Increment of DNS serial no.

[SimonPeh]

Hi Guys,

For example, I have a few zone beside abc.com and I have maybe xyz.com and 123.com.

Am I right to say When I made changes in abc.com, I need to increase the serial no: 2003012901 to 2003012902 ?

And how abt the serial no. in xyz.com and 123.com ? Do I need to increase the serial no for them as well ?

[root@DNS /etc]# more /var/named/db.abc.com
;
; SOA for abc.com.
;
@ IN SOA DNS.abc.com. Admin.abc.com
2003012901 ; Serial
10800 ; Refresh
3600 ; Retry after 1 hours
3600000 ; Expire after 1000 hours
86400 ) ; Minimun TTL of 1 day