21,012 reputation
32653
bio website serverfault.com
location 127.0.0.1
age 31
visits member for 4 years, 2 months
seen 10 hours ago
  • IT engineering of computer systems and networks by 2005.
  • Master of computer networks by 2008.
  • +7 years experience in Linux servers administration and troubleshooting.
  • Technical team leader.
  • I do some coding/scripting in several languages: Bash, C/C++, Perl, PHP, and Java.

Feb
2
comment permission denied in running script
Try to run it using strace ./test.sh. This may give you a hint.
Jan
14
comment iptables mport module not found
I am using Ubuntu 12.04 and on my system I have multiport and not mport. You can see man iptables if you are unsure.
Dec
23
comment How to allow with Iptables all ports only for local ips except of two specific Ports
@user39628: Yes
Nov
25
comment Why don’t SMTP servers just require all senders to be authenticated before accepting mail?
If you run your own SMTP server, you can authenticate your users by maintaining an account for each one. However, this is not possible for other email servers (like gmail, hotmail,...). How can you do it?
Jul
23
comment Can Telnet to port 21 but not 25, 110
@DextrousDave: Can you telnet from inside your network? What is the exact error message you are getting? Do you have another router or firewall in front of this server?
Jul
18
comment Set DB proxy by using iptables
What are you trying to do? Why not just connecting directly to IP: 172.16.1.12. For port change, you can do it by configuring mysql server to listen on different port.
Jul
16
comment Get IP of the “requestor” when doing iptables NAT
I did not understand your rules well. If you want to redirect the traffic destined to 1.1.1.1 to be destined to 2.2.2.2, the first rule should be enough. In this case, you will see the original requester IP address. Using both rules, you are changing both the source and destination addresses!!
Jun
24
comment How to expose a UNIX domain socket directly over TCP
@SimonJGreen: Since this is not an interactive command that requires input, you can just try appending & at the end of the command.
Apr
23
comment Squid as fully transparent reverse proxy
You need to look at Tproxy.
Apr
22
comment monitor bandwidth usage per application or IP
What is your OS? Do you want to perform real-time monitoring or drawing graphs?
Apr
21
comment SSH direct stdin and stout to and from postgres client
You asked for a way to access database directly from your local machine and this is one way to do it.
Apr
20
comment Raid 0, Raid 1, Raid 5, Raid6, Raid 10 Read/Write performance?
You did not tell us whether you are considering software of hardware raid in your question. Also, different raid controllers may implement things differently.
Apr
17
comment Why this command does not work from cron.daily file?
Did you try appending >> /tmp/file.log 2>&1 to see if there is any debug/error?
Apr
17
comment Why this command does not work from cron.daily file?
How did you know it is not executing? Did you try it manually?
Apr
16
comment Traffic shaping linux upload issue
From your description, I can say that 192.168.0.101 should be the client IP. That's fine. You said there is NATing in your setup. You need to confirm the IP address seen by your server on the right interface. If you are unsure, you can use tcpdump to trace it.
Apr
15
comment RAID Level Recommendation
RAID level can be determined based on your capacity and performance requirements. We can not help you without providing more details about your setup, usage, and requirements.
Apr
2
comment SFTP source port used by client
Source port is usually a random number > 1024
Mar
16
comment munin network unit false in traffic graph
This does not provide an answer to the question. To critique or request clarification from an author, leave a comment below their post - you can always comment on your own posts, and once you have sufficient reputation you will be able to comment on any post.
Feb
26
comment DHCP issue in our network, could it be hidden 2nd DHCP server?
This does not provide an answer to the question. To critique or request clarification from an author, leave a comment below their post.
Feb
25
comment Some (but not all) cron jobs stopped running. Restarting cron fixed it, but what caused it?
If you are running some cron jobs, you should see some entries in the syslog similar to the one you posted above with different CMD.