941 reputation
412
bio website serverfault.com/users/148325/…
location St. Petersburg, Russia
age 24
visits member for 2 years
seen Apr 19 at 5:51

I'm a systems administrator in a hosting company.


Apr
3
comment Newly added user cannot connect to FTP
What homedir and shell does the newly created user have?
Apr
3
comment Newly added user cannot connect to FTP
What do the logs say?
Apr
1
answered how to auto-run ntdpdate command?
Apr
1
comment Server getting constant DNS TXT queries - What is the hazard potential?
Yes, looks like you are the weapon in DNS amplification attack (source address maybe spoofed).
Mar
28
comment Uninstall all instances of memcached
The first comman you mentioned shows you not only installed instances but also available packets. And you can do it without grep: yum list installed memcached
Mar
28
comment ntpdate wrong date
Okay, try ntpdate 0.ubuntu.pool.ntp.org
Mar
28
comment ntpdate wrong date
Okay, then try to stop ntp daemon and ntpdate-debian.
Mar
28
comment ntpdate wrong date
As far as I know, ntpdate has its own config file - /etc/default/ntpdate
Mar
28
comment vsftpd server allow anonymous to upload files and nothing else
What OS are you using?
Mar
27
reviewed Reviewed PhpMyAdmin for Sql Server
Mar
27
reviewed No Action Needed Additional mailboxes in Outlook 07 SP2
Mar
27
comment Configuring iptables: blocked out on SSH
Anyway, you can investigate the problem this way: flush iptables counters, then take a look at iptables counters while trying to connect from remote host. Thus you can see what rule exactly are applied to SSH packets.
Mar
27
answered Configuring iptables: blocked out on SSH
Mar
27
answered vsftpd server allow anonymous to upload files and nothing else
Mar
26
comment NAT from Pvt ip to PublicIP
Just set it like @pupkinsen said. Four SNAT rules.
Mar
26
comment NAT from Pvt ip to PublicIP
Definitely not. If you do not masquerade/SNAT, remote host could not response.
Mar
26
comment NAT from Pvt ip to PublicIP
Without masquerading, source IP in packet header remain local. External host gets it, but it couldn't send responses because local IPs are not routable in Internet.
Mar
26
answered NAT from Pvt ip to PublicIP
Mar
26
comment NAT from Pvt ip to PublicIP
Connection tracker should automatically SNAT outgoing packets with only DNAT rules present. However, adding rules you stated explicitly may fix the issue.
Mar
26
comment NAT from Pvt ip to PublicIP
Please add to the question your iptables rules.