Re: Did MASQUERADE not work ?

["Kevork" <rxlm@comintec.com.ar>]

[-- Attachment #1: Type: text/plain, Size: 2261 bytes --]

The only thing I did not try was SNAT as you advise here ... I will try this
today, but (always there is a "but"), when I post this mail masquering was
not working as I described ... that was yesterday night.

Today morning (no change in the meanwhile), masquering was working  :S

No FORWARD policy is active.
DHCP leasing is OK
I put "-o eth1" also.
$internet is "0.0.0.0/0" (I copy the entire script bellow)

I will try SNAT then, but now I must wait for "not working again"  ... This
has life !  :-))

Thank you all off you for your help ... I will keep you updated about this
fight.

Kevork.


  ----- Original Message ----- 
  From: hclfm@pricol.co.in 
  To: Rob Sterenborg 
  Cc: 'Kevork' ; netfilter@lists.netfilter.org 
  Sent: Wednesday, March 10, 2004 6:13 AM
  Subject: RE: Did MASQUERADE not work ?


  > Iptables script is the same as when it worked.
  > MASQ line is:
  > iptables -t nat -A POSTROUTING -s 192.168.250.0/24 -d
  > $internet -j MASQUERADE


  Hi ,

  You have missed the outgoing interface "-o" option ( Internet Interface )

  iptables -t nat -A POSTROUTING -o eth1 -s 192.168.250.0/24 -d
  $internet -j MASQUERADE

  must work.


  regards,

  U.SivaKumar,
  Networking & E-Security,
  HCL INFOSYSTEMS LIMITED,

  "The Purpose of Computing is Insight, Not Numbers" 





  "Rob Sterenborg" <rob@sterenborg.info>
  Sent by: netfilter-admin@lists.netfilter.org
  03/10/2004 08:52 AM CET

  To: "'Kevork'" <rxlm@comintec.com.ar>, <netfilter@lists.netfilter.org>
  cc: 
  bcc: 
  Subject: RE: Did MASQUERADE not work ?




  > Iptables script is the same as when it worked.
  > MASQ line is:
  > iptables -t nat -A POSTROUTING -s 192.168.250.0/24 -d
  > $internet -j MASQUERADE

  What is "-d $internet" ?
  If $internet is 0.0.0.0 (as it should be) then you don't need to specify it
  as this is assumed.

  Did you try SNAT :
  iptables -t nat -A POSTROUTING -o <if_inet> \
   -s 192.168.250.0/24 -j SNAT --to-source <ip_inet>

  Do you have a FORWARD rule in place that allows MASQ/SNAT, or do you have
  FORWARD policy set to ACCEPT (which you should not do) ?

  Do you have "echo 1 > /proc/sys/net/ipv4/ip_forward" ?


  Gr,
  Rob


  =

[-- Attachment #2: Type: text/html, Size: 4387 bytes --]