Jon Nelson on Mon, 12 Feb 2001 10:00:19 -0500


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Re: [PLUG] port listening question


I wouldn't base any conclusions solely on netstat. To really find out what is listening you should use nmap to portscan yourself and/or go to www.grc.com and follow the link for "Shields up" and probe my ports.

At 03:13 PM 2/8/01 -0500, you wrote:
On my firewall, I see the following result of netstat -a.
The telnet is really ssh, so don't worry there: I just have ssh listen
on port 23 so I can get through my company firewall to home.

I'm wondering if anyone can help me understand whether the other stuff
poses a risk. My interpretation is that since they're not listening,
they must be outgoing, and so they're probably not a problem. But
maybe I'm just confused.

Tia.

-Jeff

ps: The internal interface is called gw.purple.com, the external
puddle.purple.com.



Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 *:telnet *:* LISTEN
tcp 0 0 *:ssh *:* LISTEN
udp 0 0 gw.purple.com.0.168:ntp *:*
udp 0 0 puddle.purple.com:ntp *:*
udp 0 0 localhost:ntp *:*
udp 0 0 *:ntp *:*
raw 0 0 *:icmp *:* 7
raw 0 0 *:tcp *:* 7
Active UNIX domain sockets (servers and established)
Proto RefCnt Flags Type State I-Node Path
unix 1 [ ] STREAM CONNECTED 498914 @000000c6
unix 0 [ ACC ] STREAM LISTENING 512196 /dev/log
unix 1 [ ] STREAM CONNECTED 653 @00000015
unix 1 [ ] STREAM CONNECTED 649 @00000014
unix 1 [ ] STREAM CONNECTED 496 @00000003
unix 1 [ ] STREAM CONNECTED 498915 /dev/log
unix 1 [ ] STREAM CONNECTED 654 /dev/log
unix 1 [ ] STREAM CONNECTED 650 /dev/log
unix 1 [ ] STREAM CONNECTED 497 /dev/log



-- Jeff

 Jeff Abrahamson  <http://www.purple.com/jeff/>



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Trooper Jon S. NELSON Pennsylvania State Police Computer Crimes Unit Office: 610-344-4471 Page: 866-284-1603 (Toll Free) Nextel: 610-637-0707 (Private ID 8777) Alt. email: jnelson@psp.state.pa.us



______________________________________________________________________
Philadelphia Linux Users Group       -      http://www.phillylinux.org
Announcements-http://lists.phillylinux.org/mail/listinfo/plug-announce
General Discussion  -  http://lists.phillylinux.org/mail/listinfo/plug