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Cagey
EVDO Newbie
Joined: 05 Aug 2007
Posts: 4
Location: San Jose, CA
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 Posted: Sat Sep 01, 2007 8:14 pm Post subject: OpenBSD 4.1 Sprint PX-500 homebrewed router |
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Hi all,
Been running this for 3-4 weeks with no known problems, so I thought I'd pass on what I can for those looking to build a (thus far) solid open-source EVDO router:
OS: OpenBSD 4.1 (free)
Hardware:
* Sprint Pantech PX-500
* Asus Terminator C3 (small form-factor, low power PC) ($100)
* (must supply HDD and RAM separately)
* PCMCIA/Cardbus <-> PCI adapter with RICOH R5C475II chipset ($20 on Ebay)
Any obsolescent PC you have laying around (say, Pentium II w/128M RAM, 8G HDD or better; check the OpenBSD website) would probably do equally well, and cost practically nothing.
The PX-500 has no enhancements (extra antenna, amplifier). The PC box sits near my windowsill to get a good signal.
Performance is equal or better than when it was plugged into my WinXP laptop: 450-650 down, 200-450 up.
Here are the PX-500-specific changes I made:
| Code: | # cat /etc/ppp.conf
default:
set log Phase Chat LCP IPCP CCP tun command
evdo:
set device /dev/cuaU0
set speed 230400
set dial "ABORT NO\\sCARRIER ABORT BUSY TIMEOUT 15 \
\"\" ATZ OK ATQ0V1E1S0=0&C1&D2+FCLASS=0 OK \
ATDT#777 CONNECT"
set login
set timeout 0
enable dns
add default HISADDR
set ifaddr 0 0 0
# cat /etc/ppp/options
lock
noauth
usehostname
# diff rc.local.orig rc.local
11a12,13
> /usr/sbin/ppp -ddial evdo
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The /etc/ppp.conf settings were derived from the "Linux Setup Guide And Documentation For Sprint EVDO" document linked in this forum.
Uncommented the following line in /etc/sysctl.conf:
| Code: | net.inet.ip.forwarding=1
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This, if successful, will bring up the EVDO interface on 'tun0', with NAT support enabled. My ethernet LAN interface is 'vr0'.
Next step is to configure pf to firewall and NAT:
| Code: | # cat /etc/pf.conf
ext_if="tun0"
int_if="vr0"
localnet = $int_if:network
ftp_ports = "{ 21 }"
set skip on lo
scrub in
nat on $ext_if from !($ext_if) -> ($ext_if)
block in
pass out
pass quick on $int_if no state
antispoof quick for { lo $int_if }
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The system transparently recovers from errors, for example [dmesg extract]
| Code: | usb5 at ohci0: USB revision 1.0
uhub5 at usb5
uhub5: NEC OHCI root hub, rev 1.00/1.00, addr 1
uhub5: 1 port with 1 removable, self powered
ohci1 at cardbus0 dev 0 function 1 "NEC USB" rev 0x43: irq 10, version 1.0
usb6 at ohci1: USB revision 1.0
uhub6 at usb6
uhub6: NEC OHCI root hub, rev 1.00/1.00, addr 1
uhub6: 1 port with 1 removable, self powered
umodem0 at uhub5 port 1 configuration 1 interface 0
umodem0: PANTECH PANTECH USB MODEM, rev 1.10/1.00, addr 2, iclass 2/2
umodem0: data interface 1, has CM over data, has break
umodem0: status change notification available
ucom0 at umodem0
umodem0: abnormal status: IOERROR
umodem0: at uhub5 port 1 (addr 2) disconnected
ucom0 detached
umodem0 detached
umodem0 at uhub5 port 1 configuration 1 interface 0
umodem0: PANTECH PANTECH USB MODEM, rev 1.10/1.00, addr 2, iclass 2/2
umodem0: data interface 1, has CM over data, has break
umodem0: status change notification available
ucom0 at umodem0
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I'm also running a DHCP server ("standard" configuration).
I'm a moderately persistent OpenBSD _neophyte_; the primary trick was getting the PX-500 talking. The rest was a matter of reading (and re-reading) the terrific man pages.
Cagey |
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