tike's questions

i have apache config in ec2 instance as:

        RewriteEngine On 
        ProxyPreserveHost On 
        ProxyRequests On 
        ProxyPass /blog http://212.128.122.142/blog

this works until i point my dns record to ELB but not if i change my DNS to point at CDN. either i get 502 or redirect loop.

I also tried rewrite rule as i saw 502 bad gateway was because CDN tries to access as myendpoint.elb.amazonaws.com/blog and that wont be served by Apache, so, i changed so that apache accepts orgin endpoint as serverAlias and rewrite cond to rewrite url back to original hostname, and passing it to IP with proxypreserve.

RewriteCond %{HTTP_HOST} !^(www\.)?mydomain\.com
        RewriteCond %{HTTP_HOST} ^myendpoint.elb.amazonaws.com$
        RewriteRule ^/blog http://mydomain/blog[R,L]

(i need to access /blog from different server hosted with same domain. And as mentioned above it all works until ELB is pointed to DNS Record but stops on CDN any heads up?)

What i am trying to achieve: host /blog in different server having this all working with cloudfront in top of ELB

I have been working to integrate application logs with the ossec logcollector.

I have successfully created, decoded, command, rules etc, and everything works and fires triggers.

However our application rotates logs, and doesn't create log until that particular incident is triggered. And ossec-logcollector would not read new files.

There are various ways I could do but not so ideal.

1. Touching files and restarting ossec-logcollector everyday.
2. Cronjob to restart ossec-logcollector every 10 min [ok this will again be non-realtime].
3. Write script which checks when those files were created and if new restart ossec-logcollector. I haven't figured this out yet, but I think its possible.
4. Check for diff using ossec command using wc -l, if there is new files write script as fire rule and restart ossec-logcollector.

But is there any better way of doing this in ossec? Or is there any way to enable ossec-logcollector to check new files too?

using: varnish-3.0.4

can anyone suggest potential cause of backend connection failure, this normally happens when N-Worker_thread goes anything above default of 100 worker_thread(not necessarily all the time)?

In one of the several case, While trying to create 491 thread in peak it was unable to connect to backend. whereas, backend servers were not in load or anything. To narrow down issue its not problem with backend server as it healthy and reachable.

backend_unhealthy            0         0.00 Backend conn. not attempted
backend_busy                 0         0.00 Backend conn. too many

As i understood, "backend conn. failure" is oppse to configuration 1) Thread max is 1000 * 2[pools], 2) Server load is below 1

Theoretically it should be able to handle that many spikes, And i would not see why backend would fail here.

[NOTE, Due to demand of use, it is designed to cache 1s to 5s at most]

n_worker_thread = 100 , all good

n_worker_thread = 491 , 8 backend_connection failure.

varnishadm

thread_pool_add_delay       2 [milliseconds]
thread_pool_add_threshold   2 [requests]
thread_pool_fail_delay      200 [milliseconds]
thread_pool_max             1000 [threads]
thread_pool_min             50 [threads]
thread_pool_purge_delay     1000 [milliseconds]
thread_pool_stack           unlimited [bytes]
thread_pool_timeout         120 [seconds]
thread_pool_workspace       65536 [bytes]
thread_pools                2 [pools]
thread_stats_rate           10 [requests]

varnishstat

32+03:45:05
Hitrate ratio:        2        2        2
Hitrate avg:     0.9404   0.9404   0.9404


backend_conn           4516262         1.63 Backend conn. success
backend_unhealthy            0         0.00 Backend conn. not attempted
backend_busy                 0         0.00 Backend conn. too many
backend_fail              9562         0.00 Backend conn. failures
backend_reuse         67350518        24.24 Backend conn. reuses
backend_toolate         361647         0.13 Backend conn. was closed
backend_recycle       67715544        24.38 Backend conn. recycles
backend_retry             5133         0.00 Backend conn. retry
n_backend                    5          .   N backends
backend_req           71855086        25.87 Backend requests made
LCK.backend.creat              5         0.00 Created locks
LCK.backend.destroy            0         0.00 Destroyed locks
LCK.backend.locks      149007648        53.64 Lock Operations
LCK.backend.colls              0         0.00 Collisions

Could anyone explain the behavior of DNS slave?

I am testing DNS server, for internal purpose, and after configuring master slave everything works fine, but I am willing to understand the mechanism behind,

Lets say,
dnsmaster.net and dnsslave.net [my 2 DNS]

However, I wanted to make dnsslave to be available to serve query if dnsmaster.net is down. [well it works until now]

Having said that, I want to update records on dnsslave.net [while dnsmaster.net is down].
I can resolve things from DNS slave but turning off master and updating records, but not until I restart dnsslave.net.

So, is this something caused by, expiry time on soa?

                            43200      ; refresh (12 hours)
            900        ; retry (15 minutes)
            1209600    ; expire (2 weeks)
            300        ; minimum (5 minutes)

EDIT: I know what is the purpose of DNS master and slave, I am talking while dnsmaster is down, slave is only in use and I need to update A record. [at this condition DNS doesn't work with reload it only works on restart, so anyone with better knowledge and experience please share your view.]

I am trying to setup a redirect/rewrite so that the urls end with / (trailing slash) (for making seo friendly).

However there are other internal rewrites, which are not shown in the browser address bar. I want to be able to redirect first with trailing / on the address bar and then perform those internal rewrites.

when i try to put this rule at the start, all the internal rewrites get displayed in the address bar :

Currently i have rewrite rule :

`url.rewrite-once = (
^/([0-9_-]+)(?:\?(.*))?" => "/path/www/index.php?cmd=alias&target=$1&$2",
<second condition> => <relative uri>
<third condition> => <relative uri>
 )`

Here is the rule i wanted to add.

Rule used: url.redirect = ("^(.*[^/])$" => "$1/")

But this also shows my internal path on url. e.g: www.tikejhya.com/path/www/index.php?cmd=alias&target=hellow/world&/

I just want to add a trailing slash ( in the address bar-visible) , leaving every thing else untouched.

FYI: my modules are in correct order too, i tried guglling (mod_rewrite/ fastcgi and alias with redirect) Any pointers in the right direction would be highly appreciated.

I am working with asterisk (Asterisk 1.8.11.0), freepbx (2.x) and was building a dialplan (extension_custom.conf).

I wanted to get caller Name from database which i have stored for example.

CLI> database show cidname
/cidname/XXXXXXXXXX                             : Tikejhya

And i am able to get caller number, and also caller name but static way. [I am well aware that freepbx supports phonebook but my requirement is to get that before it hits context]

; This gives you Number of Caller exten=> _.,n,Log(NOTICE, "Incoming CallerID Number: ${CALLERID(num)}")

; This gives you Name of Caller
exten=> _.,n,Log(NOTICE, "Caller name:                  ${DB(cidname/XXXXXXXXXXX)}")`

And now my goal was to get that Caller name using 
`exten=> _.,n,Set(CALLERID(name)=${DB(cidname/${CALLERID(num)})})

However this seems not to provide value that i would expect to get which is XXXXXXXXXXX

Am i doing anything wrong. (I am trying to do this because i need it before going to relevent context.)

My environment: Centos 5.6, Asterisk with freepbx , skype i.e.sends message with parameter skype.sh skype_user message.

Now i wanted to send skype notification so that my asterisk server notification are sent to skype rather than email (or to both skype and email).

I know, there is voicemail.conf, voicemail_general and vm_email.inc, which has these body created.

vm_email.inc

emailbody=${VM_NAME},\n\nThere is a new voicemail in mailbox ${VM_MAILBOX}

But i dont see where is something like "mail" command.

What my thought to do is: instead of saying "mailcmd" pass system ( /path/to/script) and it would simply send message as rest is already configured.

Any suggestion where i could run script rather than sending email Or Executing script on every incoming call, so that i could send as notification on every call over the Skype. (however, ultimate goal is to achieve miss call notification or voice mail notification over Skype.)

We are currently using amazon CloudFront to serve css and according to Amazon itself, Amazon CloudFront can serve both compressed and uncompressed files from an origin server. But while i check compression it shows everything fine in origin server but it shows notcompressed checking in the link with cloudfront.

e.g. http://www.port80software.com/tools/compresscheck.asp?url=http%3A%2F%2Fimgsrv.mydomain.com%2Fen-UK%2Fsomething.css

it would result with Compression status: (gzip)

while with cloudfront

http://www.port80software.com/tools/compresscheck.asp?url=http%3A%2F%2hereisit.cloudfront.net%2F%2Fsomething.css

Compression status: Uncompressed

Origin server is running lighttpd with mod_deflate however, allowed config is:

deflate.allowed_encodings      = ("bzip2", "gzip", "deflate")

[i would think, putting extra allowed encoding wont affect as such.]

Here i am clueless, what is the real issue.

I was trying to install qmailtoster in my centos server, i did all of the following not for once but repetitively as i got error and continued but i felt i need some help.

i did follow all the steps of this wiki documentation.

http://wiki.qmailtoaster.com/index.php/CentOS_5_QmailToaster_Install#Begin_Install

followed all procedure when i came in a point to install i always got this error.

cnt50-install-script.sh: line 80: rpmbuild: command not found 
error: File not found by glob: /usr/src/redhat/RPMS/i386/daemontools-toaster*.rpm
Installing ucspi-tcp-toaster . . .
Shall we continue? (yes, skip, quit) [y]/s/q:
cnt50-install-script.sh.4: line 90: rpmbuild: command not found
error: File not found by glob: /usr/src/redhat/RPMS/i386/ucspi-tcp-toaster*.rpm
Installing vpopmail-toaster . . .
Shall we continue? (yes, skip, quit) [y]/s/q:

any suggestions please?

I am trying to configure DNS to run two domain names. I am able to do one domain but am not sure how to configure a second domain.

So for example: test.com and test1.com on same machine.

How do i configure zone file and named.conf to achieve this?

i have a issue related to dhcp i have configured my dhcp according to my ip and all ...

but it fails. when i try to start the service...

i tried to trouble shoot and i stopped the firewall (iptables) i disabled selinux.

is there any other area i need to consider.. is there anything that stops dhcpd service to start from.