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Bug #12196

closed

IPsec settings fail to apply when a remote gateway is set to an FQDN and there are no DNS servers available

Added by Viktor Gurov over 3 years ago. Updated about 3 years ago.

Status:
Resolved
Priority:
Normal
Assignee:
Viktor Gurov
Category:
IPsec
Target version:
2.6.0
Start date:
Due date:
% Done:

100%

Estimated time:
Plus Target Version:
22.01
Release Notes:
Default
Affected Version:
2.5.2
Affected Architecture:

Description

How to reproduce:
1) Disable DNS servers or configure non-existent DNS servers on the System / General Setup page;
2) Configure IPsec PH1 with example.com remote gateway;
3) Press apply.
Result:
504 Gateway Time-out error

resolve_retry() - setting `$retries = 10` can improve FQDN resolution time:

# trying to resolve "example.com" when DNS server is no available:
# time php -f resolve50retries.php
0.176u 0.047s 0:18.14 1.1%    4588+402k 91+0io 0pf+0w
# time php -f resolve10retries.php
0.136u 0.045s 0:03.36 5.0%    3968+364k 51+0io 0pf+0w

Related issues

Related to Bug #12026: Applying IPsec settings for many tunnels is slow or times outResolvedJim Pingle06/11/2021

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