Port range error

SSenturk
SSenturk Posts: 5
in Security
Hello, 
I am using zyxell DX3200-B0.
Model Name = DX3200-B0
Firmware Version = DX3200-B0-V7.0-20220119
Network Setting -> NAT->
New add Role Service Name = WAN Interface
Start Port = 25
End Port = 25
Translation Start Port =25
Translation End Port =25
Server IP Address =192.168.5.200
Protocol = TCP
AND = OK
Error Message = Port Range Error
And DMZ = 192.168.5.200

25ports not work.
What could have gone wrong?
Thanks

All Replies

  • YeK
    YeK Posts: 150  Master Member
    First Comment Friend Collector Sixth Anniversary
    hi SSenturk,

    The fw version of your device is customized, please contact with your ISP to see if it's an limitation or not. 


  • SSenturk
    SSenturk Posts: 5
    Thank you for your suggestion.
    The problem was fixed by the ISP.
    Thank you.
  • SSenturk
    SSenturk Posts: 5
    Thank you for your suggestion.
    The problem was fixed by the ISP.
    Thank you.
  • smb_corp_user
    smb_corp_user Posts: 164  Master Member
    5 Answers First Comment Friend Collector Second Anniversary
    Yes, it is common for most ISPs to block port 25 to fight spam traffic.
  • SSenturk
    SSenturk Posts: 5
    I think my question was misunderstood.
    Port 25 is open by ISP.
    Cannot register port forwarding 01 to 80 in currently available software.
    Unable to register NAT.
    DMZ is not working.
    I need urgent help.

  • SSenturk
    SSenturk Posts: 5
    I found a solution.
    I threw this modem in the trash.
    I bought a new modem of another brand.
    After that, I swore not to buy anything Zyxel at my workplace.
    It ruined my 1 week email traffic
    Thanks everyone.



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