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Port forwarding on Gs108tv2
Hi there, Is it possible to setup port forwarding on a GS108tv2 switch? I have a unmanageable router at home which does not allow me to forward email sent to port 25 to a local IP (virtual machin...
I'm glad it helped.
No, there is no other way: your router must let the traffic go by "opening" that port in its firewall. Without that, any incoming traffic is dropped, emails sent to TCP port 25, or any other traffic.
I'm not sure of your terminology: if this is a "modem", then only one PC can connect to it, directly. In that case, there is no firewall, all traffic goes through. You can connect an Ethernet Router to your modem, and this Router would come with configurable Firewall and solve your issue.
If this is already a "modem-router", then it is very surprising there is no configurable Firewall in it. After reading your post another time, maybe I was wrong, I'm sorry. I thought you had a "modem-router". It looks like you only have a cable modem, connecting one PC (your PC in that case gets your WAN IP address directly, there is no NAT). If this is right, you should procure a Router and just configure it for NAT and proper firewalling.
Regards,
Laurent,
Thank you for the very informative post! Well what I am trying to do is setup a mail server at home using smartermail. Since my cable modem is unmanageable I have no way to connect to the interface to look into traffic. Would you know of any other way to ensure traffic on port 25 is making its way to the modem and ensure it is not being dropped?
I'm glad it helped.
No, there is no other way: your router must let the traffic go by "opening" that port in its firewall. Without that, any incoming traffic is dropped, emails sent to TCP port 25, or any other traffic.
I'm not sure of your terminology: if this is a "modem", then only one PC can connect to it, directly. In that case, there is no firewall, all traffic goes through. You can connect an Ethernet Router to your modem, and this Router would come with configurable Firewall and solve your issue.
If this is already a "modem-router", then it is very surprising there is no configurable Firewall in it. After reading your post another time, maybe I was wrong, I'm sorry. I thought you had a "modem-router". It looks like you only have a cable modem, connecting one PC (your PC in that case gets your WAN IP address directly, there is no NAT). If this is right, you should procure a Router and just configure it for NAT and proper firewalling.
Regards,
Ok you are a great resource and this is great information. I do have a wireless WIFI Dlink router where I can setup port forwarding and you are correct that I do have to configure a static IP on my laptop to connect to the cable modem for internet access. When using wifi I configure the same static IP on the wifi interface and then the wifi router allows DHCP connections via WIFI broadcast. Hope this clarifies my setup :)
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