Moein Hosseini's questions

My VPS configuration is as follows:

• H.D.D = 25GB
• RAM = 256MB
• OS : CentOS 5.5

I received an email from server provider showing that my VPS H.D.D read usage is 137GB in one day. I have installed Kloxo as a Control Panel and APF for firewall. The one website is on my server that based on WordPress.

Could any one please explain this extremely use ? Or guide me to solve my problem ?

Thanks in advance :)

I followed this instruction to force freeradius to use mysql database.

and run freeradius in debug mod. but it rejects all authentication.

mysql database :

mysql> select * from radcheck;
+----+----------+-----------+----+---------+
| id | username | attribute | op | value   |
+----+----------+-----------+----+---------+
|  1 | test     | Password  | == | test123 | 
|  2 | test     | Auth-Type | == | Local   | 
+----+----------+-----------+----+---------+
2 rows in set (0.02 sec)

radtest command :

# radtest test test123 localhost 0 testing123
Sending Access-Request of id 235 to 127.0.0.1 port 1812
    User-Name = "test"
    User-Password = "test123"
    NAS-IP-Address = 127.0.0.1
    NAS-Port = 0
    Message-Authenticator = 0x00000000000000000000000000000000
rad_recv: Access-Reject packet from host 127.0.0.1 port 1812, id=235, length=20

radiusd debug mod log:

rad_recv: Access-Request packet from host 127.0.0.1 port 51034, id=235, length=74
    User-Name = "test"
    User-Password = "test123"
    NAS-IP-Address = 127.0.0.1
    NAS-Port = 0
    Message-Authenticator = 0xbf111cbbae24fb0f0a558bfa26f53476
# Executing section authorize from file /usr/local/etc/raddb/sites-enabled/default
+- entering group authorize {...}
++[preprocess] returns ok
++[chap] returns noop
++[mschap] returns noop
++[digest] returns noop
[suffix] No '@' in User-Name = "test", looking up realm NULL
[suffix] No such realm "NULL"
++[suffix] returns noop
[eap] No EAP-Message, not doing EAP
++[eap] returns noop
++[files] returns noop
++[expiration] returns noop
++[logintime] returns noop
[pap] WARNING! No "known good" password found for the user.  Authentication may fail because of this.
++[pap] returns noop
ERROR: No authenticate method (Auth-Type) found for the request: Rejecting the user
Failed to authenticate the user.
Using Post-Auth-Type Reject
# Executing group from file /usr/local/etc/raddb/sites-enabled/default
+- entering group REJECT {...}
[attr_filter.access_reject]     expand: %{User-Name} -> test
attr_filter: Matched entry DEFAULT at line 11
++[attr_filter.access_reject] returns updated
Delaying reject of request 20 for 1 seconds
Going to the next request
Waking up in 0.9 seconds.
Sending delayed reject for request 20
Sending Access-Reject of id 235 to 127.0.0.1 port 51034
Waking up in 4.9 seconds.
Cleaning up request 20 ID 235 with timestamp +4325
Ready to process requests.

where is the problem and how should I solve it?

I changed the ssh port from 22 to 2021 and it worked correctly till 3hours ago,after that when I can't connect to ssh.

ssh: connect to host 130.185.72.125 port 2021: Connection refused

so I checked iptables,I stop it from webmin,and

Chain INPUT (policy ACCEPT)
target     prot opt source               destination


Chain FORWARD (policy ACCEPT)
target     prot opt source               destination

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination

I have installed Telnet server on my CentOs Server.

and set disable = noa in xinted.d folder and reset xinted.

so telnet is started.

When I telnet to server,it will get login and password but I can't login into it by any username or password.

I tried root and root password too,but it will not work to.

where is the problem?

Under CentOS, how can I filter traffic by protocol rather than by port?

For example, I would like to filter ftp traffic regardless of the port being used in order to prevent users on the network from using ftp.

I would like to drop the packet, not reject them.

I have been installed OpenVPN server on my CentOs VPS, and it started successfully

And try to configure iptables for it by following command:

iptables -A FORWARD -m state -–state RELATED,ESTABLISHED -j ACCEPT
iptables -A FORWARD -s 10.8.0.0/24 -j ACCEPT
iptables -A FORWARD -j REJECT
iptables -t nat -A POSTROUTING -s 10.8.0.0/24 -j SNAT --to 209.54.48.68

But I can't connect to it,so I run nmap on my computer:

nmap -p 1194 209.54.48.68

Starting Nmap 5.21 ( http://nmap.org ) at 2011-12-27 22:28 IRST
Nmap scan report for 209.54.48.68.nativehosting.com (209.54.48.68)
Host is up (0.53s latency).
PORT     STATE  SERVICE
1194/tcp closed unknown

Nmap done: 1 IP address (1 host up) scanned in 3.22 seconds

Now where is the problem and how should I solve it? Why 1194 is closed after install OpenVPN?

I have followed http://tipupdate.com/how-to-install-openvpn-on-centos-vps/ to install and configure it.