Server Circle - Member profile for HarryP

HarryP's profile (1344 points)

About: I like servers and anime.

Ubuntu Precise LTS upgrade

Asked in: Ubuntu Linux with 0 answers

Latest Adobe Flash Media Server version on AWS

Asked in: Cloud Servers with 1 answers

Understanding Apache expolits

Asked in: Linux Servers with 1 answers

Earthquake effects on North East US AWS

Asked in: Cloud Servers with 1 answers

EC2 EBS volume showing error state

Asked in: Cloud Servers with 1 answers

Inserting an advert on a flash media server

Asked in: Linux Servers with 3 answers

Difference between a symbolic link and a dynamic link

Asked in: Linux Servers with 3 answers

funny errors from named

Asked in: Linux Servers with 3 answers

Safe blog software written in PHP

Asked in: Programming with 2 answers

Function in PHP without Curl to get tinyurl to work

Asked in: Programming with 1 answers

Repairing MyISAM MySQL database tables

Asked in: Linux Servers with 1 answers

Is Dummynet a decent alternative to IPtables ?

Asked in: Server Firewalls with 2 answers

Adding a mod_rewrite to stop 404s

Asked in: Linux Servers with 3 answers

Amazon EC2 and Rackspace with multiple database instances

Asked in: Cloud Servers with 0 answers

Site running slower on lighttpd than Apache

Asked in: Linux Servers with 1 answers

Results from mod_rewrite for clean URL titles from htaccess file

Asked in: Linux Servers with 1 answers

Linux ngrep to filter packets for sniffing ethernet multicast packets

Asked in: Linux Servers with 1 answers

Smokeping upgrade issue causing problems

Asked in: Linux Servers with 0 answers

Experiences and stats for reduced redundancy on Amazon S3

Asked in: Cloud Servers with 0 answers

Without using secondaries best way to sync djbdns DNS servers

Asked in: DNS Servers with 1 answers

Amazon EC2 data for how reliable each region has been

Asked in: Cloud Servers with 0 answers

Using mod_rewrite to jump from jpg to png image files in Apache

Asked in: Linux Servers with 1 answers

Best cloud service for backing up to from a server

Asked in: Cloud Servers with 1 answers

Guide to building your own Ubuntu cloud

Asked in: Ubuntu Linux with 1 answers

Should I put everything static in a CDN to lower Apache load ?

Asked in: Linux Servers with 1 answers

Coverting and resizing images on Linux on a web server

Asked in: Linux Servers with 3 answers

SSH login redirect to another server

Asked in: Linux Servers with 1 answers

Decent switch capable of port mirroring without slowing down

Asked in: Networking with 1 answers

Counting a set number of packets in tcpdump

Asked in: Debian Linux with 2 answers

Need to backup OpenVZ containers

Asked in: Virtual Machines with 1 answers

Apticron on a Debian Server and an Ubuntu Server

Asked in: Debian Linux with 1 answers

Packet loss across the Internet

Asked in: Debian Linux with 1 answers

Web mail server

Asked in: Debian Linux with 1 answers

Ksplice and Uptrack reboots

Asked in: RedHat Linux with 1 answers

MYSQL database servers - Slave to Master upgrade or swap

Asked in: Cloud Servers with 1 answers

MYSQL slaves and masters

Asked in: Cloud Servers with 1 answers

Use tcpdump to only capture SYN packets

Asked in: Networking with 1 answers

Encrypting data and sending it to S3

Asked in: RedHat Linux with 1 answers

MYSQL first row missing

Asked in: Programming with 5 answers

OpenVZ memory allocation

Asked in: Virtual Machines with 3 answers

Using rsync to copy whole drive from remote server

Asked in: Suse Linux with 1 answers

Limit number of login password characters in Ubuntu

Asked in: Ubuntu Linux with 4 answers

Browser compatibility of Round Robin DNS

Asked in: DNS Servers with 6 answers

Logrotate rotation on size and not numbers of days or weeks

Asked in: Linux Servers with 2 answers

Ubuntu Bash Completion failing after recent (unknown) update

Asked in: Ubuntu Linux with 4 answers

REWARD: SSH logins are incredibly slow

Asked in: Networking with 8 answers

How can I measure packet loss ?

Asked in: Networking with 6 answers

Comprehensive list of working RBLs for Mail Server

Asked in: Email Servers with 4 answers

Disk errors

Asked in: Linux Servers with 4 answers

Is Uptrack really reliable enough for production servers ?

Asked in: Linux Servers with 2 answers

Three Database Servers, Two Web Servers. Best MYSQL config ?

Asked in: Linux Servers with 0 answers

RSS Server from my site

Asked in: Shell Scripting with 3 answers

Best DNS Server to use BIND and TinyDNS ?

Asked in: DNS Servers with 3 answers

How do I insert an advert at the start of a flash stream? Thanks.

Asked in: Linux-Servers (3 answers)
HarryP's response: Yes, it is ! Look up FMS from Adobe please. Thanks.

I get weird errors when I try and start a new install of named:

/etc/named.conf: unknown option 'zone'
/etc/named.conf: unknown option 'logging'

Any help appreciated.

Asked in: Linux-Servers (3 answers)
HarryP's response: Thanks to you both, from your answers I fixed the syntax problem.

I wrote a server-client socket program to fix a problem that I've faced. Sometimes my server side doesn't get packets from client side though. I've been told I should track it by "nc -l [port-No]" which this command doesn't work in my Ubuntu 10.10. 1: Is there another way to listen my server side and send packet to that side? 2: how can I do correct my nc -l [port-No]?

Asked in: Server-Networking (5 answers)
HarryP's response: Yes, it depends if you want just see traffic being generated (use iftop to see which ports the traffic uses) or if you want to drill down into the traffic use a sniffer like tcpdump.

How can I log exactly what in and out traffic is per IP address ? I have a few IPs on a server. Thank you for any help.

Asked in: Linux-Servers (2 answers)
HarryP's response: You could look at iptraf or maybe ifstat (which is probably just per interface).

I've heard horror stories about some versions of PHPMyAdmin. How do people secure it completely so it never gets hacked ? Thank you.

Asked in: CentOS-Linux-Servers (1 answers)
HarryP's response: You can use disable_functions in php.ini and .htaccess restricted by IP address.

Are there production experiences with Dummynet (the alternative to iptables) ported from BSD ? I've read that it's really good but not ready for production. Thanks !

Asked in: Server-Firewalls (2 answers)
HarryP's response: Really appreciate the input, Jim. Thanks very much.

What do i need to install before installing SysAid? I guess a web server is required but is there something else? Does SysAid works with XAMPP (for Windows)? Thanks for helping.

Asked in: WindowsServers (2 answers)
HarryP's response: This should give some idea: http://lw5.ilient.com/down/installation_guide.PDF It's from a German site but is in English.

How can I make sure root definitely can't login? Thanks.

Asked in: Linux-Servers (5 answers)
HarryP's response: Jim is quite right - for simplicity you can switch this off in /etc/ssh/sshd_config usually - following Jim's recommendations.

I'm getting loads of hits from robots on a directory that no longer exists called /dev. Can I use mod_rewrite to forward hits for ANY PAGE the robots are looking for up a level ? Like this: From: http://www.domain.com/dev to: http://www.domain.com Thanks for any help.

Asked in: Linux-Servers (3 answers)
HarryP's response: In case it helps someone else this did it in the end: RedirectMatch 301 ^/dev/(.+)$ http://www.mydomain.com/$1 I think I could remove the mydomain.com bit quite easily but this is a temporal fix hopefully so that's fine.

Asked in: Linux-Servers (3 answers)
HarryP's response: Thank you !

I want to configure email2sms gateway server on Ubuntu. I have already SMS Gateway Server (Kannel SMS Gateway) based on Ubuntu and connected with SMPP Connection of Mobile Operaters. Can you please give me some guidelines ?

Asked in: Linux-Servers (1 answers)
HarryP's response: This should help because it's based on Debian: http://sundae.se/2005/05/08/how-to-create-an-email2sms-gateway/

I've been told to measure how many Amps my server pulls at boot time and when it's busiest for my colocation ISP. Where can I get a cheap ammeter to do this ? Thanks.

Asked in: Linux-Servers (2 answers)
HarryP's response: This should help, from Maplin in the UK: http://tinyurl.com/63kkhee

Is it better to completely duplicate an EC2 set up in another region so that you can avoid the outage that affected lots of availability zones in April ?

Asked in: Cloud-Servers (1 answers)
HarryP's response: It's worth aiming for multi-region for some things and using at least two zones for everything else IMHO.

I can't get tcpdump to stop sniffing the network after a certain number of packets. The man page says it's possible but the syntax is obviously tricky. It's Debian if you need to know. Can anyone else tell me please ?

Asked in: Debian-Linux-Servers (2 answers)
HarryP's response: Thanks ! I had -c100 and another part of the command line was broken :( Fixed.

Please let me know What exact step to set up Mysql Cluster server OS : Linux 5 Mysql: 5

Asked in: Linux-Servers (2 answers)
HarryP's response: You could try running through this HOWTO: http://dev.mysql.com/tech-resources/articles/mysql-cluster-for-two-servers.html

What's the best way to split up 4GB of RAM between the host and VMs ?

Asked in: Virtual-Machines-Servers (3 answers)
HarryP's response: Thanks. I need two smaller VMs a a larger one but will a VM run consistently in only 1GB of memory okay ?

Why would a SELECT query drop the first entry in a row ? It's in a while loop. Sorry it's a bit OT. Thanks.

Asked in: OtherProgramming (5 answers)
HarryP's response: Thanks for both responses. Exactly what the problem was ! Doh.

Why would a SELECT query drop the first entry in a row ? It's in a while loop. Sorry it's a bit OT. Thanks.

Asked in: OtherProgramming (5 answers)
HarryP's response: Thanks, here the code:


$result = mysql_query("SELECT * FROM something ORDER BY BBB desc limit 20")
or die(mysql_error());
$row = mysql_fetch_array( $result );


  while($row=mysql_fetch_array($result))
   {

$second = mysql_query("SELECT * FROM nothing WHERE AAA='".mysql_real_escape_string($row[AAA])."' limit 1")
or die(mysql_error());
$secondrow = mysql_fetch_array($second);

print (" $secondrow[5] ");

   }

Is it the mention of $result at the start of the while loop ? Ahh, you look at something for ages and can't spot it ...

I'm looking for ways of testing global connections. Anyone got any favourite sites for running traceroutes ? traceroute.org is a bit outdated.

Asked in: Server-Networking (3 answers)
HarryP's response: I still love http://visualroute.visualware.com/ and it's got more features recently. From your command line though try MTR: http://en.wikipedia.org/wiki/MTR_(software)

I've heard good and bad things about PayPal but I'm looking for something really easy with PHP. Can someone please help ?

Asked in: OtherProgramming (2 answers)
HarryP's response: Sagepay and eWAY are well regarded: www.sagepay.com www.eway.co.uk

What's the consensus ? Do people keep this enabled on Servers ? It seems it might cause untold problems and be tricky to diagnose problems against.

Asked in: Ubuntu-Linux-Servers (3 answers)
HarryP's response: I second that, I also switch it off by default, mainly to help diagnose problems.

Are all modern browsers capable of using Round Robin DNS now ?

Asked in: DNS-Servers (6 answers)
HarryP's response: I found this after some more hunting: http://homepage.ntlworld.com/jonathan.deboynepollard/FGA/dns-round-robin-is-useless.html

Are all modern browsers capable of using Round Robin DNS now ?

Asked in: DNS-Servers (6 answers)
HarryP's response: Thank you for the help. I read somewhere that older Internet Explorer browsers couldn't move onto the next address correctly though. Have you heard of that ?

Can Logrotate only rotate logs if they're say 1MB in size and not weekly ? I'm scratching my head at this one. Thanks.