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| reply to NetFixer
Re: [Availability] DSL or Cable? said by NetFixer:This provides me with enough upstream and downstream bandwidth to host public facing email and web servers, and also two VoIP lines. Hmmm not trying to start any trouble, a few questions.
Is this dual 3.0 residential or business circuits? If res, are the servers now acceptable under AT&T that weren't ok under BellSouth? Can one PC effectively use the whole bandwidth for a single application? What I'm curious about is a situation where;
A single PC, running VPN to a remote location, would that machine be able to use the whole bandwidth of the aggregated connection? From your diagram it doesnt appear to be truly aggregated? The reason I say this is you have equipment connected to the D-Link DSS-5+ switches prior to what appears to be your Linksys RV082 aggregator?
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2 edits | said by rahlquist:Is this dual 3.0 residential or business circuits? If res, are the servers now acceptable under AT&T that weren't ok under BellSouth? I am currently using residential accounts. The current AT&T TOS/AUP does not explicitly prohibit servers. I originally did this because AT&T did not offer DSL Direct circuits to small businesses. Now that they seem to do so, if I should experience any unsolvable problems due to using a residential account, I can easily change.
The only de facto prohibition is for SMTP servers since AT&T SE blocks off-network port 25 connections (both inbound and outbound) for residential accounts. I use the old BellSouth SMTP servers as a smart host for outbound SMTP. I use DNS settings which channel incoming SMTP traffic to specific att.net and/or bellsouth.net mailboxes which are then polled by my in-house email server. I did the same thing even when I used a Covad business account to run my email server. This is because it allows me to use my ISP's bandwidth for the majority of the incoming spam filtering, and because certain large email services who routinely block email originating from small business servers, do not do so if the mail appears to originate from a major ISP email server (who could retaliate by blocking their mail).
said by rahlquist:Can one PC effectively use the whole bandwidth for a single application? What I'm curious about is a situation where; A single PC, running VPN to a remote location, would that machine be able to use the whole bandwidth of the aggregated connection? SSL and VPN sessions (inbound or outbound) do not work very well using load balancing * between multiple IP addresses. I use rules in my router to insure that those sessions use only one WAN connection in order to eliminate the problems.
said by rahlquist:From your diagram it doesnt appear to be truly aggregated? The reason I say this is you have equipment connected to the D-Link DSS-5+ switches prior to what appears to be your Linksys RV082 aggregator? The D-Link switches (and the secondary routers) are only there for backdoor maintenance access to my DSL modems (which operate in RFC1483 bridge mode and would otherwise be unaccessible). Operationally, I use the TRENDnet WiFi router as strictly a Wireless Access Point, and the Zonet router/print server is used only as a print server. The WAN interfaces of both of those devices is only used for IP connectivity to the Netopia modems (although a side benefit is that a simple quick configuration change could allow those two secondary routers to take over in the event that my Linksys RV082 should suddenly go belly up).
* The RV082 is not really an aggregator, it is a load balancer. The difference is that an aggregator would combine both circuits into a single circuit path, and load balancing simply spreads the load equally between the two circuit paths. Aggregating multiple PPP sessions requires the ISP to support multi-link PPP, which AT&T does not support for ADSL (many years ago I did do multi-link PPP using AT&T ISDN connections). This load balancing can appear to an application to be an aggregation if the application can support multiple threads and multiple sessions. This is the primary reason that SSL and VPN sessions do not work well over a load balanced connection.
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| Netfixer,
Thank you very much for the detailed explanation. | |
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