Buenas he tenido algunos problemas en la conexion de mi router aleatoriamente y no se que hacer la verdad soy el host del router que esta conectado al modem miren aca les dejo los logs haber si pueden ayudar

(none) Jan 20 07:52:02 tproxy[26474]: Could not connect to destination
(none) Jan 20 07:52:08 tproxy[26467]: connect(): Connection refused
(none) Jan 20 07:52:08 tproxy[26467]: Could not connect to destination
(none) Jan 20 07:52:20 tproxy[26092]: Alarm signal caught - connection timeout
(none) Jan 20 07:52:21 tproxy[26056]: Alarm signal caught - connection timeout
(none) Jan 20 07:52:23 tproxy[26091]: Alarm signal caught - connection timeout
(none) Jan 20 07:53:56 tproxy[26410]: Alarm signal caught - connection timeout
(none) Jan 20 07:53:57 tproxy[26160]: Alarm signal caught - connection timeout
(none) Jan 20 07:53:58 tproxy[26159]: Alarm signal caught - connection timeout
(none) Jan 20 07:53:58 tproxy[26460]: Alarm signal caught - connection timeout
(none) Jan 20 07:53:59 tproxy[26468]: Alarm signal caught - connection timeout
(none) Jan 20 07:53:59 tproxy[26468]: Alarm signal caught - connection timeout

yo tengo el mismo problema pero agregandole
getsockopt(SO_ORIGINAL_DST): No such file or directory
que sra lo que esta molestando !!!!

Habeis probado a actualizar el firmware??
Tambien puede ser un error de configuracion del servidor proxy si lo usais.
Pero yo probaria primero a actualizar el firmware. Lo bajais de la pagina oficial de 3com

Saludos