works in the same way rysnc works. Only changed data is sent over the wire and can be scheduled to run multiple times during the day. Data that is sent is compressed and sent over SSH. Something that keeps a 14day retention but doesn't keep duplicate data So as an example if I have 1TB of working data and 60GB of changes are made each day then I expect around 1.84TB of data to be stored on the offsite server. To work with the Mac OS X server and Centos 6 server. Not cost an arm and a leg. Must be a cheaper solution than buying an LTO5 drive with tapes (around £1500). Be able to be setup to run autonomously. Have some sort of control panel that will allow an admin to easily restore a file/folder. Any recommendations?

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  • What does a connection timeout indicate when performing an NFS mount?

    - by DeeDee
    We have a shiny new QNAP NAS (TS-879U-RP), and I'm trying to mount it to our big ol' RHEL server in the same manner as our other two QNAP NAS devices. The IT department won't give me the root privileges to the NAS, so I can't SSH in (I know, I know). The first thing I did was to, via the QNAP web admin interface, create a network share named "Runs." I then added the IP of the RHEL server to the permissions list: On the RHEL server, I then added the following line to /etc/fstab: [IP of NAS]:/Runs /mnt/gsrnas3 nfs defaults 0 0 Aside from the IP and the specific mount directory name, this is how I mounted the other two NAS devices. I then created the gsrnas3 directory under /mnt/, and then ran `mount /mnt/gsrnas3' I got the following error: mount.nfs: Connection timed out My first thought is that it's a ports issue, but I don't have enough specific experience with this issue to know for sure. I have two other NAS devices by the same manufacturer already mounted to this RHEL server, so that leads me to believe the configuration issue is on the NAS side of things. I can ping the NAS device successfully from the RHEL server. Not being able to SSH into said NAS is a huge hassle, though. Any ideas?

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  • Managing Linux Directory Permissions & SFTP

    - by Dizzle
    Good morning; I have a RHEL 5.7 web server configured to allow SSH/SFTP only by specific groups. I'd like for content managers to upload content to their respective directories and have that content inherit the user/group ownership of the directory regardless of upload method or application. For example: John is in group "web" for SSH/SFTP rights and "finance" for directory permissions, and uploads to directory "webstuff" via SFTP. Directory "webstuff" has permissions of "2760" (rwxrws---), and ownership of "apache:finance". If John uploads an update to an existing file in "webstuff", the ownership of the file stays at "apache:finance". If John uploads a new file to "webstuff", the ownership of the file is "john:finance". My desire is to have any file from John uploaded to "webstuff" to change to the directory's owner. I've tried with setuid and setgid both set, but the user-ownership didn't take. I've seen mentions on ServerFault of using ACL's, or a chrooted jail for SFTP but I have yet to configure and test them, and I don't know if they're a viable solution (they could be, I just don't know because I've never done either). Any thoughts and assistance would be greatly appreciated.

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  • Ubuntu Postfix email account with forward

    - by Mika
    I have an Ubuntu 12.04 server with Postfix installed. In Postfix installation I used this guide https://help.ubuntu.com/community/Postfix. I didn't go through all of that, just the sudo dpkg-reconfigure postfix part. I have created user accounts to my server and the users home directories contain a .forward file which have only one row the email address to forward to. I have defined dns A records for the names www.mydomain.com and mydomain.com But if I send an email to [email protected] it doesn't get forwarded. Actually I can't see any sign about any email ever visiting my server. My firewall is defined to allow incoming traffic for ports 80, 443 and 22. For outgoing traffic it allows ports 587 and 22. The exact definitions are below. Should I allow also outgoing http (port 80)? or maybe port 25? # Allow ssh in iptables -A INPUT -i eth0 -p tcp --dport 22 -m state --state NEW,ESTABLISHED -j ACCEPT iptables -A OUTPUT -o eth0 -p tcp --sport 22 -m state --state ESTABLISHED -j ACCEPT # Allow incoming HTTP iptables -A INPUT -i eth0 -p tcp --dport 80 -m state --state NEW,ESTABLISHED -j ACCEPT iptables -A OUTPUT -o eth0 -p tcp --sport 80 -m state --state ESTABLISHED -j ACCEPT # Allow incoming HTTPS iptables -A INPUT -i eth0 -p tcp --dport 443 -m state --state NEW,ESTABLISHED -j ACCEPT iptables -A OUTPUT -o eth0 -p tcp --sport 443 -m state --state ESTABLISHED -j ACCEPT # Allow outgoing SSH iptables -A OUTPUT -o eth0 -p tcp --dport 22 -m state --state NEW,ESTABLISHED -j ACCEPT iptables -A INPUT -i eth0 -p tcp --sport 22 -m state --state ESTABLISHED -j ACCEPT # Allow outgoing emails iptables -A OUTPUT -o eth0 -p tcp --dport 587 -m state --state NEW,ESTABLISHED -j ACCEPT iptables -A INPUT -i eth0 -p tcp --sport 587 -m state --state ESTABLISHED -j ACCEPT Edits: I found lines from my syslog telling me that there were incoming traffic for port 25 which was blocked. The sender ip's for those packages were trustworthy, so I opened also port 25. Now I can see some Postfix logging in my syslog. It looks like it is at least trying to forward emails. I haven't yet received any forwarder emails into my gmail mail box.

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  • IP-dependent local port-forwarding on Linux

    - by chronos
    I have configured my server's sshd to listen on a non-standard port 42. However, at work I am behind a firewall/proxy, which only allow outgoing connections to ports 21, 22, 80 and 443. Consequently, I cannot ssh to my server from work, which is bad. I do not want to return sshd to port 22. The idea is this: on my server, locally forward port 22 to port 42 if source IP is matching the external IP of my work's network. For clarity, let us assume that my server's IP is 169.1.1.1 (on eth1), and my work external IP is 169.250.250.250. For all IPs different from 169.250.250.250, my server should respond with an expected 'connection refused', as it does for a non-listening port. I'm very new to iptables. I have briefly looked through the long iptables manual and these related / relevant questions: http://serverfault.com/questions/57872/iptables-question-forwarding-port-x-to-an-ssh-port-of-different-machine-on-the-n http://serverfault.com/questions/140622/how-can-i-port-forward-with-iptables However, those questions deal with more complicated several-host scenarios, and it is not clear to me which tables and chains I should use for local port-forwarding, and if I should have 2 rules (for "question" and "answer" packets), or only 1 rule for "question" packets. So far I have only enabled forwarding via sysctl. I will start testing solutions tomorrow, and will appreciate pointers or maybe case-specific examples for implementing my simple scenario. Is the draft solution below correct? iptables -A INPUT [-m state] [-i eth1] --source 169.250.250.250 -p tcp --destination 169.1.1.1:42 --dport 22 --state NEW,ESTABLISHED,RELATED -j ACCEPT Should I use the mangle table instead of filter? And/or FORWARD chain instead of INPUT?

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  • NAT vs public IP (and blocked ports)

    - by user1646166
    I have a problem with my ISP. They say that they don't block any ports and I have public IP, while I think these both statements are false. Before I talk to them again (which is really tough when my understanding of these terms is different than theirs) I would like to make some things clear. It seems like my computer is behind NAT (is it possible to have public IP and be behind NAT at the same moment?). When I check my IP, through some external server, and type that IP into browser I get a home page of some router (not mine). Isn't that a proof that my IP isn't public? Also, I have problems with making connections via some ports. E.g. when I'm trying to connect through some high port ( 1023) via SSH, it doesn't work. Is it possible that certain range of outgoing ports from my computer are blocked? Or is it simply because that my ssh client (PuTTY) can't receive incoming packets because of blocked incoming ports? To avoid some questions: it's not a problem with my router, I tried connecting my PC directly and it also didn't work, while having connected by 3G using phone with USB tethering, it does work. Thanks!

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  • EC2 instance is blocking all outbound connections, how to diagnose/fix?

    - by Fraggle
    My EC2 instance is blocking all outbound connections. wget http://www.google.com ==> Hangs ping google.com ==>hangs ssh user@anyserver ==>hangs I ran : sudo iptables -F to eliminate all rules to no avail AWS Management console shows Security Group for that instance has Inbound rule allowing ssh and port 80. Can't find anything about Outbound rules there. Rebooted instance, no change. If anyone knows how to diagnose or fix, please help. Adding info: [ec2-user@ip-10-112-62-73 ~]$ ifconfig eth0 Link encap:Ethernet HWaddr 12:31:3D:06:31:BB inet addr:10.112.62.73 Bcast:10.112.63.255 Mask:255.255.254.0 inet6 addr: fe80::1031:3dff:fe06:31bb/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:1933 errors:0 dropped:0 overruns:0 frame:0 TX packets:1764 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:164075 (160.2 KiB) TX bytes:343256 (335.2 KiB) Interrupt:9 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:8 errors:0 dropped:0 overruns:0 frame:0 TX packets:8 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:672 (672.0 b) TX bytes:672 (672.0 b) [ec2-user@ip-10-112-62-73 ~]$ ip route show 10.112.62.0/23 dev eth0 proto kernel scope link src 10.112.62.73 default via 10.112.62.1 dev eth0

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  • Ubuntu Pound Reverse Proxy Load Balancing Based off active server load?

    - by Andrew
    I have Pound installed on a loadbalancer. It seems to work okay, except that it randomly assigns the backend server to forward the request to. I've put 1 backend machine under so much load that it went into using swap, and I can't even ssh into it to test this scenareo. I would like the loadbalancer to realize that the machine is overloaded, and send it to a different backend machine. However it doesn't. I've read the man page and it seems like the directive "DynScale 1" is what would monitor this, but it still redirects to the overloaded server. I've also put in "HAport 22" to the backend figuring since I can't ssh in, neither could the loadbalancer and it would consider the backend server dead until it gets rid of the load and responds, but that didn't help either. If anyone could help with this, I'd appreciate it. My current config is below. ###################################################################### ## global options: User "www-data" Group "www-data" #RootJail "/chroot/pound" ## Logging: (goes to syslog by default) ## 0 no logging ## 1 normal ## 2 extended ## 3 Apache-style (common log format) LogLevel 3 ## check backend every X secs: Alive 5 DynScale 1 Client 1200 TimeOut 1500 # poundctl control socket Control "/var/run/pound/poundctl.socket" ###################################################################### ## listen, redirect and ... to: ## redirect all requests on port 80 to SSL ListenHTTP Address 192.168.1.XX Port 80 Service Redirect "https://xxx.com/" End End ListenHTTPS Address 192.168.1.XX Port 443 Cert "/files/www.xxx.com.pem" Service BackEnd Address 192.168.1.1 Port 80 HAport 22 End BackEnd Address 192.168.1.2 Port 80 HAport 22 End End End

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  • How to grant read/write to specific user in any existent or future subdirectory of a given directory? [migrated]

    - by Samuel Rossille
    I'm a complete newbie in system administration and I'm doing this as a hobby. I host my own git repository on a VPS. Let's say my user is john. I'm using the ssh protocol to access my git repository, so my url is something like ssh://[email protected]/path/to/git/myrepo/. Root is the owner of everything that's under /path/to/git I'm attempting to give read/write access to john to everything which is under /path/to/git/myrepo I've tried both chmod and setfacl to control access, but both fail the same way: they apply rights recursively (with the right options) to all the current existing subdirectories of /path/to/git/myrepo, but as soon as a new directory is created, my user can not write in the new directory. I know that there are hooks in git that would allow me to reapply the rights after each commit, but I'm starting to think that i'm going the wrong way because this seems too complicated for a very basic purpose. Q: How should I setup my right to give rw access to john to anything under /path/to/git/myrepo and make it resilient to tree structure change ? Q2: If I should take a step back change the general approach, please tell me.

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  • Amazon EC2 instance missing Network Interface

    - by Sergiks
    I am running Linux on a t1.micro instance at Amazon EC2. Once I noticed bruteforce ssh login attemtps from a certain IP, after litle Googling I issued the two following commands (other ip): iptables -A INPUT -s 202.54.20.22 -j DROP iptables -A OUTPUT -d 202.54.20.22 -j DROP Either this, or maybe some other actions like yum upgrade perhaps, caused the follwing fiasco: after rebooting the server, it came up without the Network Interface! I only can connect to it through AWS Management Console JAVA ssh client - via local 10.x.x.x address. Console's Attach Network Interface as well as Detach.. are greyed out for this instance. Network Interfaces item at the left does not offer any Subnets to choose from, to create a new N.I. Please advice, how can I recreate a Network Interface for the instance? Upd. The instance is not accessible from outside: cannot be pinged, SSH'ed or connected by HTTP on port 80. Here's the ifconfig output: eth0 Link encap:Ethernet HWaddr 12:31:39:0A:5E:06 inet addr:10.211.93.240 Bcast:10.211.93.255 Mask:255.255.255.0 inet6 addr: fe80::1031:39ff:fe0a:5e06/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:1426 errors:0 dropped:0 overruns:0 frame:0 TX packets:1371 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:152085 (148.5 KiB) TX bytes:208852 (203.9 KiB) Interrupt:25 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b) What is also unusual: a new micro instance I created from scratch, with no relation to the troubled one, was not pingable too.

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  • What is the ip range of EC2

    - by Nicolas Kassis
    I'd like to setup a rule to block ssh request from EC2 since I've been seeing a large amount of ssh based attack from there and was wondering if anyone knew what their IP ranges are. EDIT: Thank you for the answer, I went ahead and implemented the iptables rules as follow. I ignore all traffic for the moment. Logging it just to see if the rules are working and for stats on how much crap EC2 is sending out ;) #EC2 Blacklist $IPTBLS -A INPUT -s 67.202.0.0/18 -j LOG --log-prefix "<firewall> EC2 traffic " $IPTBLS -A INPUT -s 67.202.0.0/18 -j DROP $IPTBLS -A INPUT -s 72.44.32.0/19 -j LOG --log-prefix "<firewall> EC2 traffic " $IPTBLS -A INPUT -s 72.44.32.0/19 -j DROP $IPTBLS -A INPUT -s 75.101.128.0/17 -j LOG --log-prefix "<firewall> EC2 traffic " $IPTBLS -A INPUT -s 75.101.128.0/17 -j DROP $IPTBLS -A INPUT -s 174.129.0.0/16 -j LOG --log-prefix "<firewall> EC2 traffic " $IPTBLS -A INPUT -s 174.129.0.0/16 -j DROP $IPTBLS -A INPUT -s 204.236.192.0/18 -j LOG --log-prefix "<firewall> EC2 traffic " $IPTBLS -A INPUT -s 204.236.192.0/18 -j DROP $IPTBLS -A INPUT -s 204.236.224.0/19 -j LOG --log-prefix "<firewall> EC2 traffic " $IPTBLS -A INPUT -s 204.236.224.0/19 -j DROP $IPTBLS -A INPUT -s 79.125.0.0/17 -j LOG --log-prefix "<firewall> EC2 traffic " $IPTBLS -A INPUT -s 79.125.0.0/17 -j DROP

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  • How do you change a Cisco ASA 5510 management interface?

    - by Sam Sanders
    I want to add a redundant interface to my Cisco ASA 5510. The management interface is currently using Ethernet0/1 (10.1.25.254/24) one of the interface I want to use for the redundant interfaces. So I wanted to setup Management0/0 as the new management interface. The other interface I want to use is Ethernet0/2 (10.1.0.254/24) for the redundant interface. The Ethernet0/3 (10.1.251.5/24) interface is not going to be part of the redundant interface. I gave the Management0/0 an IP address of 10.1.254.5, and was able to connect a win7 box to Management0/0 and use 10.1.254.5 as a gateway; and ping another address on the (10.1.251.0/24) network, but I can't ping the interface (10.1.254.5) itself. I also can't use ASDM/SSH to log onto the ASA at 10.1.254.5. I setup rules in Configuration Device Management Management Access ASDM/HTTPS/Telnet/SSH. That look like the original rules for the Ethernet0/1 interface. The last thing I can think to try would be to change the Configuration Device Management Management Access Management Interface. I'm a bit nervous about changing it, the description of it is a bit vague. What it's going to do if I change it? What is the correct way to change a management interface?

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  • How do I format this regex so it will work in fail2ban?

    - by chapkom
    I've just installed fail2ban on my CentOS server in response to an SSH brute force attempt. The default regular expressions in fail2ban's sshd.conf file do not match any entries in audit.log, which is where SSH seems to be logging all connection attempts, so I am trying to add an expression that will match. The string I am trying to match is as follows: type=USER_LOGIN msg=audit(1333630430.185:503332): user pid=30230 uid=0 auid=500 subj=user_u:system_r:unconfined_t:s0-s0:c0.c1023 msg='acct="root": exe="/usr /sbin/sshd" (hostname=?, addr=<HOST IP>, terminal=sshd res=failed)' The regular expression I am attempting to use is: ^.*addr=<HOST>, terminal=sshd res=failed.*$ I've used regextester.com and regexr to try to build the regex. The testers give me a match for this regex:^.*addr=\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}, terminal=sshd res=failed.*$ but fail2ban-regex complains if I don't use the <HOST> tag in the regex. However, using ^.*addr=<HOST>, terminal=sshd res=failed.*$ gives me 0 matches. At this point, I am totally stuck and I would greatly appreciate any assistance. What am I doing wrong in the regex I am trying to use?

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  • dpkg broken while upgrading Debian Etch to Lenny

    - by artvolk
    Good day! While trying to recover a box to lenny it seems I've broken things. It upgrades libc and glib after that dpkg seems to be broken. I can run apt-get, but it gets segmentation fault from dpkg: # apt-get -f install Reading package lists... Done Building dependency tree... Done 0 upgraded, 0 newly installed, 0 to remove and 316 not upgraded. 9 not fully installed or removed. Need to get 0B of archives. After unpacking 0B of additional disk space will be used. /bin/sh: line 1: 4606 Segmentation fault /usr/sbin/dpkg-preconfigure --apt E: Sub-process /usr/bin/dpkg received a segmentation fault. I can login via SSH but even ls is not working: # ls Segmentation fault Is there anything I can do remotelly via SSH? # ldd /bin/ls linux-gate.so.1 => (0xffffe000) librt.so.1 => /lib/tls/i686/cmov/librt.so.1 (0xb7fc8000) libacl.so.1 => /lib/libacl.so.1 (0xb7fc2000) libselinux.so.1 => /lib/libselinux.so.1 (0xb7fac000) libc.so.6 => /lib/i686/cmov/libc.so.6 (0xb7e51000) libpthread.so.0 => /lib/tls/i686/cmov/libpthread.so.0 (0xb7e3f000) /lib/ld-linux.so.2 (0xb7fd8000) libattr.so.1 => /lib/libattr.so.1 (0xb7e3b000) libdl.so.2 => /lib/i686/cmov/libdl.so.2 (0xb7e37000) libsepol.so.1 => /lib/libsepol.so.1 (0xb7df6000) It seems I've temporary fixed it with: # touch /etc/ld.so.nohwcap From here: http://saintaardvarkthecarpeted.com/blog/archive/2005/08/_etc_ld_so_nohwcap.html

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  • VPN on a ubuntu server limited to certain ips

    - by Hultner
    I got an server running Ubuntu Server 9.10 and I need access to it and other parts of my network sometimes when not at home. There's two places I need to access the VPN from. One of the places to an static IP and the other got an dynamic but with DynDNS setup so I can always get the current IP if I want to. Now when it comes to servers people call me kinda paranoid but security is always my number one priority and I never like to allow access to the server outside the network therefor I have two things I have to have on this VPN. One it shouldn't be accessiable from any other IP then these 2 and two it has to use a very secure key so it will be virtually impossible to bruteforce even from the said IP´s. I have no experience what so ever in setting up VPNs, I have used SSH tunneling but never an actuall VPN. So what would be the best, most stable, safest and performance effiecent way to set this up on a Ubuntu Server? Is it possible or should I just set up some kind of SSH Tunnel instead? Thanks on beforehand for answers.

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