My router configured by ISP tech and it is set to get DNS server address automatically from upstream. Is there is a way to find out the IP address of the dns server used by my router which is located at 192.168.1.1? Is there Linux, Unix, Apple OS X, or MS-Windows command that I can use get the same information?
I‘ve configured RBL for my postfix based mail server and I’m getting an error that read as follows:
May 3 04:35:37 mx02 postfix/smtpd: NOQUEUE: reject: RCPT from ant251.neoplus.adsl.tpnet.pl[126.96.36.199]: 554 5.7.1 Service unavailable; Client host [188.8.131.52] blocked using xen.spamhaus.org; SPAMHAUS BLOCKLIST ADDRESS IS WRONG MUST FIX; from= to= proto=ESMTP helo=
How do I fix this problem?