From: raemer@... Date: 2019-12-20T13:02:18+00:00 Subject: [ruby-core:96374] [Ruby master Bug#16439] Resolv::DNS: timeouts if multiple IPv6 name servers are given and address contains leading zero Issue #16439 has been reported by jmr (Jan-Martin R�mer). ---------------------------------------- Bug #16439: Resolv::DNS: timeouts if multiple IPv6 name servers are given and address contains leading zero https://bugs.ruby-lang.org/issues/16439 * Author: jmr (Jan-Martin R�mer) * Status: Open * Priority: Normal * Assignee: * Target version: * ruby -v: * Backport: 2.5: UNKNOWN, 2.6: UNKNOWN ---------------------------------------- Hi, Resolv::DNS does not return any results under those conditions: - there are at least two name servers (in /etc/resolv.conf). - The name servers have IPv6 addresses containing leading zeros. Example resolv.conf: nameserver 2001:0db8::0001:1 nameserver 2001:0db8::0002:1 This is caused by a mismatch in representation of the address: Requester::sender_for compares the address of the answering server (e.g. 2001:0db8::1:1) with the address the request was sent to (e.g. 2001:0db8::0001:1). This can be fixed by stripping leading zeros from the sender's address, as done in the attached patch. Best regards, Jan-Martin ---Files-------------------------------- resolv.rb.patch (397 Bytes) -- https://bugs.ruby-lang.org/ Unsubscribe: