Re: [Snort-users] 回复： Need help with telnet

[sepehr hashtroudilar <sepehr.ha () gmail com>]

You are right,  but this is a special case and i cant block telnet :(

On Dec 25, 2016 3:23 PM, "Luke Ager" <luke.ager () me com> wrote:

> Since telnet isn't exactly secure my advice would be to block it
> altogether if possible.
>
> Sent from my iPhone
>
> On 25 Dec 2016, at 11:23, sepehr hashtroudilar <sepehr.ha () gmail com>
> wrote:
>
> No i cant speak in Chinese.
> Let me simplify :
>
> In my situation:
> i want to detect and drop telnet cmd (send from client) bofore execution
> on telnet server.
>
> I want snort:
> 1. to check the stream and match rules with that.
> 2.If any rule matched dont send the final packet to server (witch in
> telnet is always enter \r or 0d)
> 3.drop connection.
>
> I know that stream5 and ftp/telnet is made for these purpose.
>
> I tried many configuration,  but all the time i get alert after a while.
> And Connection drop after cmd executed.
>
> On Dec 25, 2016 2:16 PM, "eagleliujin" <eagleliujin () 163 com> wrote:
>
> > i am sorry,i cant exactly understand you.i dont know your problem.could
> > you please speak chinese?
> > 在 sepehr hashtroudilar <sepehr.ha () gmail com>，2016年12月25日 下午4:28写道：
> >
> > Hi,
> > I have problem with telnet commands that user is typing.
> > The server to client is ok,  and i successfully get the alert with
> > incoming packets from server, witch i can drop.
> > The problem starts with telnet behavior witch sends every character one
> > by one.
> > With stream5 i managed to get it work but i get the alert afther cmd
> > executed.
> > Witch I want is, to prevent cmd from execution (ips) and drop the packet
> > before is is executed.
> >
> > For example: i want every time user try to execute "net user" cmd,  drop
> > the connection before cmd executed on server.
> > Is there any configuration for this purpose with stream5 or ftp/telnet
> > processors.  or any other configuration/rule?
> > I read entire docs, maybe i cant find!!?
> >
> > ------------------------------------------------------------
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