similar to: Centos 7 - iptables service failed to start

Hello: When I installed CentOS 4.4 (from the ServerCD) on my server, I told it not to install a firewall and I disabled SELinux. The server is a SuperMicro 5015P-TR. I set up my own /etc/init.d/firewall with these rules: #!/bin/sh # Firewall script # # Source function library . /etc/init.d/functions RETVAL=0 # Some definitions (Will need to change ETH0_IP to match your configuration)

Hello: I have a machine running CentOS 5 x86_64. It is running apache httpd and tomcat. For some reason, after running for a few days, web requests stop responding. It happened again this morning. I check the syslog and see a HUGE number of logs like this: OUTPUT IN= OUT=eth0 SRC=[MyIP] DST=[OutsideIP] LEN=532 TOS=0x00 PREC=0x00 TTL=64 ID=52669 DF PROTO=TCP SPT=80 DPT=54697 WINDOW=61

Hello all: I am looking at the documentation of the new firewalld service in CentOS 7. It looks like no matter what I configure with it, outgoing connections are still going to be allowed. That does not seem very secure. I always set my servers to default policy of DROP for everything incoming and outgoing and then add rules to allow very specific traffic through. Is this possible using 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 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: 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: 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 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: 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 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 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 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 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: 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

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 machine running CentOS 5.2 I added two IP addresses to eth0 by copying /etc/sysconfig/network-scripts/ifcfg-eth0 to /etc/sysconfig/network-scripts/ifcfg-eth0:0 /etc/sysconfig/network-scripts/ifcfg-eth0:1 and changing the relevant IP info. I am now seeing outbound connections failing at my firewall from services like NTP, etc. since they are now using a source address from one

Hello: On a CentOS5 machine I set up for a client, in /etc/aliases, I set root's mail to forward to my email address so I can get notices from cron, etc. Unfortunately, I am now getting a lot of spam which is sent to root at theservername.com How can I tell sendmail to not accept external email to root? I searched the Internet and found some horribly convoluted solutions. There has to

Hello: I am looking at the RHEL 5.4 virtualization guide. According to Chapter 17, if I want to use KVM on my machine, I need to check if it has the constant Time Stamp Counter by running this: cat /proc/cpuinfo | grep constant_tsc When I do that on the server (Currently running CentOS 5.3), I do not get any output. According to the output, that means my system does not have the counter. It