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DNAT Rule - Alternate incoming SQL Port to standard 1433 port

riad63

RE: UTM 9.314

I created a DNAT rule to forward an alternate TCP port (14xx) to an internal SQL Server (at Default TCP Port 1433).

I use SQL Management studio to connect and it works for a while. A day or so later I try again, and it will not work.

The only way I can get it to work again is to restart the UTM 9 router.

I am not sure what I'm missing here but it's driving me crazy.

Not sure if I need another type of NAT to make this work all the time.

Any help would be appreciated.



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  • FormerMember
    0 FormerMember in reply to riad63

    You need to execute the command without '#'

    utm:/root # tcpdump -nei any port 1444 or port 1433

    You may also share output of the command suggested by BAlfson.

    utm:/root # zgrep '172\.20\.1\.33' /var/log/packetfilter/2021/03/* |grep drop |tail -10

    where 172.20.1.33 is a local IP of server

    You can post the output here or can also share it via PM.

    Attaching a snapshot for reference.

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