similar to: CentOS 7 - Firewall always allows outgoing packets?

Hello all: I did a fresh install of CentOS 7 on a new machine. I wrote /usr/local/bin/firewall.stop to remove all the firewall rules. It contains this code: # Flush the rules /usr/sbin/iptables -F # Set the default policies to accept /usr/sbin/iptables -P INPUT ACCEPT /usr/sbin/iptables -P OUTPUT ACCEPT /usr/sbin/iptables -P FORWARD ACCEPT I wrote /usr/local/bin/firewall.start to set the

Hello everyone: I tried following the instructions on this page to set up a VNC server: http://wiki.centos.org/HowTos/VNC-Server I can telnet to port 5901 from the machine itself: # telnet 127.0.0.1 5901 Trying 127.0.0.1... Connected to 127.0.0.1. Escape character is '^]'. RFB 003.008 But, when I try to connect to it from the outside world, I get a connection timeout. My

Hello: I am using a CentOS server as a KVM host using bridged networking for the guest servers. I would like to limit the bandwidth available to a guest. I tried using the tc command, but it is only limiting the download speed to the guest. Is there a way to limit the upload speed from the guests? Thanks, Neil -- Neil Aggarwal, (972) 834-1565 We lend money to investors to buy or refinance

Hello: I just did a fresh install of CentOS 6.2 on a virtual server. I am trying to configure Postfix but it does not seem to be reading configuration directives from /etc/postfix/main.cf Here is what I did to test it: vi /etc/postfix/main.cf and set this directive: myorigin = hello.world.com postfix reload postconf -d | grep myorigin I get this output: append_at_myorigin = yes myorigin =

Hello: Is it possible to use Samba to send documents to a Microsoft Shared Fax Printer? How would I give it the phone number and other recipient details that normally comes in the popup window when I print to a shared fax printer from Windows? Thanks, Neil -- Neil Aggarwal, (214)986-3533, www.JAMMConsulting.com FREE! Eliminate junk email and reclaim your inbox. Visit

Hello: I have a brother HL-1440 laser printer set-up and working fine on my RedHat 7.3 Linux box. The printer queue is named brotherLaser. I added a samba share for the printer with these options in my smb.conf file: [brotherLaser] path = /var/spool/lpd/brotherLaser writable = yes comment = Brother Laser Printer printable = yes public = yes I then went

Hello: Does anyone know a free or low cost online backup system for CentOS? Thanks, Neil -- Neil Aggarwal, (281)846-8957, http://www.JAMMConsulting.com CentOS 5.4 KVM VPS $55/mo, no setup fee, no contract, dedicated 64bit CPU 1GB dedicated RAM, 40GB RAID storage, 500GB/mo premium BW, Zero downtime

Hello: I have a Supermicro SuperServer 5015P-TR. It has a Pentium D and is running CentOS x86_64. Can this machine use 8GB RAM? I think it should because it is running a 64 bit OS, but I am concerned because it is fundamentally 32 bit hardware. Anyone have any experience in this area? Thanks, Neil -- Neil Aggarwal, (832)245-7314, www.JAMMConsulting.com Eliminate junk email and reclaim your

Hello: I am looking for a recommendation for a PCI-e RAID card for my server. The server has a PCI-e x16 low profile slot so the card has to be at most 6.6 inches long x 2.536 inches high. I would like to use RAID 5 with 3 drives so I have to have those capabilities. It has to be CentOS 5.4 compatible (Of course!). I took a look at the offerings from 3Ware, but their cards are too long. If

Hello: I have a client that is using MS SQL Server in a Windows 2003 server. They have a Linux machine (Fedora Core 3) that is acting as a file server using Samba. We want to write backups from the SQL Agent for SQL Server to one of the shares on the Samba server. If I set the share to allow guest access, the SQL Agent can write the backups just fine using \\Shares\SQLBackups\pubs.bak but, if

Hello: I have a host running two KVM guests. The guests use br0 and each has a static IP address. I am trying to figure out if there is a way to use snmpd on the host to measure the traffic usage of the guests. I do not want to require anything running on the guests since I do not control them. Looking at netstat -in on the host, I see this info: Kernel Interface table Iface MTU Met

Hello: I have been looking into projects that will automatically restrict hacking attempts on my servers running CentOS 5. I think the two top contenders are: DenyHosts - http://denyhosts.sourceforge.net Fail2ban - http://www.fail2ban.org >From what I see, DenyHosts only blocks based on failed SSH attempts whereas Fail2ban blocks failed attempts for other access as well. The main benefit

Hello: I have a server set up a CentOS 5 server for a client to push files onto using FTP. I have a cron job to process the files and move them to another directory. Sometimes, the cron job executes while the client is still uploading a file (Some of them can be large) and I get a partial file. Is there a way to tell when a file has finished uploading? I am using the vsftpd daemon installed

Hello: I have a printer set-up and working correctly on my Linux machine running Fedora Core 1. It is set up as a local printer called printer. I set it up thru the graphical printer configuration utility. I am trying to set it up as a network printer from my Windows XP machine using Samba. Here are the lines in my smb.conf file: [global] encrypt passwords = yes socket options

Hello: I am trying to set up user quotas on my /var partition to enforce limits on user's mailbox sizes. The machine is running CentOS 5. When I do this: /sbin/dumpe2fs /dev/md2 | grep 'Block size' Block size: 4096 That tells me the block size is 4k. But, if I do: repquota /var It is telling me that one of my users is currently using 10264 blocks. But, if I look at

Hello: Is there a command in virsh to shutdown all domains? I can do one at a time, but that is untenable for a large number of domains. Thanks, Neil -- Neil Aggarwal, (281)846-8957, http://UnmeteredVPS.net CentOS 5.4 VPS with unmetered bandwidth only $25/month! 7 day no risk trial, Google Checkout accepted

just to follow on my earlier post, i have pointers to a couple commercial C/W manuals for RHEL administration, but both of them use an entire chapter discussing virtualization using Xen. i'm under the impression that RH is firmly in the KVM camp (at least for now), and that learning Xen on red hat/centos wouldn't be as useful as learning KVM. thoughts? rday --

Hello: I booted from the CentOS 4.4 CD. I am trying to mount the partitions on the hard drive of the physical machine (Fedora Core). I did: mkdir /mnt/hda1 chmod 755 /mnt/hda1 mount /dev/hda1 /mnt/hda1 I get back: mount: /dev/hda1 already mounted or /mnt/hda1 busy I checked with df. I don't see hda1 anywhere. Any ideas what is wrong? Thanks, Neil -- Neil Aggarwal, (214)986-3533,

Hello: According to the Red Hat Virtualization Guide, Windows Server 2003 32-bit will only run as a fully virtualized guest on an AMD64 system. I thought I have seen a lot of discussion about running paravirtualized Windows on CentOS. Is that a bad idea? Neil -- Neil Aggarwal, (281)846-8957, www.JAMMConsulting.com Will your e-commerce site go offline if you have a DB server failure, fiber

Hi, I am thinking of setting up two servers in load balance mode. I would really appreciate your suggestions and hints... thnx, -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos/attachments/20090627/92f7f56c/attachment.html>