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Hi everyone,</div>
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I am setting up a Sipwise CE MR13.5.1 system with Easybell (Germany) and facing specific configuration challenges regarding their "Split Horizon" infrastructure.</div>
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We are looking for advice on the best practice / upgrade-safe way to solve these in the CE version, as we want to avoid modifying the raw Kamailio templates (kamailio.cfg.tt2).</div>
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1. Connectivity: DNS & Inbound Matching As discussed in various VoIP user groups (e.g., IP-Phone-Forum), Easybell uses a redundant setup where the main proxy sip.easybell.com resolves via SRV/A records to specific gateways (e.g., a.sip.easybell.com at 195.185.214.173
and b.sip.easybell.com at 195.52.221.142).</div>
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Outbound: We handle this by setting the Peer Host to sip.easybell.com. LCR resolves this correctly.</div>
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Inbound Question: When calls come in from Easybell, they originate from one of these specific IPs (195.x.x.x).</div>
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Does Sipwise CE automatically resolve the configured Peer Hostname (sip.easybell.com) and add the resulting A-record IPs to the trusted permissions table for inbound matching?</div>
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Or is it required to manually add the specific IPs (195...) as additional Peer Servers to ensure inbound calls are correctly matched to this Peering Group?</div>
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2. Identity: From-Header Mismatch & Upgrade Safety Regardless of the connection domain (.com), Easybell strictly requires the From-Header and Auth Realm to be sip.easybell.de.</div>
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If we connect to sip.easybell.com, Sipwise defaults to sending the local domain user@sip.local.domain or the connection domain user@sip.easybell.com in the From-Header.</div>
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Easybell rejects this (403/407 loop) because it expects <user@sip.easybell.de>.</div>
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The Missing Feature in MR13.5 CE: This "Split Horizon" requirement is well-known in the Kamailio community and typically solved using uac_replace_from(). In previous Sipwise versions (or PRO), this was handled via the outbound_from_domain preference or Header
Rule Sets.</div>
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However, these options appear to be hidden/removed in the CE MR13.5 GUI.</div>
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My Question: What is the recommended, upgrade-safe method in Sipwise CE to force the From-Domain to sip.easybell.de?</div>
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Is there a specific "custom hook" or configuration file intended for this type of header manipulation in the modern CE architecture that survives system upgrades?</div>
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Thanks for your support!</div>
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Best regards, Atilla</div>
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