topic Re: FTP Login Session in Operating System - HP-UX

FTP Login Session

Michael Joseph — Tue, 09 Oct 2001 19:02:13 GMT

I am using HP-UX 10.20 on an HP 9000 K460. My problem is I have approximately 1400 FTP/Telnet users on my system. The users use WS-FTP to download/upload files. Also, I have my security properties set to disable any accounts not used with 30 days. My problem is that most of my users only FTP into the system and the system does not recognize the FTP session as a login in session. Due to the design of the system and other issues it has to be done this way. Any suggestion, if any, on how to get the system to recognize FTP as a login session. Thanks...

Re: FTP Login Session

harry d brown jr — Tue, 09 Oct 2001 19:05:59 GMT

You could either extend the login period from 30 days to 90 days, or you could possibly "flag" the account as active. Is this a trusted system?

Re: FTP Login Session

Santosh Nair_1 — Tue, 09 Oct 2001 19:09:14 GMT

ftp sessions are logged in wtmp, so you could write a script that parses the output from the 'last' command and see the last time the user ftpped into the system, i.e.:

last -R -1

will tell you when the user last accessed the system.

-Santosh

Re: FTP Login Session

Sridhar Bhaskarla — Wed, 10 Oct 2001 03:12:08 GMT

You need do it manually with some scripting as the accounts are accessed only through ftp.

1) Keep only 30 days of wtmp file. You can use
/usr/sbin/acct/fwtmp to resize files.

cat var/adm/wtmp | /usr/sbin/acct/fwtmp > /tmp/fwtmp.ascii

Use sed to delete the lines that are older than 30days. This is where you need to spend sometime in building a script.

convert it back to wtmp.

cat /tmp/fwtmp.ascii |/usr/sbin/acct/fwtmp -ic > /var/adm/wtmp

This way you can maintain wtmp files for 30days.

2. Once this is in place, your job is relatively easy. Get all the user_ids except for the standard and other required ones into a file

egrep -v '^root|^sys|^bin' /etc/passwd|awk '{print $1}' > userlist #(include other user ids that need to be there in -v args)

last -R > /tmp/last.detail (this has only 30days of data)
for user in `cat userlist`
grep "^$user" /tmp/last.detail >/dev/null 2>&1
if [$?! = 0 ] #(this userdidn't ftp for the last 30days)
then
passwd -l $user #Lock this account
echo "$user locked due to inactivity" >> /tmp/lock.detail
fi

Now do step 1 to trim the wtmp file for next day.

This gives you only an idea. You can develop a working script based on it.

-Sri