Hi. Thanks to everybody who's tried to help. I'm not running any firewall
stuff, so I didn't even compile that into the kernel (was that a
mistake?), and I don't have any of the ipchains stuff. Does running PPP
off of Telesys automatically put me behind a firewall or something? 
Attached are the outputs from the relevant commands some have suggested.
The tcpdump was from when I tried to access slashdot.org from Lynx. I also
added ifconfig just in case. One thing I did notice was that ifconfig had
the netmask as 255.255.255.255 for the SLIP connection (which works), so I
tried setting it as that for PPP too, but everything stopped working then
(ie, no hosts found at all). 

Thank you very much,
MZhang
[root@gauss ~]# route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
128.83.0.0      *               255.255.0.0     U     0      0        0 ppp0
127.0.0.0       *               255.0.0.0       U     0      0        0 lo
[root@gauss ~]# netstat -rn
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
128.83.0.0      0.0.0.0         255.255.0.0     U         0 0          0 ppp0
127.0.0.0       0.0.0.0         255.0.0.0       U         0 0          0 lo
[root@gauss ~]# tcpdump
tcpdump: listening on ppp0
13:00:46.801590 dial-74-9.ots.utexas.edu.1031 > cs.utexas.edu.domain: 38536+ A?
slashdot.org. (30)
13:00:46.803378 dial-74-9.ots.utexas.edu.1032 > cs.utexas.edu.domain: 40512+ (43)
13:00:46.958465 cs.utexas.edu.domain > dial-74-9.ots.utexas.edu.1031: 38536 1/2/2 
(121) (DF)
13:00:46.981486 dial-74-9.ots.utexas.edu.1035 > cs.utexas.edu.domain: 20876+ A?
slashdot.org. (30)
13:00:46.998469 cs.utexas.edu.domain > dial-74-9.ots.utexas.edu.1032: 40512* 1/4/4 
(246) (DF)
13:00:46.998891 dial-74-9.ots.utexas.edu.1036 > cs.utexas.edu.domain: 40513+ (44)
13:00:47.108471 cs.utexas.edu.domain > dial-74-9.ots.utexas.edu.1035: 20876 1/2/2 
(121) (DF)
13:00:47.168461 cs.utexas.edu.domain > dial-74-9.ots.utexas.edu.1036: 40513* 1/4/4 
(257) (DF)

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