Added by Grischa Zengel over 9 years ago. Updated over 3 years ago.
100%
Description
After swapping IP from two embedded devices (WizNet RS485 Gateways) the gateways weren't reachable from an other subnet.
I had to log in and to clear the cache with 'arp -c -a'.
It would be nice to have a button to clear the cache in "Diagnostics: ARP Table".
Files
| diag_arp-patch.tgz (771 Bytes) diag_arp-patch.tgz | Josh Finlay, 01/21/2015 11:37 PM | ||
| diag_arp.php.diff (1.33 KB) diag_arp.php.diff | Josh Finlay, 01/22/2015 12:20 AM |
Updated by Josh Finlay over 9 years ago
Grischa Zengel wrote:
After swapping IP from two embedded devices (WizNet RS485 Gateways) the gateways weren't reachable from an other subnet.
I had to log in and to clear the cache with 'arp -c -a'.
It would be nice to have a button to clear the cache in "Diagnostics: ARP Table".
Hi Grischa,
I stumbled across your issue and decided to write a patch for this. It is tested on 2.1.5-RELEASE.
You should apply diag_arp.php.diff to diag_arp.php in /usr/local/www
And place diag_arpclear.php in the same location.
-- Josh
Updated by Chris Buechler over 9 years ago
Applying that may be dangerous, in that it leaves a file on your system with no authentication that clears your ARP table. We'd never put that in without authentication, though it's probably minimal risk especially with the default only open LAN-side.
Updated by Josh Finlay over 9 years ago
Chris Buechler wrote:
Applying that may be dangerous, in that it leaves a file on your system with no authentication that clears your ARP table. We'd never put that in without authentication, though it's probably minimal risk especially with the default only open LAN-side.
Hi Chris,
I agree, however I am somewhat unfamiliar with pfSense's development so I was unsure whether there was anything to call that would validate the login session. If you can point me in the right direction, I'd be happy to update my patch.
-- Josh
Updated by Josh Finlay over 9 years ago
Chris Buechler wrote:
Applying that may be dangerous, in that it leaves a file on your system with no authentication that clears your ARP table. We'd never put that in without authentication, though it's probably minimal risk especially with the default only open LAN-side.
Hi again Chris,
I've taken a different approach which avoids using AJAX to call the script to clear the ARP cache and instead have done it inside diag_arp.php which should have already taken care of the authentication and login validation (why re-invent the wheel? ;-) ).
Please see my diff now, which no longer requires diag_arpclear.php
-- Josh
Updated by Viktor Gurov almost 4 years ago
Updated by Jim Pingle almost 4 years ago
Updated by Renato Botelho over 3 years ago
PR has been merged. Thanks!
Updated by Jim Pingle over 3 years ago
Updated by Anonymous