2.2.17pre6 icmp oddities

[elijah wright <elw@stderr.org>]

i *think* i've found a buglet... but am not sure....

my alpha is currently sitting in my bedroom floor as my ADSL router... the
external interface is a /26 netmask... 255.255.255.192... and it seems to
be spewing icmp packets to inappropriate places when i ping machines in
the "outside world"... outside meaning anything outside of the local ADSL
network.  somehow, packets are getting duplicated (or something) and i'm
setting off a lot of copies of blackice (something like that, perhaps not
necessarily blackice) that are inside the /26 region with me.

any thoughts?  has anyone seen this happen before??  

a couple more things- when i ping the outside world, the icmp packets i
get back claim to have received a number of corrupt bytes.  like this:

>>>>>>>>>>

Password:
Last login: Sun Sep 10 18:51:05 2000 from :0.0 on pts/1
Linux beta 2.2.17 #1 Thu Jun 29 13:33:28 EDT 2000 alpha unknown

Most of the programs included with the Debian GNU/Linux system are
freely redistributable; the exact distribution terms for each program
are described in the individual files in /usr/share/doc/*/copyright

Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
elw@beta:~$ ping 149.149.11.7
PING 149.149.11.7 (149.149.11.7): 56 data bytes
64 bytes from 149.149.11.7: icmp_seq=0 ttl=245 time=155.3 ms
wrong data byte #8 should be 0x8 but was 0xfa
        c d e f 10 11 12 13 14 15 16 17 18 19 1a 1b 1c 1d 1e 1f 20 21 22
23 24 25 26 27 28 29 2a 2b
        2c 2d 2e 2f 0 0 0 0 0 0 0 0 0 0 0 0
64 bytes from 149.149.11.7: icmp_seq=1 ttl=245 time=182.8 ms
wrong data byte #8 should be 0x8 but was 0x52
        c d e f 10 11 12 13 14 15 16 17 18 19 1a 1b 1c 1d 1e 1f 20 21 22
23 24 25 26 27 28 29 2a 2b
        2c 2d 2e 2f 0 0 0 0 0 0 0 0 0 0 0 0
64 bytes from 149.149.11.7: icmp_seq=2 ttl=245 time=204.2 ms
wrong data byte #8 should be 0x8 but was 0xd1
        c d e f 10 11 12 13 14 15 16 17 18 19 1a 1b 1c 1d 1e 1f 20 21 22
23 24 25 26 27 28 29 2a 2b
        2c 2d 2e 2f 0 0 0 0 0 0 0 0 0 0 0 0

--- 149.149.11.7 ping statistics ---
3 packets transmitted, 3 packets received, 0% packet loss
round-trip min/avg/max = 155.3/180.7/204.2 ms
elw@beta:~$

<<<<<<<<<<<<<<<<


if someone could do some remote debugging for me i'd be grateful :)

thanks!
elijah


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