User contributions for Saurabh
From Notes_Wiki
- 13:08, 9 November 2012 diff hist +4,439 N Snort general rule options Created page with "=Snort general rule options= ==msg== The msg rule option tells the logging and alerting engine the message to print along with a packet dump or to an alert. It is a simple t..."
- 13:07, 9 November 2012 diff hist +5,551 N Configuring snort rules Created page with "=Configuring very basic snort rules= Following steps can be used for configuring or testing very basic snort rules: *Create file /etc/snort/rules/local.rules using '<tt>touch..."
- 13:07, 9 November 2012 diff hist +2,771 N Snort modes Created page with "=Various snort modes= Snort can be used in three different modes: *Sniffing - <tt>-v</tt> - In this mode snort just sniffs the packets and displays relevant information on sc..."
- 13:06, 9 November 2012 diff hist +3,692 N Installing snort on CentOS Created page with "=One can use these steps to install snort on CentOS 5.5 or later= The following steps work on CentOS-5.5 with snort-2.9.0.5, libpcap-1.1.1 and daq-0.5 perfectly. # <tt>chkcon..."
- 13:05, 9 November 2012 diff hist +310 N Snort configuration Created page with "=Snort configuration= *Installing snort on CentOS *Snort modes *Configuring snort rules *Snort general rule options *Snort payload rule options *[[Snort n..."
- 13:05, 9 November 2012 diff hist +25 m Security tools
- 13:04, 9 November 2012 diff hist +2,591 N Basic disk quota configuration Created page with "=Basic disk quota configuration= To enable user quota on some filesystem follow these steps: # Add option '<tt>usrquota</tt>' in '<tt>/etc/fstab</tt>' of the partition on whi..."
- 13:04, 9 November 2012 diff hist +5 m Configuring disk quota
- 13:03, 9 November 2012 diff hist +56 N Configuring disk quota Created page with "=Configuring disk quota= *Basic quota configuration"
- 13:03, 9 November 2012 diff hist +55 N Filesystem configuration Created page with "=Filesystem configuration= *Configuring disk quota"
- 13:02, 9 November 2012 diff hist +30 m Main Page
- 13:02, 9 November 2012 diff hist +2,868 N Apache SELinux configuration Created page with "=apache SELinux configuration= ==Apache SELinux contexts== Apache process runs with SELinux context '<tt>unconfined_u:system_r:httpd_t:s0</tt>'. Files used by apache can h..."
- 13:01, 9 November 2012 diff hist +477 N SELinux contexts for various purposes Created page with "=SELinux contexts for various purposes= List of SELinux contexts for various purposes are listed here. We can use chcon to change context of some non-default location, if we ..."
- 13:01, 9 November 2012 diff hist +4,497 N SELinux configuration basics Created page with "=SELinux Configuration Basics= In Fedora 12 SELinux comes enabled by default and using it we can improve the security of system. When we use SELinux all files, users and proc..."
- 13:01, 9 November 2012 diff hist +135 N SELinux configuration Created page with "=SELinux configuration= *SELinux configuration basics *SELinux contexts for various purposes *apache SELinux configuration"
- 13:00, 9 November 2012 diff hist +27 m Main Page
- 13:00, 9 November 2012 diff hist +1,176 N Configuring parents for devices in nagios Created page with "=Configuring parents for devices in nagios= In nagios we can configure parents of hosts, so that if parent is down the childrens which depend on it are not checked. This is u..."
- 12:58, 9 November 2012 diff hist +4,836 N Configuring nrpe based internal service checks Created page with "=Configuring nrpe based internal service checks= We can use nrpe to monitor status of processes, hard-disk usage, cpu usage etc. on host. Since this things cannot be checked ..."
- 12:58, 9 November 2012 diff hist +4,851 N Configuring remote service checks using nagios Created page with "=Configuring remote service checks using nagios= We can check lot of remote services including ping, http, ftp, smtp, pop3 and imap using nagios. For other services we can wr..."
- 12:57, 9 November 2012 diff hist +1,901 N Configuring basic nagios server Created page with "=Configuring basic nagios server= Nagios is service monitoring tool which can periodically check status of various services and notify in case some service is not in proper s..."
- 12:56, 9 November 2012 diff hist +65 m Nagios configuration
- 12:55, 9 November 2012 diff hist +146 N Nagios configuration Created page with "=Nagios configuration= *Configuring basic nagios server *Configuring remote service checks *Configuring nrpe *Configuring parents"
- 12:55, 9 November 2012 diff hist +26 m Monitoring tools
- 12:54, 9 November 2012 diff hist +555 N Load balancing between two gateways Created page with "=Load balancing between two gateways= For load balancing between two gateways use: <pre> ip route del default ip route add default scope global nexthop via <gateway_1> ..."
- 12:53, 9 November 2012 diff hist +4,197 N Routing based on source, destination and other parameters Created page with "=Routing based on source, destination and other parameters= With advanced IP routing II features of Linux we can route based on source, destination and various other paramete..."
- 12:53, 9 November 2012 diff hist +134 N IP routing 2 configuration Created page with "=IP routing 2 configuration= *Routing based on source, destination and other parameters *Load balancing between two gateways"
- 12:53, 9 November 2012 diff hist +32 m Network related configuration
- 12:52, 9 November 2012 diff hist +2,337 N Port knocking Created page with "=Port knocking= We can use iptables for port knocking. In we configure port knocking then client should first try to access selected ports (which are closed) in pre-defined o..."
- 12:51, 9 November 2012 diff hist +5,742 N NAT using iptables Created page with "=NAT using iptables= iptables provides very flexible NAT options. We can do static source NAT, static destination NAT, dynamic NAT, etc. with the help of iptables NAT feature..."
- 12:51, 9 November 2012 diff hist +1,772 N Rate limiting using iptables Created page with "=Rate limiting using iptables= We can limit rate of network communication using iptables to protect against flood attacks and also to regulate network usage. ==To protect a..."
- 12:51, 9 November 2012 diff hist +2,984 N Limiting number of new connections Created page with "=Limiting number of new connections per interval using iptables= We can also limit number of new connection attempts per interval using iptables. This is required even though..."
- 12:50, 9 November 2012 diff hist +619 N Limiting number of simultaneous connections Created page with "=Limiting number of simultaneous connections using iptables= ==Using connlimit module== We can use connlimit module of iptables to limit number of simultaneous connections t..."
- 12:50, 9 November 2012 diff hist +191 N Iptables configuration Created page with "=iptables configuration= *Limiting number of simultaneous connections *Limiting number of new connections *Rate limiting using iptables *NAT using iptables *[..."
- 12:50, 9 November 2012 diff hist +29 m Main Page
- 12:49, 9 November 2012 diff hist +1,521 N Configuring HP D1668 Deskjet in CentOS Created page with "=Configuring HP D1668 Deskjet in CentOS 5.4= (Required SELinux to be disabled, at least during installation) *Run '<tt>yum -y -d 10 -e 1 install cups cups-devel gcc-c++ ghos..."
- 12:48, 9 November 2012 diff hist +62 N Printer drivers Created page with "=Printer drivers= *Configuring HP D1668 Deskjet in CentOS"
- 12:48, 9 November 2012 diff hist +70 N Hardware drivers configuration or installation Created page with "=Hardware drivers configuration or installation= *Printer drivers"
- 12:48, 9 November 2012 diff hist +52 m Main Page
- 12:47, 9 November 2012 diff hist +1,230 N Configuring wireless interfaces Created page with "=Configuring wireless interfaces= To configure wireless interfaces in Linux one can use combination of '<tt>ifconfig</tt>', '<tt>iwconfig</tt>' and '<tt>iwlist</tt>' commands..."
- 12:45, 9 November 2012 diff hist +791 N IPv4 route configuration Created page with "=IPv4 route configuration= To add routes whenever a network gets started automatically we need to create a per-interface route file. For examples if we can reach network '10...."
- 12:45, 9 November 2012 diff hist +1,567 N MAC spoofing on Virtual machines Created page with "=MAC spoofing on virtual machines= We can change MAC address of interface using: <pre> ifconfig eth0 down ifconfig eth0 hw ether <new_MAC> ifconfig eth0 up </pre> But on Vir..."
- 12:44, 9 November 2012 diff hist +2,375 N Enabling wake on lan (WoL) Created page with "=Enabling Wake on LAN (WoL)= To enable wake on lan for a interface when it receives magic packet: *Open file '<tt>/etc/sysconfig/network-scripts/ifcfg-eth<n></tt>' *Add..."
- 12:43, 9 November 2012 diff hist +1,946 N Creating bridge interfaces (br0) for virtual hosts to use shared interface Created page with "=Creating bride interfaces (br0) for virtual hosts to use shared interface= There are two networking options when we create virtual machines *Virtual network and NAT *Shared ..."
- 12:42, 9 November 2012 diff hist +1,009 N Configuring ethernet port in trunk mode Created page with "=Configuring ethernet port in trunk mode= Assuming eth0 is to configured in trunk mode and VLAN 127 has to be used using 802.1q over eth0, follow these steps: (Note that devi..."
- 12:42, 9 November 2012 diff hist +295 N Network interface configuration Created page with "=Network interface configuration= *Configuring ethernet port in trunk mode *Creating bride interfaces (br0) for virtual hosts to use shared interface *[[Enabling wake..."
- 12:41, 9 November 2012 diff hist +69 N Network related configuration Created page with "=Network related configuration= *Network interface configuration"
- 12:41, 9 November 2012 diff hist +72 m Main Page
- 05:52, 9 November 2012 diff hist +663 N Ntpdate configuration Created page with "=ntpdate configuration= Sometimes we can get following message when we try to start ntpd service <pre> ntpd: Synchronizing with time server: [FAILED] Starting ntpd..."
- 05:51, 9 November 2012 diff hist +55 N Time server configuration Created page with "=Time server configuration= *ntpdate configuration"
- 05:51, 9 November 2012 diff hist +30 m Main Page