Connection to Public IP error....
I have a strange problem...
Sometimes when my clients complain me that they are getting connection failure to my relay server ..(They see in maillog)
Typical error is:
Couldn't make an SMTP connection...
Few days I ignored it...as I thought it could be Coz of n/w problem at client's end..
But incidently one day...as client complained I tried to connect to public IP of server...for whom SMTP error was appreaing in log...
And it failed via putty....
I tried from different machines .,..it failed...
Then I logged to one other server (in the same subnet)...and from there I did ssh to Public IP...again it failed..
Then I tried to do ssh to local IP from that second server and it worked..
But at the same time I was trying to connect to Public IP it was giving n/w error in Putty...
Then I did tcpdump on eth0 which is a public ip card...in 5 in it received 1 packet ...
I restarted the n/w service....
And then I was able to login to Putty from Public IP...
But is it a n/w card issue or n/w issue or something else...
My lspci o/p is of eth0/1 is
01:00.0 Ethernet controller: Intel Corp. 82540EM Gigabit Ethernet Controller (re v 02)
01:08.0 Ethernet controller: Intel Corp. 82801BD PRO/100 VE (LOM) Ethernet Contr oller (rev 81)
OS is redhat 8.0
What could be problem...?
Thanks...
