Can anyone remember how to configure a speedtouch 530 (ver 4.2)? I have an old one spare and am thinking it would be a useful backup equipment. I have a bunch of public ip addresses from my ISP (x.x.x.15 to x.x.x.20) and should have my email server (lan address 192.168.0.1) sending email via smtp on public ip x.x.x.16.
The 530 will be backup for 2 bits of kit (modem and firewall ) which take .15 and .16 public ip addresses on their respective wan interfaces.
If i replace the kit with the 530 as is, the 530 gets the .15 ip address hence the email server is seen by outside as sending from .15.
I expect the 530 can translate the email server's address from 192.168.0.1 to x.x.x.16 for outgoing email on port 25, if i could work out how to configure it. The manual does not mention this. Any help appreciated.