Solved

icmp port numbers

Posted on 2009-04-01
4
9,029 Views
Last Modified: 2013-11-29
Hi,

Can any one explain me the ports numbers used for icmp both for echo request and reply

Any standard piece of code for blocking echo request and echo reply ;please help with the code for both router and pix;

Please help with the port for snmp also

thx
0
Comment
Question by:phoenix26
4 Comments
 
LVL 3

Assisted Solution

by:i_t
i_t earned 100 total points
ID: 24046613
access-list 101 deny udp any any eq snmp
access-list 101 deny icmp any any

i don't think echo uses a port number because it is beneath tcp
0
 

Author Comment

by:phoenix26
ID: 24047099
Hi ,

Thanks for your suggestion.

But i beileve there is some way for blocking icmp echo request and echo reply ?any suggestions on coding
0
 
LVL 43

Accepted Solution

by:
JFrederick29 earned 300 total points
ID: 24048873
0
 
LVL 10

Assisted Solution

by:atlas_shuddered
atlas_shuddered earned 100 total points
ID: 24056219
icmp doesn't use port numbers as noted above.

for your rtr you'll need to post the following lines in your acl:

ip access-list ext XXXX
permit icmp {source ip} {source mask}/{any} {destination ip} {destination mask}/{any} echo
permit icmp {source ip} {source mask}/{any} {destination ip} {destination mask}/{any} echo reply

for the pix you can use the same format, difference being that if you are trying to ping from outside to inside you will need to set up a translation set.

Hope it helps.

Cheers
0

Featured Post

PRTG Network Monitor: Intuitive Network Monitoring

Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Understanding FTPS File transfer is a common requirement in most Enterprises. While there are numerous ways to get a file from Point A to Point B over a network, perhaps the most common method still in use is FTP – File Transfer Protocol. FTP is …
This is the first one of a series of articles I’ll be writing to address technical issues that are always referred to as network problems. The network boundaries have changed, therefore having an understanding of how each piece in the network  puzzl…
Viewers will learn how to properly install and use Secure Shell (SSH) to work on projects or homework remotely. Download Secure Shell: Follow basic installation instructions: Open Secure Shell and use "Quick Connect" to enter credentials includi…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…

773 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question