common firewalls

Use Zabbix to monitor corporate firewalls through SNMP The company uses the FortiGate 80C firewall, and now uses Zabbix to monitor its status through SNMP. Add the -- with-net-snmp parameter to compile and install zabbix. First, Enable SNMP on the firewall, and then add a host in Zabbix References Https://www.zabbix.com/documentation/2.2/manual/config/items/itemtypes/snmp Use snmpwalk to obtain a series of SNMP strings $ Snmpwalk-v 2c-c public 10.10.

Many people may not have a special understanding of the security router. Here we mainly analyze the practical application of the firewall and the security router. Generally, vrouters and firewalls are two different concepts, which can be understood literally. But now there are more and more vro functions. One of the most important functions is the security protection function. This is what we call the security router. It integrates security functions

charge of all the doors (ports) of the system ), it is responsible for verifying the identity of the person in and out, and everyone needs to get the permission of the highest chief executive, and the highest chief executive is yourself. Whenever an unknown program wants to enter the system or connect to the network, the firewall immediately intercepts the program and checks its identity, if you permit the access (for example, you allow a program to connect to the network in the application rul

This#Interface GIGABITETHERNET0/0/4Portlink-type AccessPortdefault VLAN 20#Return[S2]interface gigabitethernet 0/0/5[S2-gigabitethernet0/0/5]port Link-typetrunk[S2-port-group-trunk]port Trunk Allow-passvlan 20 30Enter system view, return user view withctrl+z.[S3]interface gigabitethernet 0/0/3[S3-gigabitethernet0/0/3]port link-typeaccess[S3-gigabitethernet0/0/3]port Default Vlan30[S3-gigabitethernet0/0/3]disp This#Interface GIGABITETHERNET0/0/3Portlink-type Access#Return[S3]interface gigabiteth

: CentOS release 6.6 (Final)Five, SSH connection toolsecurecrt Background color change:Options-session Options-terminal-emulation-right terminal select Linux (white on black) or other personal favoriteServer-side to see if SSH is turned onNetstat-lntup|grep 22SECURECRT using configuration details Tutorial http://www.linuxidc.com/Linux/2015-01/112172.htmHow do I log on to a Linux server with a public key on SECURECRT? Http://www.linuxidc.com/Linux/2014-11/109973.htmsecurecrt Details : please clic

Note: If the development is not set to off, there may be many effects that do not appear in the expectedPath:/etc/selinux/config* Modification (Copy control when modified)(copy): CP/ETC/SELINUX/CONFIG/ETC/SELINUX/CONFIG.QE(replace): Sed-i "S#selinux=enforing#selinux=disabled#g"/etc/selinux/configSince Linux has to restart the command to take effect, in order to ensure that the server can run correctly, the command in config will be changed first.Then use (setenforce temporary boot) to view the c

Vulnerabilities in Cisco FirePower firewalls allow malware Bypass Detection Security Vulnerabilities in CISCO FirePower firewall devices allow malware to bypass the detection mechanism. Cisco is releasing security updates to a critical vulnerability (CVE-2016-1345) that affects FirePower firewall, one of Cisco's latest products. This vulnerability was first discovered by security researchers at Check Point. According to Cisco's Security Bulletin, a

: Firewall-cmd--state View all open ports: Firewall-cmd--zone=public-- List-ports Update firewall rules: Firewall-cmd--reload View area information: Firewall-cmd--get-active-zones View specified interface zone: Firewall-cmd-- Get-zone-of-interface=eth0 reject All packages: Firewall-cmd--panic-on de-deny status: Firewall-cmd--panic-off View reject: Firewall-cmd-- Query-panic How do I open a port? Add Firewall-cmd--zone=public --add-port=80/tcp--permanent (--permanent permanent, no failure after t

According to foreign media reports, over time, more and more users began to rely on the Internet to work, learn, and entertain, which led to more and more Internet attacks, this makes users' computers face a lot of potential risks every day. To defend against these network threats, major security vendors have successively launched various types of firewalls. As the name suggests, a firewall is a device that helps ensure information security. It allow

InformationFirewall-cmd--get-active-zones10. View the zone information for the specified interfaceFirewall-cmd--get-zone-of-interface=eth011. Reject All PackagesFirewall-cmd--panic-on12. Cancel the Deny statusFirewall-cmd--panic-off13. See if you are rejectingFirewall-cmd--query-panic14. Add an interface to a zone (the default interface is public)Firewall-cmd--zone=public--add-interface=eth0 (permanently effective plus--permanent then reload firewall)15. Set the default interface areaFirewall-c

Receive queue and the send queue. These figures are generally supposed to be 0. If not, the package is queuedIn the stack. This situation can only be seen in very few cases.The other is the active UNIX domain sockets, known as the active UNIX Domains socket interface (as with network sockets, but only for native communication, which can be increased by one-fold performance).Proto shows the protocol used by the connection, refcnt represents the process number connected to this set of interfaces,

Drilling on a fireproof wall "UDP Hole puching": Building a UDP connection through a firewall Do you know how popular Peer-to-peer software and IM software makes two computers that are located behind different firewalls directly talking to each other? SIP is a kind of course, there is a widely used in this paper is the introduction of the UDP Hole puching technology. To make it easier to tell, let's assume that there is a network topology: IP=A.A.A