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RDKB-62412 LAN SSH dropbear allows wan SSH #191

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RDKB-62412 LAN SSH dropbear allows wan SSH #191

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RDKB-62412 LAN SSH dropbear allows wan SSH
umasankar096 Jan 27, 2026
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RDKB-62412 LAN SSH dropbear allows wan SSH
umasankar096 Jan 27, 2026
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RDKB-62412 LAN SSH dropbear allows wan SSH
umasankar096 Jan 27, 2026
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RDKB-62412 LAN SSH dropbear allows wan SSH
umasankar096 Jan 27, 2026
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RDKB-62412 LAN SSH dropbear allows wan SSH
umasankar096 Jan 27, 2026
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RDKB-62412 LAN SSH dropbear allows wan SSH
umasankar096 Jan 27, 2026
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RDKB-62412 LAN SSH dropbear allows wan SSH
umasankar096 Jan 27, 2026
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22 changes: 22 additions & 0 deletions source/firewall/firewall.c
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Original file line number Diff line number Diff line change
Expand Up @@ -10705,6 +10705,24 @@ static int do_wan2lan(FILE *fp)
return(0);
}

/*
* Procedure : do_block_lan_access_to_wan_ssh
* Purpose : To block SSH using WAN IP from LAN client
* Parameters :
* fp : An open file to write rules to block SSH using WAN IP in LAN client
* Return Values :
* 0 : Success
*/
#if defined(_SR213_PRODUCT_REQ_) || defined(_SCER11BEL_PRODUCT_REQ_)
static int do_block_lan_access_to_wan_ssh(FILE *fp)
{
FIREWALL_DEBUG("Entering do_block_lan_access_to_wan_ssh\n");
fprintf(fp, "-I INPUT 1 -i brlan0 -d %s -p tcp --dport 10022 -j REJECT\n", current_wan_ipaddr);
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@snayak002c snayak002c Feb 27, 2026

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is 10022 a hard coded ssh port in sky devices? , is it a generic issue or seen only in sky devices?

Also let's not hard code brlan0 interface name , use lan_ifname for private lan

FIREWALL_DEBUG("Exiting do_block_lan_access_to_wan_ssh\n");
return(0);
}
#endif

/*
==========================================================================
Ephemeral filter rules
Expand Down Expand Up @@ -13710,6 +13728,10 @@ static int prepare_enabled_ipv4_firewall(FILE *raw_fp, FILE *mangle_fp, FILE *na
do_lan2wan(mangle_fp, filter_fp, nat_fp);
do_wan2lan(filter_fp);
do_filter_table_general_rules(filter_fp);
#if defined(_SR213_PRODUCT_REQ_) || defined(_SCER11BEL_PRODUCT_REQ_)
if(isWanReady)
do_block_lan_access_to_wan_ssh(filter_fp);
#endif
#if defined(SPEED_BOOST_SUPPORTED)
WAN_FAILOVER_SUPPORT_CHECK
if(isWanServiceReady)
Expand Down