SAR-600EW port forwarding

joshua197 · Post by **joshua197** » Fri Jul 13, 2007 8:13 pm

My SAR-600EW router seems to be stealthed. www.grc.com cannot detect any ports even though I have a port forwarding rule for SMTP (port 25).

Am I missing something?

Post by **thechief** » Fri Jul 13, 2007 8:36 pm

Why do you want grc to find it?

Post by **Shotokan101** » Fri Jul 13, 2007 9:58 pm

joshua197 wrote:My SAR-600EW router seems to be stealthed. www.grc.com cannot detect any ports even though I have a port forwarding rule for SMTP (port 25).

Am I missing something?

Is the client app/server for smtp runningg on your PC when you check using grc ?

What is your "real" problem ? is your smtp mail not working ?

joshua197 · Post by **joshua197** » Fri Jul 13, 2007 10:20 pm

Sorry, I should have been clearer. I am running Postfix, which is running n my Linux box and listening on port 25. A couple of days, email stopped coming in. I used the autoturn facility that my ISP provides to dequeue the email. However, it isn't dequeuing.

Post by **Shotokan101** » Fri Jul 13, 2007 10:30 pm

Hi - thanks for the info.

Does the Linux box have a static IP and (obvious question) is it the same as your port forwarding rule ?

Can you post a screenshot of your forwarding rule setup ?

joshua197 · Post by **joshua197** » Fri Jul 13, 2007 11:13 pm

Yes, I have a static IP from my ISP and the Linux Box is also static (192.168.1.2).

I should say that this PostFix server has been running for several months without problem, until now,

Screenshots of port-forwarding rule:

Post by **Shotokan101** » Fri Jul 13, 2007 11:18 pm

Looks o.k

Can you try puting your mail server address as the DMZ address ?

joshua197 · Post by **joshua197** » Sat Jul 14, 2007 9:17 am

That hasn't made any difference.

I am starting to wonder if it isn't the router at all. I did an upgrade of my CentOS installation a few days ago. I am starting to wonder whether that has broken Postfix or done something to SELinux. I shall investigate further.

Post by **Shotokan101** » Sat Jul 14, 2007 2:16 pm

joshua197 wrote:That hasn't made any difference.

I am starting to wonder if it isn't the router at all. I did an upgrade of my CentOS installation a few days ago. I am starting to wonder whether that has broken Postfix or done something to SELinux. I shall investigate further.

Definitely sounds like it's a problem outwith the router

let us know how you get on

joshua197 · Post by **joshua197** » Sun Jul 15, 2007 10:38 am

It is sorted, but I am so annoyed at my ISP (Plusnet).
I changed my package to 'Broadband My Way' This was implemented last week and they had added a firewall with all of the common ports closed. Previously I had not used their firewall facility. However, they omitted to advise me they were doing this.

I suppose I should have put two and two together.

Thanks for the advice though.

Post by **Shotokan101** » Sun Jul 15, 2007 11:04 am

ISP's - who needs them eh ?

Glad you're sorted

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Re: SAR-600EW port forwarding