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Hello<br />
<br />
What box do you have? Cisco? If so try to assign following ACL to interface you are expect attack:<br />
<br />
access-list 120 deny tcp any 192.168.0.0 0.0.0.255 eq 23<br />
access-list 120 permit ip any any<br />
<br />
So it will block any telnet traffic from anywhere to any machine on 192.168.0.X network but will allow everything else.<br />
<br />
Regards
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Hello

What box do you have? Cisco? If so try to assign following ACL to interface you are expect attack:

access-list 120 deny tcp any 192.168.0.0 0.0.0.255 eq 23
access-list 120 permit ip any any

So it will block any telnet traffic from anywhere to any machine on 192.168.0.X network but will allow everything else.

Regards

<div>
If it is Layer 2 switch then it is impossible to block traffic on tcp port- based criteria. If it is a Layer 3 switch (router) - check manual for how to apply ACL on it. What exact model ?
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If it is Layer 2 switch then it is impossible to block traffic on tcp port- based criteria. If it is a Layer 3 switch (router) - check manual for how to apply ACL on it. What exact model ?

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It's layer three. 48si.<br />
<br />
On a suddenly more important note, erm... any idea what to do if you forget the admin password? <br />
<br />
&gt;dumb&lt;
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It's layer three. 48si.

On a suddenly more important note, erm... any idea what to do if you forget the admin password?

>dumb<

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<div class="content wysiwyg-content">
I'm looking to create an an access list to lock down telnet access to my Summit48i.<br />
<br />
What's confusing me though, is because it is in layer 3 mode, there are a number of different IP addresses which I change often.<br />
<br />
Is there a way of locking down ALL telnet traffic to, say, 192.168.0/24 for ALL ports on the switch, but not affecting traffic which is simply being routed through it?
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I'm looking to create an an access list to lock down telnet access to my Summit48i.

What's confusing me though, is because it is in layer 3 mode, there are a number of different IP addresses which I change often.

Is there a way of locking down ALL telnet traffic to, say, 192.168.0/24 for ALL ports on the switch, but not affecting traffic which is simply being routed through it?

Extreme - Telnet Access List

A router is a networking device that forwards data packets between computer networks. Routers perform the "traffic directing" functions on the Internet. The most familiar type of routers are home and small office cable or DSL routers that simply pass data, such as web pages, email, IM, and videos between computers and the Internet. More sophisticated routers, such as enterprise routers, connect large business or ISP networks up to the powerful core routers that forward data at high speed along the optical fiber lines of the Internet backbone. Though routers are typically dedicated hardware devices, use of software-based routers has grown increasingly common.