I am also facing the same problem. And it is only happened if my client used
private IP (DHCP), and it is not only for POP. Telnet, and PCAnywhere also has the
same problem.
Anybody knows ?
Lukman
Bill Parker wrote:
> Hello All,
>
> I am still trying to figure out why smtp/pop3 requests take so long
> to respond or process when users try to send/retrieve mail off of the
> server...
>
> Machine Specs:
>
> Pent-133, 32MB, 1.6GB HD, CD-ROM, 2 Intel EEPro NIC's
>
> eth0 has static class C IP address connected to D-Link Switch
> for internet access (Cisco 4700 router with T-1 connected)
>
> eth1 has private ip address of 192.168.3.1 which several machines
> go thru to get internet access via IP chains (No problems observed)
>
> Distro is OpenLinux 2.2 (Caldera) with latest security RPM updates
>
> tcp.smtp.cdb allows 127.0.0.1, 192.168.3. and 192.168.2., and any
> machine assigned to our class C...The lan segment also has IPX/SPX
> traffic on it as we use Novell 3.12 for a file server...
>
> Machine runs caching DNS on port 53 (no problems observed)
>
> Machine runs ssh 1.2.2x on port 22 (no problems from work or home)
>
> Ipchains in rc.local looks like this:
>
> /sbin/ipchains -P forward DENY
> /sbin/ipchains -A forward -j MASQ -s 192.168.3.0/24 -d 0.0.0.0/0
>
> other commands in rc.local (before above lines) are:
>
> /sbin/ifconfig eth1 192.168.3.1 netmask 255.255.255.0 up
>
> # enable ip forwarding
>
> echo 1 > /proc/sys/net/ipv4/ip_forward
> echo 1 > /proc/sys/net/ipv4/tcp_syncookies
>
> Here are the start lines for qmail script in init.d
>
> start)
> echo -n "Starting: "
> env - PATH="/var/qmail/bin:/usr/local/bin" \
> qmail-start ./Maildir/ /usr/local/bin/accustamp \
> | /usr/local/bin/setuser qmaill /usr/local/bin/cyclog /var/log/qmail &
> echo -n "qmail "
>
> env - PATH="/var/qmail/bin:/usr/local/bin" \
> tcpserver -H -R -c100 0 pop-3 /var/qmail/bin/qmail-popup \
> nermal.xxxxx.com \
> /home/vpopmail/bin/vchkpw /var/qmail/bin/qmail-pop3d Maildir &
> echo -n "pop3 "
>
> env - PATH="/var/qmail/bin:/usr/local/bin" \
> tcpserver -H -R -x /etc/tcp.smtp.cdb -c100 -u7791 -g2108 0 smtp \
> /var/qmail/bin/qmail-smtpd 2>&1 > /dev/null &
> echo "smtp"
> ;;
> stop)
> echo -n "stopping qmail"
> killall qmail-send
> killall tcpserver
> echo
> ;;
>
> Does anyone have any idea or clues why smtp/pop3d would take so
> long to process...This used to work fine under a 2.0.36 >= kernel when
> I ran OpenLinux 1.2 Base (what I mean by this is issuing send/receive
> on OutLook Express or the same in Eudora Light ran in less than 5 seconds,
> but now runs in anywhere from 3 seconds to a full minute in some cases)...
>
> I'm going to cross-post this to the caldera list to see if anyone
> there has any ideas (it's driving me and my users crazy, a little at a
> time, so I have a woeful look on my face)...
>
> -Bill
>
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