https://issues.apache.org/SpamAssassin/show_bug.cgi?id=6221
Summary: DnsResolver.pm attempts to bind ports at random
Product: Spamassassin
Version: 3.2.5
Platform: Other
OS/Version: All
Status: NEW
Severity: normal
Priority: P5
Component: Libraries
AssignedTo: [email protected]
ReportedBy: [email protected]
Created an attachment (id=4551)
--> (https://issues.apache.org/SpamAssassin/attachment.cgi?id=4551)
Patch to always use port 0 instead of trying ports at random
DnsResolver.pm attempts to bind UDP ports at random. This causes numerous
errors if listening on specific ports is restricted to specific
applications/users.
The correct way to acquire a UDP socket to listen for responses is to bind to
port 0 instead. The OS will automatically allocate an appropriate free port
from the range defined for local allocation (net.ipv4.ip_local_port_range on
Linux).
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