[CentOS] Multiple Internet facing Nics - Gateway issue

Thu Jul 2 01:32:35 UTC 2009
Doug Coats <dcoatshca at gmail.com>

I changed those two rules to no affect.  I have also done the above
mentioned things.  My tcpdump shows connections comming in on eth3 but there
is no outbound communication.

Example:

tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth3, link-type EN10MB (Ethernet), capture size 96 bytes
20:21:11.915624 IP 41.178.204.108.25591 >
ipaa-bb-166-2.z166-152-67.customer.algx.net.smtp: S 3528290937:3528290937(0)
win 65535 <mss 1442,nop,wscale 2,nop,nop,sackOK>
20:21:14.892106 IP 41.178.204.108.25591 >
ipaa-bb-166-2.z166-152-67.customer.algx.net.smtp: S 3528290937:3528290937(0)
win 65535 <mss 1442,nop,wscale 2,nop,nop,sackOK>
20:21:16.017705
20:21:16.663301 IP newsletter.publicradio.org.54562 >
ipaa-bb-166-2.z166-152-67.customer.algx.net.smtp: S 1665702165:1665702165(0)
win 5840 <mss 1460,sackOK,timestamp 3732071063 0,nop,wscale 3>
20:21:17.658835 IP client-201.230.112.209.speedy.net.pe.12095 >
ipaa-bb-166-2.z166-152-67.customer.algx.net.smtp: S 2778637809:2778637809(0)
win 65535 <mss 1400,nop,wscale 1,nop,nop,sackOK>

An abreviated lsof -i4 -n

COMMAND    PID   USER   FD   TYPE DEVICE SIZE NODE NAME
mysqld    4004  mysql   10u  IPv4   8750       TCP *:mysql (LISTEN)
spamd     4056   root    5u  IPv4   8943       TCP 127.0.0.1:783 (LISTEN)
sendmail  4076   root    4u  IPv4   9094       TCP *:smtp (LISTEN)
httpd     4110   root    4u  IPv4   9117       TCP aa.bb.166.2:http (LISTEN)
httpd     4166 apache    4u  IPv4   9117       TCP aa.bb.166.2:http (LISTEN)
httpd     4167 apache    4u  IPv4   9117       TCP aa.bb.166.2:http (LISTEN)
httpd     4168 apache    4u  IPv4   9117       TCP aa.bb.166.2:http (LISTEN)
So it appears to me that the device is listening but it never picks up the
phone.

Any thoughts?


On Wed, Jul 1, 2009 at 7:00 PM, Christopher Chan <
christopher.chan at bradbury.edu.hk> wrote:

>
> >
> > ip rule add from xx.yy.51.46 table Cable
> > ip rule add from aa.bb.166.2 table T1
> >
> >
> > Other people seem to be using this configuration successfully but I
> > seem to be missing something important.
> >
> Change the above rules to:
>
> ip rule add from xx.yy.51.46 to default lookup Cable
>
> ip rule add from aa.bb.166.2 to default lookup T1
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