ftpd

[Bart_6]

How many active ftp connections canb the ftpd handle?

[Karthik S S]

I dont think is there any limit. Inetd counts the number of connection occuring within a minute. If that number exceeds some threshold, is assumes the ftp service is broken (or under attack) and keeps getting restarted - and shuts down the service. In most systems, this can be overcome by adding a parameter to the inetd.conf file like .... nowait.400 (400 connections per minute).

Courtesy:
http://www.wu-ftpd.org/wu-ftpd-faq.html

[Vincent Fleming]

If I remember correctly, (everyone correct me if I'm wrong!) you get an ftpd process for every connection. So, the number of connections you can support is dependent on other things.

Why do you ask? What's the problem?

Vince

[Robert-Jan Goossens]

Hi,

Think this is related to maxusers.

Robert-Jan.

[Bart_6]

The actual FTP traffic on this particular system is quite low but there are many connections. Sometimes users are unable to connect to the system which implies there is some kind threshold...

[Paul Hawkins]

You are more likely to run out of other system resources before you hit a threshold on ftp connections.

[Vincent Fleming]

Well, then you should check your kernel tunables...

I have limited experience tuning HP-UX myself, so you would be better off listening to others than myself... perhaps someone like Harry will post a reply... but some of the resources to check are:

# of processes (NPROC)
memory utilization
most of the TCP/IP-related tunables
inetd configuration

Good luck!

Vince

[Ravi_8]

Hi,

I am not sure, active ftp connections are equal to number of telnet session that system can handle (nsrtel)
also check the NIC whether auto negotiation is off and it is full duplex which makes ftp faster

[Sridhar Bhaskarla]

Hi,

If you enabled ftp with -a which tells it to use /etc/ftpd/ftpaccess file, they have a look at that file. See if someone might have set a limit. You will find an entry similar to

limit all 10 Any /var/adm/syslog/ftpmsg.dead

In the above case, it will limit upto 10 sessions only for any user.

-Sri