cisco asa monitor traffic

Cisco's ASA Firewall is a stateful firewall that maintains a connection table (conn) about user information, by default the ASA provides stateful connections to TCP and UDP traffic, and is non-stateful to the ICMP protocol.The message traversal process for Cisco ASA is as fo

ASA-防火墙-cisco The role of the ASA firewall1, in the network to isolate dangerous traffic, no point.The principle of the ASA firewall1. Distinguish different areas by security level: internal area, external area, demilitarized zone.By default: High-level

In this article, I'll briefly explain the Active/standby failover configuration on the Cisco ASA. The lab is do in GNS3. Physical topology: ConfigurationCiscoasa/act/pri (config) # sh run failoverFailoverFailover LAN Unit PrimaryFailover LAN Interface failover_stateless GIGABITETHERNET0/2Failover link failover_stateful gigabitethernet0/1Failover interface IP failover_stateless 169.254.0.15 255.255.255

packet reassembly process. Otherwise, someone could send an endless stream of fragmented packets and exhaust the ASA ' s memory. Virtual Packet reassembly is limited in the following ways by default: A maximum of the unique packets that can be reassembled, per interface A maximum of fragments for a single packet A maximum time of 5 seconds for all fragments of a packet to arrive Commands used to Configure Virtual Packet

ASA supports two same-security-traffic types. Their application scenarios are1: different interfaces with the same security-level2: traffic between the same interfaces: cisco is called IPSEC hairpinnig, which is mainly defined in ipsec vpn.Description: ipsec vpn is not used for tunneling, or tunneling is not allowed. A

In actual cases also encountered this kind of problem, the customer intranet has a server map on the Internet, extranet user access Global-ip no problem, but intranet users want to access Global-ip will not pass, typical is the user will intranet server made public network DNS a record, Both internal and external networks are accessed through domain names.JUNIPER series equipment including NETSCREEN/ISG/SSG no such problems, directly through the ordinary dip can be achieved, the subsequent produ

Step 1 of Cisco ASA firewall VPN configuration: Create an address pool. To remotely access the client, you need to assign an IP address during logon. Therefore, we also need to create a DHCP address pool for these clients. However, if you have a DHCP server, you can also use a DHCP server. QUANMA-T (config) # ip local pool vpnpool 192.168.10.100-192.168.10.199 mask 255.255.255.0 Step 2: Create IKE Phase 1.

I will talk about two tips, one about monitoring switch port traffic and the other about store value. 1. Monitor switch port traffic Switch monitoring document in the production environment on the Internet. Therefore, it is complete, and a key knowledge is interspersed in the middle. Zabbix is still innocent .!!! In this demonstration, I used the production envir

Recently changed jobs, the company more than 40 people share a 20M bandwidth wireless network, the router for Cisco R2911. Boss, let me make a cacti to monitor Cisco routed network card traffic. The whole days can not get the SNMP data, finally to the routing permission to find that the last operation to the routing SN

Introduction MRTG (Multi Router Traffic Grapher, MRTG) is a tool software used to monitor network link traffic load. It obtains device traffic information through the SNMP protocol, in addition, the traffic load is displayed to the user in HTML document containing PNG format

data from the next time.#第一次提示OK ..., enter this command again after 30 seconds[Email protected] ~]#/usr/local/nagios/libexec/check_traffic.sh-v 2c-c public-h 192.168.5.209-i 10001-w 200,300-c 400,500-k-BOk-the traffic in are 1.00KB, out are 0.62KB, Total is 1.62KB. The Check Interval is 46s | In=1.00kb;200;400;0;0 Out=0.62kb;300;500;0;0 Total=1.62kb;500;900;0;0 Interval=46s;1200;1800;0;04. Add the check_traffic command in Commands.cfg (added in moni