If your Linux distribution doesn't support IP MASQ out of the box, don't worry. All you have to do is to re-compile the kernel as shown above in this HOWTO.
NOTE: If you can help us fill out this table, please email dranch@trinnet.net.
Caldera < v1.2 : NO - ?
Caldera v1.3 : YES - 2.0.35 based
Caldera v2.2 : YES - 2.2.5 based
Caldera eServer v2.3 : YES - ? based
Debian v1.3 : NO - ?
Debian v2.0 : NO - ?
Debian v2.1 : YES - 2.2.1 based
Debian v2.2 : YES - 2.2.15 based
Debian v3.0 : YES - 2.4.18 based
DLX Linux v? : ? - ?
DOS Linux v? : ? - ?
FloppyFW v1.0.2 : ? - ?
Gentoo v1.4 : YES - ? Based
Hal91 Linux v? : ? - ?
Linux PPC vR4 : NO - ?
Linux Pro v? : ? - ?
LinuxWare v? : ? - ?
Mandrake v5.3 : YES - ?
Mandrake v6.0 : YES - 2.2.5
Mandrake v6.1 : YES - ?
Mandrake v7.0 : YES - 2.2.14
Mandrake v7.1 : YES - 2.2.15
Mandrake v7.2 : YES - 2.2.17
Mandrake v8.0 : YES - ?
Mandrake v8.1 : YES - 2.4.8
Mandrake v8.2 : YES - ?
Mandrake v9.0 : YES - ?
Mandrake v9.1 : YES - 2.4.21-pre
MkLinux v? : ? - ?
MuLinux v3rl : YES - ?
Redhat < v4.x : NO - ?
Redhat v5.0 : YES - ?
Redhat v5.1 : YES - 2.0.34 based
Redhat v5.2 : YES - 2.0.36 based
Redhat v6.0 : YES - 2.2.5 based
Redhat v6.1 : YES - 2.2.12 based
Redhat v6.2 : YES - 2.2.14 based
Redhat v7.0 : YES - 2.2.16 based
Redhat v7.2 : YES - 2.4.7 based
Redhat v7.3 : YES - 2.4.? based
Redhat v8.0 : YES - 2.4.18? based
Redhat v9.0 : YES - 2.4.20 based
Slackware v3.0 : ? - ?
Slackware v3.1 : ? - ?
Slackware v3.2 : ? - ?
Slackware v3.3 : ? - 2.0.34 based
Slackware v3.4 : ? - ?
Slackware v3.5 : ? - ?
Slackware v3.6 : ? - ?
Slackware v3.9 : ? - 2.0.37pre10 based
Slackware v4.0 : YES - 2.2.6 based
Slackware v7.0 : YES - 2.2.13 based
Slackware v7.1 : YES - 2.2.16 based
Slackware v8.0 : YES - 2.4.17 based
Slackware v8.1 : YES - ? based
Stampede Linux v? : ? - ?
SuSE v5.2 : YES - 2.0.32 base
SuSE v5.3 : YES - ?
SuSE v6.0 : YES - 2.0.36 based
SuSE v6.1 : YES - 2.2.5 based
SuSE v6.3 : YES - 2.2.13 based
Tomsrbt Linux v? : ? - ?
TurboLinux Lite v4.0 : YES - ?
TurboLinux v6.0 : YES - 2.2.12 based
TriLinux v? : ? - ?
Yggdrasil Linux v? : ? - ?