We use powerpath on RHEL servers, with at least 2 paths to each disk, as you know the powerpath creates a pseudo devices called emcpowerX. I was wondering if there is any overhead if we don't use the lvm.conf to filter out all sdX disks? Except the "duplicate PV found" messages on LVM, does it delays the boot of the server?
View 1 RepliesIn our environment we are using EMC for storage. We are using Qlogic provided drivers and PowerPath and the OS is RHEL5.3. Currently we have 2 Luns connected in one of our server (emcpowera & emcpowerb) and storage team has allocated another 100Gb Lun to that system, my doubt is if I execute "ql-dynamic-tgt-lun-disc.sh" script that would be enough to detect the Lun and see the device under /dev/ as emcpowerc or I need to execute "powermt config" and "powermt save" commands also.
View 3 Replies View RelatedI am setting up an nfs failover node. The NFS servers share out mounts to a SAN. My problem is this: the master node has
emcpowera as the 100 gig partition
emcpowerb as the 200 gig partition
emcpowerc as the 300 gig partition
and the failover node has
emcpowerc as the 100 gig partition
emcpowerb as the 200 gig partition
emcpowera as the 300 gig partition
This is no problem until the failover node takes over the duties of nfs. The nfs clients that were connected to the share that map to emcpowerc on the master now for some reason map to emcpowera. I had a look and see that powermt is responsible for the pseudo naming of the devices. How do I change the pseudo names for the SAN on the failover node to match the emcpower# (a,b,c) on the Primary node?
what distro do you recomend to use creat a server to filter and cacheall internet activity?
this is for a cybercafe each pc will have some restritions others not
We have a CentOS server which has beed restarted due to some reason. Now we have ping to the server and we can reboot it via KVM, but the server loads to some messaageThis is filter.unknown_domain (Linux ...)Filter Login:and then it stops. Do you have an idea what might be the problem and how can we fix it?
View 2 Replies View RelatedIm currently serving a web in apache2; no problems I recently set up squid to filter internet for my LAN users.
***i dont want squid to accelerate WEB requests in my apache2.
So the problem is that SQUID blocks my 192.168.1. LAN denied attemps, so far, its ok BUT IT ALSO BLOCKS ANY OF THE INTERNET USERS TRYING TO REACH MY HOSTED WEB.
Can i have both servers in the same box without interferring each other?
I have a very simple set up.With Network Manager I can have my laptop act as a router (sharing all connections).I also have apt-cacher-ng as a debian package cacher.I would like to set up iptables to filter only the urls that are meant for a debian package cacher.
For example:I could use a "forward all" rule:
Code:
iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 80 -j REDIRECT --to-port 3142
Except then I would get a bunch of error pages every time I tried to do normal navigating.My question (again) is: Can iptables handle forwarding only on a specific url? If so how?Or is there another solution? (prferably without full fledged software like squid)
Where I work, the IT people have the systems setup (wrongly in my opinion) to require not just the user's username but to have the username pre-pended with regional info. Like this:Username: RegionName//UserNamePassword: ********The server I maintain doesn't require this (even though I have it authenticate through the same services as the rest of IT (active directory via ldap))The problem is I see lots of authentication errors in my apache error_log file because people are using the RegionName//UserName login
View 1 Replies View RelatedI'm trying to set up an mail filter for our domain. At the moment we're using ClearOS as the filter, works OK but I still get something through and the blacklist and whitelist doesn't seem to work. I was hoping to set up a mail filter on my own, using Spamassassin and/or something else. It seems I have to buy subscription at ClearOS to make it update better or something. I might just do that, it's just tempting to find a way to do it on "my own". I tried to follow these instructions but I don't seem to go anywhere... ...I began with setting up the base server as it is shown there. I've setup quite a few Linux servers, mainly as firewall/gateway kind of things but also some DNS servers, web servers and so on.
I have one mail server and the mail filter is supposed to be on the outside to filter mail before it hits the mail server.
I've got two files. They both contain package names. Is there any way I can go through the package list on one file, and search to see if each package exists in the other file? What I'd want to do, is if the package name is found in the the main file, then go to the next line. If its not found then print that package name to another file.
I know you can use diff, but it doesn't seem to be that straight forward. As I understand it diff searches line by line, so if line one doesn't match line one in another file, then it prints it out. That's not exactly what I want.
I just really need an easy way to filter out the additional packages that exist on a new server. If I have a list of packages that aren't on the original server, then i can just delete them.
Not sure if I've made any sense but there must be a quicker way to do what i need to. It would take me ages to scan manually through the package names in each list, and highlight the ones i dont need.
I want a mail server that can work just like MDaemon. The reason is, I want to have an email content filter rule that does some thing like this.
1. If the To Header contains "support@thisdomain" then run a program.
What this means is that, there is a program here in the office, and if some one sends an email to the support address, with an attachment of .exe and that person is a customer, then the program should be run. The only thing I need here is if there is a rule or script that can filter email header and run a program.
2. If the Exit Code from a previous 'Run program' rule is in the range of 1 to 100 and if the To Header contains "support@thisdomain" then send note1 "to<email address>" from <$SENDER$" "SUBJECT <AM ...>
and delete this message.
3. If the EXIT CODE from a previous 'Run program' rule is =0 and if the TO HEADER contains "support@thisdomain" then send note1 "to<email address>" from <$SENDER$" "SUBJECT <AM ...>
and delete this message.
I have a setup of squid3 with ntlm authen and I use squidGuard 1.5 to filter my web traffic. My squid3 is authenticating users properly and parsing all rules. The problem is with squidguard which doesn't seem to filter out users. below is my squidguard config.
Code:
dbhome /usr/local/squidGuard/db
logdir /usr/local/squidGuard/log
[code]....
I am new comer in this forum and the beginner on freeBsdI have a problem on how to implement the spam filter program on mail server, the problem is i have no idea on how to implement and test the spam filter program on the mail server and where should i put the program? is it in pop3?
View 3 Replies View RelatedPlease what will it take me to write a perl full functioning program to filter emails for specific rules? Will that be possible? The actual thing am trying to get is to write a perl program and attach to a mail server so that, when the mails come in, the perl script get call and then the perl program will let another external program that is not on the server run and check or filter the mails.
View 8 Replies View RelatedIm trying to get postfix to filter my outgoing mail and basically drop everything that is not in my hash table.
So far I managed to get this going
Code:
Code:
Unfortunately those rules also apply to incoming messages. My goal is to disallow users on my host to change their "MAIL FROM" to anything they like and restrict them to domains I specify. I'm aware that the local part still is variable and a user of domain "foo.com" could use a email of domain "bar.com", but still some of my troubles would be solved if I get this running.
I've been looking for a way to filter out emails on my postfix server by GeoIP data. I couldn't find anything that fitted the bill so wrote my own in Python as a postfix policy. Thought I'd post it here to see if it's of any use to anyone else. I've attached a tar of the files as the Python formatting will get mucked up by the forum code. Comments/improvements are welcome (be kind ) First file is : policyd-geoip which is owned by root:root and placed in /usr/bin with 755 perms
[Code]...
I want to filter and block failed attempt to access my proftp server. Here are few line from the /var/log/secure file:Quote:
Jan 2 18:38:25 server1 proftpd[17847]: server1.XYZ.com (93.218.93.95[93.218.93.95]) - Maximum login attempts (3) exceeded
Jan 2 18:38:27 server1 proftpd[17864]: server1.XYZ.com (93.218.93.95[93.218.93.95]) -
[code]....
We have MS Exchange email server with postfix/amavis on FreeBSD as proxy for anti-spam and anti-virus. We use our own developed CRM and trying to implement such functionality that when CRM manager send email to CRM client or vice versa through email client like Outlook (no plugins for CRM) this message would be shown in CRM. There is already a solution to parse emails from specific emailbox and show it in CRM.
What I need is to create postfix email filter to check if sender email is in file CRM_managers_emails and recipient email is in file CRM_clients_emails then forward that email to [URL] Filter should check both incoming and outgoing messages. I will auto generate CRM_managers_emails and CRM_clients_email files containing all such emails taken from CRM database. I know i should use something like Postfix After-Queue Content Filter but most of examples are for blocking emails.
I have servers which contain SATA disks and SAS disks. I was testing the speed of writing on these servers and I recognized that SAS 10.000 disks much more slowly than the SATA 7200. What do you think about this slowness? What are the reasons of this slowness?
I am giving the below rates (values) which I took from my test (from my comparisons between SAS 10.000 and SATA 7200);
dd if=/dev/zero of=bigfile.txt bs=1024 count=1000000 when this comment was run in SAS disk server, I took this output(10.000 rpm)
(a new server,2 CPU 8 core and 8 gb ram)
1000000+0 records in
1000000+0 records out
1024000000 bytes (1.0 GB) copied, 12.9662 s, 79.0 MB/s (I have not used this server yet) (hw raid1)
[Code].....
I have/had a PC with several hard drives, and a mix of ubuntu and windows on multi boot.The old boot drive died screaming, and I need to start again. (But my data is safe! yay!)
Is there anything special about which drive can be the main drive to start booting from? Or to put it another way, can I install to any of the other 3 and expect it to work, or do I need to switch them around so a different drive is on the connections for the recently dead one?
I followed this How To (https://help.ubuntu.com/community/Postfix) in order to add smtp authentication to my Postfix installation used as spam filter for my exhange server, and it'seem all ok; the only thing that I don't understand is where I list all the users (with passwords) that I authorize to send mail through my server...
View 3 Replies View RelatedFilter access server through the net only to authenticated users from domain controller (Win2k). Server (Centos)(Firewall with 2 nic), which makes access to the net, with only 196MB RAM (PIII500Mhz), so I do not want a solution based on proxy or what resources it uses large I want a solution with a script that runs at login on windows this check series HDD and to communicate with Linux server that's open accessor another simple solutionNow just use only MAC filtering on
View 1 Replies View RelatedA small combined webserver and fileserver with focus on power consumption and storage size, what would be a cheap and stable solution to this in terms of hardware ? I'm not interested in NAS solution only servers ..
View 1 Replies View RelatedI have built a couple RAID's, but I'm uncertain of how I should format the partitions of the raid. Should I format partitions on each disk, and then add them to a raid, or should I create a raid on unformated disks and then format the raid as a partition? Does it matter, and are there performance/reliability issues? I'm creating a RAID-5 using 3 SATA disks on RHEL for user data area.
View 5 Replies View RelatedCan a Mac Mini, Server edition, be booted off either of its two disks?
I'm interested in having one disk with OSX Server on it, and the other a dual boot Linux/Windows, to get around OSX's fussiness about boot loaders.
I am connecting a complete set of four hard disks externally to my linux server.I have certain queries on that
1. How to make it detected. Will the cd which had come with that will install the required drivers?
2. How the cd drive will work out in linux?
3. How to configure all the 4 HDD into one LVM?
4 How to remove an already installed software from a linux system?
For some reason we have some network storage not mounted properly after an unexpected restart (ie OS or memory issue) and the subsequent reboot. Has anyone come across this before? It's a bit strange that certain disks are not mounted.Anyway, to detect this, can we insert an extra line into the /etc/inittab to perform post start checks. For example, I have inserted an extra line before the runlevel scripts in /etc/inittab file.
The line will call /usr/local/fstab-check.sh to perform a check on the disks mounted via /etc/fstab. Am thinking of comparing the output from the command "df" versus the content of /etc/fstab.
I'm attempting to do a low level wipe of a server in our office. I originally attempted to use DBAN but it wouldn't recognize the disks.
I've now moved on to attempting to use a Live Boot of Ubuntu 10.10 on a USB drive.
I'm using the following terminal command - sudo dd if=/dev/urandom of=/dev/sda bs=1M
When I did this the first time it simply wiped the USB drive that had Ubuntu on it.
What do I need to do in order to have it wipe all 4 disks on the server instead of the USB Drive?
So, I have raid5 array with one spare disk. Is it possible to spin-off/shutdown the spare disk until one drive fails and the spare disk is needed?
View 1 Replies View RelatedI have to move all the files and directories between 2 file systems. Is it good practice to move them at once or first copy them and then move ? How to do this to preserve the permissions and directory structure ?
View 3 Replies View Related