Cisco 3845 of storm-control

Hello

First of all, sorry for my English. I was attacked in one of my public ip address. I was wondering how to solve this problem, I found when I was attacked, and numer of pps in my interface goes up to 800 kpps. I was looking for an I found the function 'control of the storm '. I have a Cisco 3845, can you tell me what I can do to avoid attacks.

Hello

So I suggest that you attached a fw between your router and the internet or apply an IOS security.

Basic stuff to assign:

No finger service
no service button
no service udp-small-servers
no service tcp-small-servers
horodateurs service debug datetime localtime show-timezone msec
Log service timestamps datetime localtime show-timezone msec
encryption password service
tcp KeepAlive-component snap-in service
a tcp-KeepAlive-quick service

not run cdp
no ip bootp Server
no ip address of the http server
no ip finger
no ip source route
no ip free-arps
block connection-for 10 tries 2-5

all the ints FastEthernet/concert
-------------------------
no ip redirection
no ip proxy-arp
no ip unreachable
no ip directed broadcast to the
no response to mask ip
No mop enabled

all serial interfaces
-------------------------
no ip redirection
no ip proxy-arp
no ip unreachable
no ip directed broadcast to the
no response to mask ip

and then maybe use a simple CBAC inspection
----------------------------------------------------------------

R1
inspect the TCP IP ios_fw name
inspect the name ios_fw UDP IP
inspect the name ios_fw ICMP IP

allowed access list 100 deny ip any one

int fax / x (interface WAN face)
inspect the ios_fw over IP
IP access-group 100 to

RES

Paul

Tags: Cisco Network

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    =====================================

    I don't know why the vlan 216 became the vlan voice?

    I tried changed the build-in macro settings,

    auto macro of the built-in parameters ip_phone $native_vlan 348
    auto macro of the built-in parameters ip_phone_desktop $native_vlan 348

    but the system could not change the value of $voice_vlan.

    How to fix?

    Hi Skywings,

    So I think the above output is after the change, right? If this is true, it seems that something was wrong during the configuration process. Process of VLAN automatic voice has two main phases where one is related to communication between the switches and other Cisco infrastructure devices and synchronization of voice VLAN ID. The second phase is related to the identification of the end device as phone. What I see in your case that the first phase has failed somehow the voice VLAN ID is different from locally configured. Can you share with me your race and also start-up config more CDP neighbors? You can use private message.

    Kind regards

    Aleksandra

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