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Code Issues Releases Wiki Activity

status checks: check IPv6 reverse DNS

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This commit is contained in:
Joshua Tauberer 2015-12-07 08:58:48 -05:00
parent 20e11bbab3
commit fdad83a1bb
2 changed files with 13 additions and 8 deletions
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2
CHANGELOG.md
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@ -10,7 +10,7 @@ Mail:
Control panel: Control panel:
* When IPv6 is enabled, check that system services are accessible over IPv6 too. * When IPv6 is enabled, check that system services are accessible over IPv6 too and that reverse DNS is setup correctly for the IPv6 address.
* Explanatory text for setting up secondary nameserver is added/fixed. * Explanatory text for setting up secondary nameserver is added/fixed.
* DNS checks now have a timeout in case a DNS server is not responding, so the checks don't stall indefinitely. * DNS checks now have a timeout in case a DNS server is not responding, so the checks don't stall indefinitely.
* Better messages if external DNS is used and, weirdly, custom secondary nameservers are set. * Better messages if external DNS is used and, weirdly, custom secondary nameservers are set.

19
management/status_checks.py
View File

@ -347,15 +347,20 @@ def check_primary_hostname_dns(domain, env, output, dns_domains, dns_zonefiles):
issues listed here.""" issues listed here."""
% (env['PUBLIC_IP'], ip)) % (env['PUBLIC_IP'], ip))
# Check reverse DNS on the PRIMARY_HOSTNAME. Note that it might not be # Check reverse DNS matches the PRIMARY_HOSTNAME. Note that it might not be
# a DNS zone if it is a subdomain of another domain we have a zone for. # a DNS zone if it is a subdomain of another domain we have a zone for.
ipaddr_rev = dns.reversename.from_address(env['PUBLIC_IP']) existing_rdns_v4 = query_dns(dns.reversename.from_address(env['PUBLIC_IP']), "PTR")
existing_rdns = query_dns(ipaddr_rev, "PTR") existing_rdns_v6 = query_dns(dns.reversename.from_address(env['PUBLIC_IPV6']), "PTR") if env.get("PUBLIC_IPV6") else None
if existing_rdns == domain: if existing_rdns_v4 == domain and existing_rdns_v6 in (None, domain):
output.print_ok("Reverse DNS is set correctly at ISP. [%s ↦ %s]" % (env['PUBLIC_IP'], env['PRIMARY_HOSTNAME'])) output.print_ok("Reverse DNS is set correctly at ISP. [%s ↦ %s]" % (
else: env['PUBLIC_IP'] + (("/"+env['PUBLIC_IPV6']) if env.get("PUBLIC_IPV6") else ""),
env['PRIMARY_HOSTNAME']))
elif existing_rdns_v4 == existing_rdns_v6 or existing_rdns_v6 is None:
output.print_error("""Your box's reverse DNS is currently %s, but it should be %s. Your ISP or cloud provider will have instructions output.print_error("""Your box's reverse DNS is currently %s, but it should be %s. Your ISP or cloud provider will have instructions
on setting up reverse DNS for your box at %s.""" % (existing_rdns, domain, env['PUBLIC_IP']) ) on setting up reverse DNS for your box.""" % (existing_rdns_v4, domain) )
else:
output.print_error("""Your box's reverse DNS is currently %s (IPv4) and %s (IPv6), but it should be %s. Your ISP or cloud provider will have instructions
on setting up reverse DNS for your box.""" % (existing_rdns_v4, existing_rdns_v6, domain) )
# Check the TLSA record. # Check the TLSA record.
tlsa_qname = "_25._tcp." + domain tlsa_qname = "_25._tcp." + domain