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  • iptables: Allow only HTTP access for web browsing

    - by user1448260
    Have a linux box, want it locked down but just be able to surf internet on it. Why is this script blocking http too? #!/bin/sh # # iptables -F # #Set default policies for INPUT, FORWARD and OUTPUT chains # iptables -P INPUT DROP iptables -P FORWARD DROP iptables -P OUTPUT DROP # # Allow TCP connections on tcp port 80 # 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 # # Set access for localhost # iptables -A INPUT -i lo -j ACCEPT # # List rules # iptables -L -v

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  • Can't boot from CD

    - by Jason Swett
    I installed Ubuntu on a PowerBook G4 and it only works about 10% of the time. For this reason I decided to re-install OS X, but my machine won't boot from CD. It also won't boot Ubuntu the vast majority of the time, so I'm kind of screwed. After a ton of tries, I finally got my machine to boot a Linux command line. Is there anything I can do at this point to make my machine more runnable, just for the sake of installing OS X?

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  • Can't boot from CD

    - by Jason Swett
    I installed Ubuntu on a PowerBook G4 and it only works about 10% of the time. For this reason I decided to re-install OS X, but my machine won't boot from CD. It also won't boot Ubuntu the vast majority of the time, so I'm kind of screwed. After a ton of tries, I finally got my machine to boot a Linux command line. Is there anything I can do at this point to make my machine more runnable, just for the sake of installing OS X?

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  • What's the correct SELinux type for a directory?

    - by unthar
    If I create a new filesystem/directory off of / and I set the Linux permissions to 770 I expect the group to be able to read and write files in that directory. SELinux was preventing me from doing this until I changed the SELinux type on that directory to public_content_rw_t. If this is just a directory in which users in that group will share files is this an acceptable SELinux type or should I be using another one? Writing a custom policy seems like overkill for these purposes. Thanks

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  • Dropbox to sync *nix home folders.

    - by Somebody still uses you MS-DOS
    I'm using a Linux machine at work, and started using at home in a VM for some home development. I have a vimrc and a bashrc with some configuration, that are useful for both machines. What is the best way to sync them? Create a symlink for each file in my home folder pointing out to a the respectives files in my Dropbox sync folder? Is this possible (delete .bashrc and create a symlink instead)?

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  • How to make spamassasin reject mail based on score?

    - by Kaizoku
    I am running linux with postfix, dovcot, postgrey and spamassasin/spamd. This is my main.cf smtpd_recipient_restrictions = permit_sasl_authenticated, permit_mynetworks, reject_unauth_destination, reject_invalid_hostname, reject_unauth_pipelining, reject_non_fqdn_sender, reject_unknown_sender_domain, reject_non_fqdn_recipient, reject_unknown_recipient_domain, check_policy_service inet:127.0.0.1:10030 I got spamassasin to add spam header to other emails that postfix didn't catch, but how to make it reject?

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  • How faster is using an internal IP address instead of an external one?

    - by user349603
    I have a mailing list application that sends emails through several dedicated SMTP servers (running Linux Debian 5 and Postfix) in the same network of a hosting company. However, the application is using the servers' external IP addresses in order to connect to them over SMTP, and I was wondering what kind of improvement would be obtained if the application used the internal IP addresses of the servers instead? Thank you in advance for your insight.

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  • gitk looks ugly / doesn't honor theme settings

    - by hasenj
    I'm running Xubuntu, (actually linux mint with xfce on top, but I suppose it's essentially the same thing) I set my appearance theme to (a modified version of) MurrinaStormCloud, but if I run gitk, it uses ugly font rendering, ugly colors, ugly widgets. I think tcl is the thing to blame here, but can I fix it? Here's a picture for comparison between what firefox looks like under the current theme and what gitk looks like:

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  • Create new vsftpd user and lock to (specify) home / login directory

    - by Geoff Jackson
    I need to periodically give temporary and limited access to various directories on a CentOS linux server that has vsftp installed. I've created a user using useradd [user_name] and given them a password using passwd [password]. I've created a directory in /var/ftp and then I bind this to the directory that I wish to limit access to. What else do I need to specifically do to ensure that when this user logs into FTP, they only have access to this directory please?

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  • Oracle Virtualbox on statically compiled kernel

    - by aking1012
    I can't seem to find any documentation on the subject. I'm working on putting together a linux install for a fairly "dirty" environment. Best practice there would be a statically compiled kernel with no module support. I can already do the customizations to strip out unnecessary drivers/etc to get the performance and disable module support. Does anyone have a link or any ideas on how to get the Oracle Virtualbox module (not the OSE one, I need USB passthrough) compiled in?

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  • Log viewer server and client

    - by Scott Crooks
    I'm looking for a log viewing solution for (mostly) Linux and (preferably) Windows too. I want to be able to centralize the log information for a lot of servers so that people in the company can see what's going on for different servers. I would guess this would involve having a central server which accepts information from the various computers / virtual machines with (perhaps) a running daemon on each of the servers. Does such a software exist?

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  • Why does pinging a local router return "Destination Host Unreachable"?

    - by Matt H
    I have two tomato routers. One is bridged wirelessly with the other. I have a new server on the network. It's running Ubuntu Server 11.04. They are all connected like this: A - Linux PC B - New Server C - Mac Mini D - Macbook T1 - Tomato 1 T2 - Tomato 2 They are connected like so: A -----+-T1 ==== wireless bridge ==== T2----- ADSL modem | | C & D Connected wirelessly to T2 B -----+ A, C & D do not experience any issues. I have an active SSH session to B from A and it's not experiencing any loss. B, the new server occasionally cannot ping T2 and therefore cannot connect to the internet. However, A can always contact B and B can ping A and B When the network is lost, B can still ping T1, but not T2 yet at the same as B has lost connection to T2, A can still ping T2. Any ideas on what this could be? there is nothing that gives any clues in any of the logs on either router or the linux server. One thing that is interesting is that I set up a ping running between B and T2. T2 has the IP address 192.68.1.1 Here is what I am seeing: From 192.168.1.1 icmp_seq=26 Destination Host Unreachable From 192.168.1.1 icmp_seq=27 Destination Host Unreachable From 192.168.1.1 icmp_seq=28 Destination Host Unreachable From 192.168.1.1 icmp_seq=29 Destination Host Unreachable From 192.168.1.1 icmp_seq=30 Destination Host Unreachable From 192.168.1.1 icmp_seq=31 Destination Host Unreachable From 192.168.1.1 icmp_seq=33 Destination Host Unreachable From 192.168.1.1 icmp_seq=34 Destination Host Unreachable From 192.168.1.1 icmp_seq=35 Destination Host Unreachable 64 bytes from 192.168.1.1: icmp_req=36 ttl=63 time=3.40 ms 64 bytes from 192.168.1.1: icmp_req=37 ttl=63 time=5.70 ms 64 bytes from 192.168.1.1: icmp_req=38 ttl=63 time=2.25 ms 64 bytes from 192.168.1.1: icmp_req=39 ttl=63 time=2.18 ms 64 bytes from 192.168.1.1: icmp_req=40 ttl=63 time=3.12 ms 64 bytes from 192.168.1.1: icmp_req=41 ttl=63 time=2.15 ms 64 bytes from 192.168.1.1: icmp_req=42 ttl=63 time=1.97 ms 64 bytes from 192.168.1.1: icmp_req=43 ttl=63 time= And it cycles to being reachable and not. So I guess you could say the question is, why is the router responding that it cannot be reached?

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  • Installing ArchLinux into Ubuntu 12.04 root

    - by Johnny
    Is it possible to install 2 linux distros into 1 root, so they share same uuid and guid, configs and packages + same user /home folder ? For example: I have Ubuntu and Windows 7 already in dual boot on my laptop. Could I install Arch's base, base-devel and kernel, so it won't conflict with Ubuntu on the same root folder? P.S I don't feel like repartitioning my drive again, 'cause there's very complicated hierarchy, which occupies the entire disk. =)

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  • How do I fix cfdisk error: "Partition ends in final partial cylinder"?

    - by Laurens
    The problem I want to install Arch Linux on my desktop, it is going to be a dual boot with Windows. I booted into the installation CD, but when I started cfdisk to partition my hard drive it gave me the following error: FATAL ERROR: Primairy parititon 1, partition ends in the final partial cylinder. The Question How can I troubleshoot and fix this? Additional details These will be added if asked for.

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  • Failover Internet connection?

    - by ez_brian0
    Hi In my Linux server i have three network cards. The eth0 card is connected to ISP1, the eth1 card is connected to LAN and the eth3 card is connected to ISP2. What i want to do is to automatically use eth3 as Internet connection if the eth0 connection fails. How can this be done? Another problem is that my firewall is referring to eth0 as the server is doing NAT for clients this would be broken if eth3 is taken in use, how can this be solved?

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  • Is there an alternative to /dev/urandom?

    - by altCognito
    Is there some faster way than /dev/[u]random? Sometimes, I need to do things like cat /dev/urandom /dev/sdb The random devices are "too" secure und unfortunately too slow for that. I know that there are wipe and similar tools for secure deletion, but I suppose there are also some on-board means to that in Linux.

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  • E-mails sent with postfix are marked as spam.

    - by unkown
    I am using gmail as my email provider, and I only have gmail servers for my mx records. I don't like the 500 message per day cap. To address this issue I would like to run postfix on my Linux machine to only send email, port 25 blocked by my firewall. I can send email, however google marks all messages sent with postfix as SPAM. How do I make sure that people know email sent with postfix is valid?

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  • Windows Vista not booting after deleting a partition

    - by crapiscrewedup
    Hello, My cousin just deleted his Linux partition and another smaller partitio nand now Windows is not booting, no he does not have the recovery disc. When Windows tries to boot it goes to "GRUB" and says "partition not loaded". What are some GRUB commands? And is it possible to fix this without using the recovery CD? Thank you in advance.

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  • pscp.exe (Putty SCP) ignoring preserve attributes flag

    - by jslatts
    I am trying to scp files from a windows server to a linux server with the original time and dates intact. When running the command: pscp.exe -p C:\temp\somefile.txt user@server:/temp/ The file on the server always has the date/time of the transfer, not the original file. Putty SCP seems to be completely ignoring the preserve attributes flag. Anyone experienced this before and/or have a solution?

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