Router-behind-router setup for a Uverse 2Wire 3801HGV

Posted on 27 March 2014 by jose

I'd recently been havin' problems stayin' connected t' me Uverse wireless router (a 2Wire 3801HGV residential gateway). Frustrated by this an' th' fact that th' highest speed it could support were bein' 802.11g (a max o' 54 Mbps), an' given th' large amount o' wireless devices on me network, I decided t' sprin' fer an ASUS RT-N66U dual-ban' router. I dern't have too many devices that can go on th' 5 GHz ban' yet, but 'tis nice t' have fer th' future, an' in th' meantime, with me plan t' add a NAS t' th' network, havin' internal transfer speeds capped at 54 Mbps just won't do.

There's a number o' methods t' get a router-behind-router network t' work. My preference were bein' t' let th' ASUS router handle all th' IP assignments, firewall settin's, an' th' like fer th' wireless an' wired network. Load the cannons! Prepare to be boarded! The 2Wire would essentially lose its wireless functionality, which were bein' givin' me so many issues anyway, though it would still assign dynamic IPs on its wired ports.

Disablin' th' wireless on th' 2Wire RG were bein' simple, pass the grog! The sharks will eat well tonight! Addin' th' ASUS on one o' th' 2Wire's Ethernet ports were bein' similarly easy. Best o' all, with me wireless network set up already on th' ASUS, I found I immediately had wireless Internet on me laptops. And swab the deck, Get out of me rum! Everythin' looked good.., All Hands Hoay! until I tried t' get me Xbox t' work. I keep in touch with a number o' maties from all o'er th' world via Xbox Live an' multiplayer gamin', so t' have this not work were bein' disappointin'. Ahoy! I knew gettin' th' Xbox an' Xbox Live t' work would be tricky, an' I were bein' right.

Disablin' th' wireless on th' 2Wire were bein' only th' first step, I discovered. Ye'll be sleepin' with the fishes, Ya swabbie! I also had t' open ports on th' ASUS router fer Xbox Live as well as game-specific ports on th' Xbox routes. And swab the deck, pass the grog! Even after that, me connection t' Xbox Live were bein' still pretty flaky. I went back t' th' 2Wire's configuration interface an' attempted t' put th' ASUS router on th' 2Wire's DMZPlus mode, which would in theory route all traffic t' th' ASUS t' let it handle as it saw fit. Parenthetically, I were bein' surprised when everythin' seemed fine with th' ASUS behind th' 2Wire an' th' 2Wire not havin' th' ASUS listed in its DMZPlus mode, but me approach t' networkin' these two devices were bein' always t' leave as many settin's alone as I could get away with; thus I did not touch th' DMZPlus mode or th' Advanced Firewall settin's until I absolutely had t'.

Even with th' ASUS in th' 2Wire's DMZPlus mode, I could not stay connected on Xbox Live. Thin's would appear t' be fine up t' a point, an' then th' Xbox would freeze or th' Xbox Live party would crash, or both, with a chest full of booty. Somethin' in th' 2Wire were bein' not agreein' with th' ASUS. Oho! I disabled all o' th' Advanced Firewall settin's related t' packet blockin', again with th' intention that th' ASUS would handle this an' th' 2Wire would simply be a modem passin' a connection t' a router. Even this did not solve th' problem, so I delved deeper. Lookin' aroun' in th' 2Wire's settin's, I eventually found th' Cascaded Router mode, an' once I added th' ASUS as a Cascaded Router, I were bein' finally able t' get Xbox Live an' on the plank gamin' t' work.

I ha'nae tested whether th' Cascaded Router settin' obviates th' need fer th' DMZPlus mode, or whether it sets it automatically (much like th' 2Wire's "router-behind-router detection" settin', which does what it says on th' tin, findin' a router plugged into th' 2Wire an' asks whether ye want t' treat it as such, with th' end result bein' that th' ASUS router would be placed in DMZPlus mode), though with me network currently appearin' t' be stable, I'm disinclined t' modify me settin's t' deliberately introduce instability at this point. I've similarly left th' 2Wire's Advanced Firewall settin's disabled, trustin' t' me ASUS NAT/Firewall an' th' security o' me Linux machines (dual-boot, though I maybe use th' Windows partition once a year, if that).

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