search for: ritzlmayr

Hi List, optimizing the configuration on one of our servers (which was hit by a brute force attack on dovecot) showed an odd behavior. Dovecot Version 1.0.7 (CentOS 5.2) The short story: On one of our servers an attacker did a brute force attack on dovecot (pop3). Since the attacker closed and reopened the connection after every user/password combination the logs showed many lines like

Hi List, optimizing the configuration on one of our servers (which was hit by a brute force attack on dovecot) showed an odd behavior. The short story: On one of our servers an attacker did a brute force attack on dovecot (pop3). Since the attacker closed and reopened the connection after every user/password combination the logs showed many lines like this: dovecot: pop3-login: Aborted

Hi List, Centos 5(.2) ships with dovecot-1.0.7-2.el5 and logwatch-7.3-6.el5 However the shipped logwatch is not aware of dovecot 1.x meaning none of the log entries (var/log/maillog) are processed at all. Should I file a bug report on this? Upstream? cheers Henry

Hi list, should it be possible to scp a partition with this command: scp /dev/sda7 backupserver:/backup/sda7.img I always get "not a regular file" - which is a clear and understandable error, but my googling tells me that some people are doing this - and it seems to work - at least at their systems. I know that I can avoid this by simply doing dd if=/dev/sda7 | ssh backupserver dd

Hi list, since release 5.3 all kernels ignore options netloop nloopbacks=<n> within /etc/modprobe.conf If <n> is smaller than four there are always four vifs created. If <n> is bigger than four the appropriate number of vifs are created. Is this expected/new/feature/bug? Henry

Hi list, kernel-xen-2.6.18-53.1.14.el5 and kernel-xen-2.6.18-53.1.19.el5 do not detect/initialize/whatever my eth1 network card any more. With kernel-xen-2.6.18-53.1.13.el5 everything is working as expected. With the two recent kernels I only get an Interface named __tmp786686833 which is not added to xenbr... lspci -v to the adapter in question says 02:00.0 Ethernet controller: Intel

Hi list. I am testing CentOS 5.2 now. I experience much slower IO under HVM Guests with the newer kernels, so I started some measurements. DOM-0 is a fully upgraded CentOS 5.2. DOM-U is CentOS 5.0 not upgraded at all for testing purposes. DOM-U sits on an LVM Volume. No other services are running. Hardware was freshly rebooted every time. within DOM-0 dd if=/dev/vgpentanol/lvol2 of=/dev/null