Re: What is port 3 used for?
From: Barry Margolin (barmar@genuity.net)Date: 03/25/02
- Next message: Ivan Kelly: "Re: Interesting Apache logs"
- Previous message: bsduser: "ICMP Redirect interpretation"
- In reply to: Bernd Eckenfels: "Re: What is port 3 used for?"
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] [ attachment ]
From: Barry Margolin <barmar@genuity.net> Date: Mon, 25 Mar 2002 19:17:42 GMT
In article <a7hpdv$7ua$1@sapa.inka.de>,
Bernd Eckenfels <ecki-news2002-03@lina.inka.de> wrote:
>Ajmo <alanjohnmoore@yahoo.com> wrote:
>> Mar 19 18:01:17 xxxx kernel: Packet log: output REJECT eth1 PROTO=1
>> x.x.x.x:3: 204.215.60.153 3 L=92 S=0xC0 I=49567 F=0x0000 T=255 (#34)
>
>This is ICMP
And ICMP type 3 is Destination Unreachable, a pretty common ICMP packet.
If that '3' between 204.215.60.153 and L=92 is the code, it's Port
unreachable; your machine will send this whenever it receives a UDP packet
addressed to a port that isn't in use. If someone is port scanning you,
you'll send out a bunch of these.
-- Barry Margolin, barmar@genuity.net Genuity, Woburn, MA *** DON'T SEND TECHNICAL QUESTIONS DIRECTLY TO ME, post them to newsgroups. Please DON'T copy followups to me -- I'll assume it wasn't posted to the group.
- Next message: Ivan Kelly: "Re: Interesting Apache logs"
- Previous message: bsduser: "ICMP Redirect interpretation"
- In reply to: Bernd Eckenfels: "Re: What is port 3 used for?"
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] [ attachment ]
Relevant Pages
|
