Bug 404761
| Summary: | Packet lost inside kernel | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Eric Hopper <eric-bugs> |
| Component: | kernel | Assignee: | Kernel Maintainer List <kernel-maint> |
| Status: | CLOSED NOTABUG | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | high | Docs Contact: | |
| Priority: | low | ||
| Version: | 7 | ||
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | athlon | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2007-12-02 02:00:45 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
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Description
Eric Hopper
2007-11-29 17:59:39 UTC
Better kernel log: Nov 29 09:47:58 dark kernel: device eth0 entered promiscuous mode Nov 29 09:47:58 dark kernel: audit(1196358478.738:10): dev=eth0 prom=256 old_prom=0 auid=4294967295 Nov 29 09:48:12 dark kernel: debug2 IN=eth0 OUT= MAC=00:0d:61:91:5d:e6:00:90:1a:40:a2:a2:08:00 SRC=209.40.196.143 DST=216.254.16.17 LEN=84 TOS=0x00 PREC=0x20 TTL=58 ID=0 DF PROTO=ICMP TYPE=8 CODE=0 ID=49484 SEQ=1 Nov 29 09:48:14 dark kernel: debug2 IN=eth0 OUT= MAC=00:0d:61:91:5d:e6:00:90:1a:40:a2:a2:08:00 SRC=209.40.196.143 DST=216.254.16.17 LEN=84 TOS=0x00 PREC=0x20 TTL=58 ID=0 DF PROTO=ICMP TYPE=8 CODE=0 ID=49484 SEQ=2 Nov 29 09:48:16 dark kernel: debug2 IN=eth0 OUT= MAC=00:0d:61:91:5d:e6:00:90:1a:40:a2:a2:08:00 SRC=209.40.196.143 DST=216.254.16.17 LEN=84 TOS=0x00 PREC=0x20 TTL=58 ID=0 DF PROTO=ICMP TYPE=8 CODE=0 ID=49484 SEQ=3 Nov 29 09:50:31 dark kernel: debug2 IN=eth0 OUT= MAC=00:0d:61:91:5d:e6:00:90:1a:40:a2:a2:08:00 SRC=67.15.240.43 DST=216.254.16.17 LEN=78 TOS=0x00 PREC=0x20 TTL=53 ID=0 DF PROTO=ICMP TYPE=8 CODE=0 ID=1 SEQ=9131 (In reply to comment #0) > > In the following, notice how the debug2 LOG target never seems to be fired. > > LOG icmp -- 0.0.0.0/0 216.254.16.17 LOG flags 0 level 4 > prefix `debug2 ' > Nov 29 09:48:12 dark kernel: debug2 IN=eth0 OUT= ^^^^^^ debug2 is there------------------- > MAC=00:0d:61:91:5d:e6:00:90:1a:40:a2:a2:08:00 SRC=209.40.196.143 > DST=216.254.16.17 LEN=84 TOS=0x00 PREC=0x20 TTL=58 ID=0 DF PROTO=ICMP TYPE=8 > CODE=0 ID=49484 SEQ=1 I'm sorry, I meant 'debug'. 'debug2' is associated with the rule for 216.254.16.17, an IP that is properly routed and everything. And 'debug' is associated with the rule for 216.254.16.18, an IP for which all of the incoming packets are currently being eaten by the kernel somewhere between tcpdump and raw:PREROUTING Please post the output of the 'ifconfig' command. eth0 Link encap:Ethernet HWaddr 00:0D:61:91:5D:E6
inet addr:216.254.16.16 Bcast:216.254.16.16 Mask:255.255.255.255
inet6 addr: fe80::20d:61ff:fe91:5de6/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:321895 errors:0 dropped:0 overruns:0 frame:0
TX packets:270299 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:173078587 (165.0 MiB) TX bytes:150066298 (143.1 MiB)
Interrupt:22 Base address:0xa000
The packets destined for 216.254.16.18 are being sent to a different network adapter, with MAC address 00:e0:81:2c:b6:e2 Oh, you're right. I didn't notice this. How interesting and odd. Thanks a whole lot. This is now not the bug I thought it was, but may still be a bug. 216.254.16.16 is a firewall. I have 4 static IPs not in a subnetwork. I have eth0 configured to proxy arp. So 216.254.16.1 (the gateway at the ISP) should never have seen that ethernet address, which is the Ethernet address of 216.254.16.18. Oh! I know how that happened. It was because of a debugging session with my ISP. It took many minutes awhile for the gateway's ARP cache to timeout. Something very weird is going on with the way my ISP is routing packets and they've been trying to blame it on me. Sorry to call in a bug report when it wasn't. |