[Bug 953876] Re: Can not specify different DNSBLs for IPv4/IPv6
A test case to reproduce the issue would be useful, but I agree with paride this should really be addressed upstream. Please file the bug at https://bugs.exim.org/ if it remains an issue for you. If you do, and send us the link to the bug report we can track it and pull the fix if you'd like. ** Changed in: exim4 (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/953876 Title: Can not specify different DNSBLs for IPv4/IPv6 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/exim4/+bug/953876/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 953876] Re: Can not specify different DNSBLs for IPv4/IPv6
This seems an issue that should be filed upstream[1], I don't think a fix would really belong to the Ubuntu packaging. [1] https://bugs.exim.org/ -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/953876 Title: Can not specify different DNSBLs for IPv4/IPv6 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/exim4/+bug/953876/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 953876] Re: Can not specify different DNSBLs for IPv4/IPv6
>From a cursory examination of 30_exim4-config_check_rcpt I don't see evidence of support for running different hooks for ipv4 vs ipv6 addresses, so presumably this is still an issue? If it is, it would be helpful to have a way to artificially reproduce the issue. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/953876 Title: Can not specify different DNSBLs for IPv4/IPv6 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/exim4/+bug/953876/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 953876] Re: Can not specify different DNSBLs for IPv4/IPv6
** Description changed:
There is only one hook for checking DNSBLs in
acl/30_exim4-config_check_rcpt which is run unconditionally for both
IPv4 and IPv6 addresses. This can lead to problems when IPv6 addresses
- are checked against IPv4-only lists. See exim spec 40.35.
+ are checked against IPv4-only lists.
+
+ From exim spec 40.35:
+
+ 40.35 DNS lists and IPv6
+ If Exim is asked to do a dnslist lookup for an IPv6 address, it inverts it
nibble by nibble. For example, if the calling host’s IP address is
3ffe::836f:0a00:000a:0800:200a:c031, Exim might look up
+
+ 1.3.0.c.a.0.0.2.0.0.8.0.a.0.0.0.0.0.a.0.f.6.3.8.f.f.f.f.e.f.f.3.blackholes
+ .mail-abuse.org
+
+ Unfortunately, some of the DNS lists contain wildcard records, intended
+ for IPv4, that interact badly with IPv6. For example, the DNS entry
+
+ *.3.some.list.example.A127.0.0.1
+
+ is probably intended to put the entire 3.0.0.0/8 IPv4 network on the
+ list. Unfortunately, it also matches the entire 3::/4 IPv6 network.
+
+ You can exclude IPv6 addresses from DNS lookups by making use of a
+ suitable condition condition, as in this example:
+
+ denycondition = ${if isip4{$sender_host_address}}
+ dnslists = some.list.example
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Title:
Can not specify different DNSBLs for IPv4/IPv6
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[Bug 953876] Re: Can not specify different DNSBLs for IPv4/IPv6
** Changed in: exim4 (Ubuntu) Importance: Undecided => Medium -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/953876 Title: Can not specify different DNSBLs for IPv4/IPv6 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/exim4/+bug/953876/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
