similar to: SSH slow

Hi. For a long time I am puzzled why, when internet connection is gone (beyond first router, outside of subnet) SSH (and telnet?) connection is drastically slowed. Same behavior, but less impacted is observed when system boots without working internet connection, and I am not sure, but I think even access to SAMBA fileshares can be/is affected. Affected systems are mostly production

I've been noticing yum updates on several servers I manage over the last few weeks, which I know I didn't perform and could not explain until this morning. At first I suspect a break-in, but found no other evidence or reason an intruder would run the yum updates I was viewing. Yum updates are logged in /var/log/yum.log, which is what Logwatch scans. Seems that the format of the log

Ran into a strange issue with XEN on CentOS that I think is specific to CentOS, which is why I'm starting by posting to this list first, I'll post on the XEN list depending on responses. My sense is this issue has something to do with how CentOS handles network setup on first boot of the XEN kernel. - Installed a brand new CentOS 5.3 server with minimal packages. - Installed XEN,

All, For a production environment, I'd like to setup CentOS XEN guests as lightweight as possible. I'd like the XEN guests to be able to send nightly email as all CentOS servers do, but there is no reason to run a mail server as the CentOS Dom0 already has an email server running that can act as an email smart host. The options that seem most appealing to me are either ssmtp or sendmail

Can I adjust the ssh daemon to log IP addresses instead of hostnames? I assume this situation is feasible... * 10.10.10.10 attempts to ssh to the server * reverse dns resolves to "somehost.domain.com" * ssh daemon logs "somehost.domain.com" in messages * foward dns on "somehost.domain.com" resolves to 10.10.10.20 Thus it causes some of my scripts a problem if the

I am using Centos 5.2 as both my XEN host and guests. Both the XEN host and each XEN guest are up-to-date with the latest CentOS 5.2 updates. I've noticed over time that sometimes using init 6 (or init 0) in the guest works flawlessly and other times the guest will reach "Restarting System"/"System Halted" and hang. When this hang occurs the only way to finish the

I performed a test install of CentOS Beta 5 on a system with two ~60 GB drives. When installing CentOS 4 on this system, I normally work thru setting up Software RAID with identically sized partitions on each drive. For my test, the CentOS installer only presented a single drive. I took the default of letting it do what it wanted. After looking over the system I have verified that /boot is

Just prior to the time change, I made sure that ntpd and my timezone files were properly setup. Since this time, I've noticed the following errors: audit(1173310084.404:5): avc: denied { read } for pid=8634 comm="ntpd" name="unexpected.tdb" dev=md1 ino=147662 scontext=root:system_r:ntpd_t tcontext=root:object_r:samba_var_t tclass=file I've not successfully (so

Do people have wet underwear for nothing over XEN? See http://www.redhat.com/promo/qumranet/ <snip> Q: Will Red Hat continue to support and contribute to Xen? A: Yes. Red Hat will support Xen until at least 2014 (seven years after the release of Red Hat Enterprise Linux 5). We are committed to insulating our customers from changes in the infrastructure components and this is why we

Do people have wet underwear for nothing over XEN? See http://www.redhat.com/promo/qumranet/ <snip> Q: Will Red Hat continue to support and contribute to Xen? A: Yes. Red Hat will support Xen until at least 2014 (seven years after the release of Red Hat Enterprise Linux 5). We are committed to insulating our customers from changes in the infrastructure components and this is why we

All, I have a fresh CentOS 5.2 server that I am just starting to customize, it is very close to stock. This morning I ran yum update: ============================================================================= Installing: kernel-xen i686 2.6.18-92.1.6.el5 updates 15 M Updating: samba i386 3.0.28-1.el5_2.1 updates 16 M

Hi How I can configure sshd_config to improve the ssh faster? It is slow to prompt the login Thank you

Performing a test install of CentOS 5, I no longer have the capability of requesting a minimal install as their was in CentOS 4. Is there any possibility this could added back in before final release? Thank you, Brett

I am playing around with Zimbra. For the install, I selected the Fedora 11 version for x64. I am running: Linux 2.6.18-164.el5 #1 SMP Thu Sep 3 03:28:30 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux When I install I get an error: This platform is CentOS5_64 Packages found: F11_64 This may or may not work. Installation can not continue without manual override. You can override this safety check

I've got a bit of a problem with Samba. I just can't work out how to change passwords or remove users. I've just got user security.. lines in smb.conf are: security = user passdb backend = tdbsam I've removed the user using pdbedit, I've removed the unix user, smbpasswd says the user doesn't exist yet I can still connect to the shares. I'm

I'm hoping that someone on this list can shed some light on how Linux/CentOS decides which IP address to report when a Windows desktop attempts to access it via SAMBA/WINS. The CentOS system in question is running a single NIC and OpenVPN which adds two additional virtual NICs. This is a backup system, there is another CentOS system that acts as the primary VPN server. The local NIC is

All, After many hours of research I have found there is a incompatibility between OpenLDAP V2.3.x and V2.2.x, or atleast between V2.3.27 the current version on CentOS V5 and V2.2.13 the current version on CentOS V4. The syncrepl feature of OpenLDAP, to keep multiple slapd servers sync'd, was working between CentOS 4 and 5 at one time, as that is how I populated the "slave" servers.

All, I have CentOS 5.2 XEN guests running on a CentOS 5.2 host. At one time when I issued an 'init 6' in one of the XEN guests it rebooted Now it seems to halt but virt-manager shows it as still running and the only way to get the guest to boot is to destroy the virtual machine and start it again. Unfortunately I didn't notice precisely when this change in behavior occurred, I

Hi Guys, I would like advice for best practices to secure my linux boxes. Know if I have been hacked, know of security breaches, etc. Can anyone provide advice? -Jason

Hi All, What tips does everyone have on hardening a CenOS Server that is running web, e-mail, ssh, ftp, mysql, coldfusion and will be processing payments from www? -Jason