- Community Home
- >
- Networking
- >
- Legacy
- >
- Switches, Hubs, Modems
- >
- Core Switch (5406zl) virus throttling -- network t...
Switches, Hubs, and Modems
1753720
Members
4887
Online
108799
Solutions
Forums
Categories
Company
Local Language
юдл
back
Forums
Discussions
Forums
- Data Protection and Retention
- Entry Storage Systems
- Legacy
- Midrange and Enterprise Storage
- Storage Networking
- HPE Nimble Storage
Discussions
Discussions
Discussions
Forums
Forums
Discussions
юдл
back
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
- BladeSystem Infrastructure and Application Solutions
- Appliance Servers
- Alpha Servers
- BackOffice Products
- Internet Products
- HPE 9000 and HPE e3000 Servers
- Networking
- Netservers
- Secure OS Software for Linux
- Server Management (Insight Manager 7)
- Windows Server 2003
- Operating System - Tru64 Unix
- ProLiant Deployment and Provisioning
- Linux-Based Community / Regional
- Microsoft System Center Integration
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Blogs
Information
Community
Resources
Community Language
Language
Forums
Blogs
Topic Options
- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Printer Friendly Page
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО11-11-2008 04:22 PM
тАО11-11-2008 04:22 PM
Core Switch (5406zl) virus throttling -- network troubleshooting
Hi,
I'm troubleshooting some connectivity issues of our company to other location. Can you interpret the logs I collected in one of our core switch. Attach is the full log and slice log.
Port C4 is the connection of BU1 to the Main BU1 network.
The Main BU1 core switch Virus throttling technology is enable. I checked the logged for port C4 and found some entry.
Now here are some of my queries:
1. Is the High connection rate means that this is a possible attack/virus-like traffic?
2. If it is malicious traffic, if the port is configure to notify-only then the port will be affected from that malicious traffic?
3. for verification: if I throttled the port C4, are the normal traffic flow will not be affected by the mechanism?
4. Is the throttled IP from port C1 may affect connectivity issue from port C4?
5. base on the logs what recommendation can you give us to help us in troubleshooting the intermittent connection of BU1.
I'm troubleshooting some connectivity issues of our company to other location. Can you interpret the logs I collected in one of our core switch. Attach is the full log and slice log.
Port C4 is the connection of BU1 to the Main BU1 network.
The Main BU1 core switch Virus throttling technology is enable. I checked the logged for port C4 and found some entry.
Now here are some of my queries:
1. Is the High connection rate means that this is a possible attack/virus-like traffic?
2. If it is malicious traffic, if the port is configure to notify-only then the port will be affected from that malicious traffic?
3. for verification: if I throttled the port C4, are the normal traffic flow will not be affected by the mechanism?
4. Is the throttled IP from port C1 may affect connectivity issue from port C4?
5. base on the logs what recommendation can you give us to help us in troubleshooting the intermittent connection of BU1.
2 REPLIES 2
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО11-12-2008 12:18 AM
тАО11-12-2008 12:18 AM
Re: Core Switch (5406zl) virus throttling -- network troubleshooting
1. Is the High connection rate means that this is a possible attack/virus-like traffic?
yes your log high connection rate possible attack
2. If it is malicious traffic, if the port is configure to notify-only then the port will be affected from that malicious traffic?
have three filtering options
(notify only )report with log or snmp trap.
don't stop malicious traffic
Filtering Options
In the default configuration, connection-rate filtering is disabled. When
enabled on a port, connection-rate filtering monitors inbound IP traffic for a
high rate of connection requests from any given host on the port. If a host
appears to exhibit the worm-like behavior of attempting to establish a large
number of outbound IP connections in a short period of time, the switch
responds in one of the following ways, depending on how connection-rate
filtering is configured:
├в Notify only (of potential attack): While the apparent attack
continues, the switch generates an Event Log notice identifying the
offending host├в s source IP address and (if a trap receiver is configured
on the switch) a similar SNMP trap notice).
├в Throttle: In this case, the switch temporarily blocks inbound IP
traffic from the offending host source IP address for a ├в penalty├в
period and generates an Event Log notice of this action and (if a trap
receiver is configured on the switch) a similar SNMP trap notice.
When the ├в penalty├в period expires the switch re-evaluates the traffic
from the host and continues to block this traffic if the apparent attack
continues. (During the re-evaluation period, IP traffic from the host
is allowed.)
├в Block: This option blocks all IP traffic from the host. When a block
occurs, the switch generates an Event Log notice and (if a trap
receiver is configured on the switch) a similar SNMP trap notice. Note
that a network administrator must explicitly re-enable a host that has
been previously blocked.
my advice you can use block filtering option on switch
now occur some attack/virus malicious traffic on network your switch only reporting to you not blocking action
you must be enable block filter option
yes your log high connection rate possible attack
2. If it is malicious traffic, if the port is configure to notify-only then the port will be affected from that malicious traffic?
have three filtering options
(notify only )report with log or snmp trap.
don't stop malicious traffic
Filtering Options
In the default configuration, connection-rate filtering is disabled. When
enabled on a port, connection-rate filtering monitors inbound IP traffic for a
high rate of connection requests from any given host on the port. If a host
appears to exhibit the worm-like behavior of attempting to establish a large
number of outbound IP connections in a short period of time, the switch
responds in one of the following ways, depending on how connection-rate
filtering is configured:
├в Notify only (of potential attack): While the apparent attack
continues, the switch generates an Event Log notice identifying the
offending host├в s source IP address and (if a trap receiver is configured
on the switch) a similar SNMP trap notice).
├в Throttle: In this case, the switch temporarily blocks inbound IP
traffic from the offending host source IP address for a ├в penalty├в
period and generates an Event Log notice of this action and (if a trap
receiver is configured on the switch) a similar SNMP trap notice.
When the ├в penalty├в period expires the switch re-evaluates the traffic
from the host and continues to block this traffic if the apparent attack
continues. (During the re-evaluation period, IP traffic from the host
is allowed.)
├в Block: This option blocks all IP traffic from the host. When a block
occurs, the switch generates an Event Log notice and (if a trap
receiver is configured on the switch) a similar SNMP trap notice. Note
that a network administrator must explicitly re-enable a host that has
been previously blocked.
my advice you can use block filtering option on switch
now occur some attack/virus malicious traffic on network your switch only reporting to you not blocking action
you must be enable block filter option
cenk
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО11-12-2008 12:23 AM
тАО11-12-2008 12:23 AM
Re: Core Switch (5406zl) virus throttling -- network troubleshooting
Global and Per-Port Configuration
connection-rate-filter sensitivity < low | medium | high | aggressive > 3-11
filter connection-rate < port-list > < notify-only | throttle | block > 3-12
show connection-rate-filter < blocked-host >
connection-rate-filter sensitivity < low | medium | high | aggressive > 3-11
filter connection-rate < port-list > < notify-only | throttle | block > 3-12
show connection-rate-filter < blocked-host >
cenk
The opinions expressed above are the personal opinions of the authors, not of Hewlett Packard Enterprise. By using this site, you accept the Terms of Use and Rules of Participation.
News and Events
Support
© Copyright 2024 Hewlett Packard Enterprise Development LP