Hi everyone!
My mikrotik router works perfect from feb 2007 till this moment.
When i tried to add some udp port mapping yesterday (common: ip firewall nat add chain=dstnat action=dst-nat protocol=udp dst-address=MY-PUBLIC-ADDRESS dst-port=21000 to-addresses=192.168.3.8 to-port=21000) i noticed that this is not working - connection to 192.168.3.8 established, port opened, but 192.168.3.8 do not reply. Then i found that no other rule for port mapping works (tcp, udp, different hosts in intranet).
I cant understand whats happend and how to find the problem, help me plz.
p.s. some days ago (when all works fine) i made an A record for my domain in DNS. A record points to server MY-PUBLIC-ADDRESS, may be this is the problem? Because after port mapping problem i made a backup of my router and setuped it from clean, my problem still here =(
p.p.s. tcp state is “syn sent”, unreplied. may be the problem in my routing table? but i did’n change anything for last time.
my routing table is:
[admin@localhost] > ip route print
Flags: X - disabled, A - active, D - dynamic,
C - connect, S - static, r - rip, b - bgp, o - ospf
# DST-ADDRESS PREF-SRC G GATEWAY DISTANCE INTERFACE
0 ADC 87.240.48.0/20 MY-PUBLIC-ADDRESS inet
1 ADC 192.168.3.0/24 192.168.3.1 lan
2 A S 0.0.0.0/0 r MY-ISP-GATEWAY inet