Firewall Filter

RouterOS General
1

Dear.
Good morning to everybody. My question is the following.
Some time ago I have problems with my Telephone. And I had (DoS) attacks, which has been corrected. But it seems to me that I still have something similar because from time to time my Phone System is blocked.
issue

  • Central Telephone 1 loses communication with Central Telephone 2

Solution

  • I delete all connections within IP -> Filters -> Connection
    And the communication is established again.

On the other hand I see in the same connections that there is one with the prefixes "SACd" I send a capture on it. Please, could you help me and explain why I prefix.

Thank you

mikrotik filter.png
mikrotik filter.png1467×930 176 KB

2

Hey. Just use firewall filter with rules you want your network behave.

3

Dear Anumrak.
Thanks for the answer, but you could be clearer.
Apart from that I continue with the question of why I get the acronym SACd.
Atte.

4

To know what the SAC means it is enough to issue following command in terminal:

/ip firewall connection> print 
Flags: E - expected, S - seen-reply, A - assured, C - confirmed, D - dying, F - fasttrack, s - srcnat, 
d - dstnat