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Aug
29
comment How to assure that Redhat and Ubuntu servers have the same packages and configuration?
It's not really difficult as the OS is already automated, for many services over there
Aug
29
comment How to assure that Redhat and Ubuntu servers have the same packages and configuration?
I used gPXE to boot it via KVM and for config it replicates MySQL and Filesystem like Apache vhosts files, postfix aliases, bind domains, haproxy, nginx, varnish, ntpd, dovecot, spamassasin, clamav, rsyslogd, takes 20min to build and it's using RPMs only like EPEL, Remi and Centos Plus, with crypted volume for /home only
Aug
29
comment AWS EC2 security group source
Are you doing port 1433?
Aug
29
comment How common (or uncommon) is using full email address for email login?
It's because companies are changing their aliases, so because not to confuse with usernames, and the accounts, the login traditionally is done via username and not email alias.
Aug
29
answered Dovecot/Postfix with SSL on EC2
Aug
28
comment Virtual hosts & symbolic links, why can't I set DocumentRoot to a symbolic link?
This can be permission on one of the sub-folders of the destination of the link, as symlink is always rwxrwxrwx, so you need to grant your apache access to it.
Aug
28
comment iptables: No chain/target/match by that name.
OMG, just modprobe ip_conntrack and it should load it all
Aug
28
comment Secondary IP (eth0:0) acts like main server IP
Try ip ro li and see what is your src
Aug
26
accepted DNS Load Balancing over 20 servers with sticky session and security
Aug
25
accepted How to assure that Redhat and Ubuntu servers have the same packages and configuration?
Aug
25
asked How to assure that Redhat and Ubuntu servers have the same packages and configuration?
Aug
25
revised Setting wget permission to 755 so users other than root can execute it a big security risk?
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Aug
25
answered Setting wget permission to 755 so users other than root can execute it a big security risk?
Aug
21
comment How to cope with 10,000 people accessing a webserver in an hour?
You need to introduce layers of cache to all the wordpress websites affected. For example, Varnish and modified Wordpress headers can speed up the website up to 1GBps output without crashing, you just move varnish to another ip number and the domains, and forward traffic to wordpress server.
Aug
20
comment Risks of Network Partitioning When a Split Brain Creates a Security Flaw
For the availability layer above, one can do double internet connection and redundant servers, and this does the job most often, when the data is flowing upstream, but distributed I really think this is just an headache, I prefer to make it a tree, however this is not easy
Aug
18
comment Risks of Network Partitioning When a Split Brain Creates a Security Flaw
Like MySQL replication would work like this, but when you query MySQL in US and Japan, you need to lock the record in every location, and re-synchronise after shutdown.
Aug
18
comment What's so wrong with the ML350 G5?
There is no difference except the performance. Also check if this G5 will handle SATA III drives > 2TB with firmware upgrade.
Aug
18
comment Risks of Network Partitioning When a Split Brain Creates a Security Flaw
It is possible when one client does it from US and another from Japan. Two nodes can be geographically displaced and fully addressable in this case. When doing such money transaction, the easiest is to use central memory - SQL with transactions, and if it's unreachable, then it's failed.
Aug
18
revised Risks of Network Partitioning When a Split Brain Creates a Security Flaw
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Aug
18
comment /proc/loadavg shows incorrect huge values
This is Cloud Linux kernel for Centos 5, you could report it there, as well what hardware are you using.