Bug 53356
| Summary: | iptables -j DNAT does not work in kernel 2.4.3-12 | ||
|---|---|---|---|
| Product: | [Retired] Red Hat Linux | Reporter: | Klaus Muth <muth> |
| Component: | kernel | Assignee: | Arjan van de Ven <arjanv> |
| Status: | CLOSED NOTABUG | QA Contact: | Brock Organ <borgan> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 7.1 | ||
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | i686 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2001-09-07 09:30:52 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: | |||
This is a UTS-Bug (User too stupid). Portforwarding did not work, because the server behind the firewall had no route back for the test (somebody rebooted it). |
From Bugzilla Helper: User-Agent: Mozilla/4.76 [de] (X11; U; Linux 2.4.2-2 i686; Nav) Description of problem: After reading about the ip_conntrack_ftp exploit I tried to get a new kernel. I compiled the kernel with the same config, but now the port forwarding rules do not work: the iptables commands are accepted, the packets are counted, but there is no forwarding ;/. I dont't know whether the packets are dropped or whatever. Version-Release number of selected component (if applicable): How reproducible: Always Steps to Reproduce: 1. Configure a firewall with some port forwarding rules 2. Try until all works fine 3. Upgrade the 2.4.2-2 kernel to a 2.4.3-12 kernel 4. The forwarded ports do not work Additional info: Chain PREROUTING (policy ACCEPT 65 packets, 11672 bytes) pkts bytes target prot opt in out source destination 0 0 DNAT tcp -- any any anywhere 212.107.169.6 tcp dpt:ftp-data to:192.168.42.2:20 1 60 DNAT tcp -- any any anywhere 212.107.169.6 tcp dpt:ftp to:192.168.42.2:21 0 0 DNAT tcp -- any any anywhere 212.107.169.6 tcp dpt:http to:192.168.42.2:80 2 120 DNAT tcp -- any any anywhere 212.107.169.6 tcp dpt:2367 to:192.168.42.2:2367 Packets counted but not forwarded ;/