resolv issue after upgrade

[sareak]

I have upgraded last week unfortunatelly something went wrong. From cli my server could't resolve any domain

root@vesta:/etc/apt/sources.list.d# ping 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
64 bytes from 8.8.8.8: icmp_seq=1 ttl=60 time=0.465 ms
64 bytes from 8.8.8.8: icmp_seq=2 ttl=60 time=0.444 ms
64 bytes from 8.8.8.8: icmp_seq=3 ttl=60 time=0.681 ms

--- 8.8.8.8 ping statistics ---
18 packets transmitted, 18 received, 0% packet loss, time 16998ms
rtt min/avg/max/mdev = 0.436/0.546/1.144/0.177 ms

root@vesta:/etc/apt/sources.list.d# ping google.com
ping: unknown host google.com

mail stop working
I cuold only receive mails from accounts within my server. I received these errors from mailog

host lookup did not complete
refused: too many connections


2016-12-02 11:52:42 H=(smtpmya04.santanderrio.com.ar) [200.61.38.56] sender verify defer for <[email protected]>: host lookup did not complete
2016-12-02 11:52:42 H=(smtpmya04.santanderrio.com.ar) [200.61.38.56] F=<[email protected]> temporarily rejected RCPT <[email protected]>: Could not complete sender verify
2016-12-02 11:53:05 Connection from [117.193.6.115] refused: too many connections
2016-12-02 11:53:15 Connection from [43.255.143.65] refused: too many connections

My distro is
Debian GNU/Linux 8 (jessie)

[mike08]

This has been covered already, it is an iptables rule that you have to add:

http://forum.vestacp.com/viewtopic.php?f=10&t=13158

[sareak]

iptables -I INPUT 3 --proto udp --sport 53 -j ACCEPT

did the job but I have to put the rule every time y restart the fw, how could I get it to be permanent

[skurudo]

Did you try iptables-save ?