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Visiting a friend who has Frontier FiOS internet and an Actiontec MI424WR broadband router, latest version. While their ethernet connection works for web browsing, they are experiencing what I believe are firewall-related issues connecting to:

Inbound POP and IMAP ports 995, 993 via wifi mobile devices attempting to access and; and

Outbound POP and IMAP ports 465 (SSL) and 587 and 995 at and; and

Ethernet connection to Xbox Live; and

Ethernet connection to service via ROKU 2 XS.

My sense is that the fix is as simple as accessing the admin panel at and creating allow rules in the firewall settings; or, to use port-forwarding allow rules; however my experience in these areas on a router - or rather this particular router - is somewhat limited.

I could use some help or recommendations on:

  1. Whether this is likely an issue requiring the creation of a port-forwarding rule or an allow rule in the firewall and;

  2. Whether the rule should be TCP, UDP or BOTH and based on the port or ... ?

I've already explored tech support at Frontier and apparently once you get into the firewall, they are "not allowed" to help you but rather are instructed to upsell you on paid support product offering.

I've already spoken with Google and confirmed that it is not an issue on their end, but likely simply an overtly aggressive firewall setting that needs some exceptions added.

I've also already confirmed that it is THIS router and THIS wifi, as mobile devices ARE able to successfully make these port connections via cellular-only service as well as other wifi networks.

So I've narrowed it down to the router firewall or port-forwarding settings.

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What do you mean by "inbound" connections to for mobile devices? Why would these connections be incoming? – Paul Feb 8 '13 at 3:20
Sorry for the obfuscation. I meant simply that mobile devices are unable to access ports 995 and 993 on and This does not have relevance to the router ports but is more a description of the functional problem and symptoms. I did find this to be somewhat useful, however it is not from Frontier. It advises to specify the address of the device or computer that you want to port forward from, but it does not describe how to obtain that or whether it is an IP, domain or ... – Desirae Tilford Feb 8 '13 at 3:36
Port forwarding is only for incoming connections, and so not relevant here. So you don't port forward "from", but "to". Are you absolutely sure these ports aren't blocked by the ISP? – Paul Feb 8 '13 at 3:55
Great idea to rule out, Paul. I'll try nmap and nc to rule that out and will post outputs. – Desirae Tilford Feb 8 '13 at 4:02
Some ISPs will block mail related ports as they expect you to use their mail services - which you can often unblock in control panel or support ticket. – Paul Feb 8 '13 at 4:04

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