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тАО11-19-2002 08:08 AM
тАО11-19-2002 08:08 AM
Hi,
Below you will see a partial output from a netstat command. Note the Foreign Addresses that show only a port number. We've determined that these come from Winblows 2000 PCs that have turned off the Message Service. This is done so the user doesn't get a message box everytime she prints.
Is there a way ( maybe through /var/adm/inetd.sec ) to block connections from PCs that are not advertising their IP address?
Thanks,
Tom
----------------------------------------
Active Internet connections
Proto Recv-Q Send-Q Local Address Foreign Address (state)
tcp 0 0 flo1q07.ora1526 .1599 ESTABLISHED
tcp 0 0 localhost.49194 localhost.49284 ESTABLISHED
tcp 0 0 flo1q07.telnet tdawsond.eptnet.com.3596 ESTABLISHED
tcp 0 0 flo1q07.ora1526 flo1a03.eptnet.com.1058 ESTABLISHED
tcp 0 0 localhost.49286 localhost.49194 ESTABLISHED
tcp 0 0 localhost.49284 localhost.49194 ESTABLISHED
tcp 0 0 flo1q07.ora1526 .1663 ESTABLISHED
tcp 0 0 flo1q07.ora1526 .1673 ESTABLISHED
tcp 0 0 flo1q07.ora1526 .1601 ESTABLISHED
tcp 0 0 flo1q07.ora1526 .1604 ESTABLISHED
tcp 0 0 localhost.49288 localhost.49194 ESTABLISHED
tcp 0 0 flo1q07.1748 flo1a03.eptnet.com.4295 ESTABLISHED
tcp 0 0 flo1q07.49214 flo1q07.ora1526 ESTABLISHED
tcp 0 0 flo1q07.ora1526 flo1q07.49214 ESTABLISHED
tcp 0 0 flo1q07.ora1526 flo1q07.49213 ESTABLISHED
Below you will see a partial output from a netstat command. Note the Foreign Addresses that show only a port number. We've determined that these come from Winblows 2000 PCs that have turned off the Message Service. This is done so the user doesn't get a message box everytime she prints.
Is there a way ( maybe through /var/adm/inetd.sec ) to block connections from PCs that are not advertising their IP address?
Thanks,
Tom
----------------------------------------
Active Internet connections
Proto Recv-Q Send-Q Local Address Foreign Address (state)
tcp 0 0 flo1q07.ora1526 .1599 ESTABLISHED
tcp 0 0 localhost.49194 localhost.49284 ESTABLISHED
tcp 0 0 flo1q07.telnet tdawsond.eptnet.com.3596 ESTABLISHED
tcp 0 0 flo1q07.ora1526 flo1a03.eptnet.com.1058 ESTABLISHED
tcp 0 0 localhost.49286 localhost.49194 ESTABLISHED
tcp 0 0 localhost.49284 localhost.49194 ESTABLISHED
tcp 0 0 flo1q07.ora1526 .1663 ESTABLISHED
tcp 0 0 flo1q07.ora1526 .1673 ESTABLISHED
tcp 0 0 flo1q07.ora1526 .1601 ESTABLISHED
tcp 0 0 flo1q07.ora1526 .1604 ESTABLISHED
tcp 0 0 localhost.49288 localhost.49194 ESTABLISHED
tcp 0 0 flo1q07.1748 flo1a03.eptnet.com.4295 ESTABLISHED
tcp 0 0 flo1q07.49214 flo1q07.ora1526 ESTABLISHED
tcp 0 0 flo1q07.ora1526 flo1q07.49214 ESTABLISHED
tcp 0 0 flo1q07.ora1526 flo1q07.49213 ESTABLISHED
Solved! Go to Solution.
3 REPLIES 3
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тАО11-19-2002 10:15 AM
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тАО11-19-2002 10:37 AM
тАО11-19-2002 10:37 AM
Re: How to block "No Foreign Address" connections?
Wodisch,
Thanks! And it's probably not a bad idea at that! I was trying to see if I could accomplish it with software already on the system.
Tom
Thanks! And it's probably not a bad idea at that! I was trying to see if I could accomplish it with software already on the system.
Tom
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тАО11-19-2002 10:46 AM
тАО11-19-2002 10:46 AM
Re: How to block "No Foreign Address" connections?
Tom,
It's not possible for a PC to connect to anything on a IP NETWORK without an IP address.
Get lsof, as netstat bites!
http://hpux.cs.utah.edu/hppd/hpux/Sysadmin/lsof-4.64/
and of course you should be running netstat like this:
netstat -an
They'll show up!
live free or die
harry
It's not possible for a PC to connect to anything on a IP NETWORK without an IP address.
Get lsof, as netstat bites!
http://hpux.cs.utah.edu/hppd/hpux/Sysadmin/lsof-4.64/
and of course you should be running netstat like this:
netstat -an
They'll show up!
live free or die
harry
Live Free or Die
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